Pretension calculation method and device in flexible photovoltaic cable truss structure, storage medium and electronic device

Abstract

The invention discloses a method and device for calculating pretension in a flexible photovoltaic cable truss structure, a storage medium and an electronic device. The method for calculating the pretension in the flexible photovoltaic cable truss structure comprises the steps that modeling parameters and first internal force parameters of a structure calculation model are obtained; according to the modeling parameters of the structure calculation model and the first internal force parameters, determining the structure calculation model which corresponds to the flexible photovoltaic cable truss structure and is in a balanced state; obtaining a first control condition and a second control condition determined according to the target load parameter; according to the first control condition and the second control condition, target internal force corresponding to each component object in the structural calculation model is determined, and the target internal force of the component object is determined according to the reference internal force of the component object and the target coefficient. The technical problems of low pretension calculation efficiency and inaccurate pretension calculation in a flexible photovoltaic cable truss structure in the prior art are solved.

Description

Technical Field

[0001] The present application relates to the field of structural engineering, and in particular, to a method, device, storage medium and electronic device for calculating pre-tension in a flexible photovoltaic cable truss structure. Background Art

[0002] The calculation of the pre-tension of the flexible photovoltaic support structure is a key engineering and technical issue, which is crucial to ensure the wind resistance stiffness of the entire structural system. If the pre-tension is too small, the deformation under the design condition may not meet the requirements, weakening the wind resistance of the structural system; while if the pre-tension is too large, the cable force of the cable structure under the limit state may exceed the allowable value of its breaking force, increasing the force of the end support under the limit condition and the cost of the related end support foundation.

[0003] At present, the common method for calculating the pre-tension of flexible photovoltaic cable truss structure is to adjust the trial calculation method. This method has the following disadvantages:

[0004] First, the workload of repeated adjustment and calculation is large, time-consuming and inefficient, especially when there are a large number of load combinations in normal use.

[0005] Second, the adjustment principle of the cable and rod pre-tension is not clear, and the cable and rod pre-tension adjustment is blind. Different adjustment processes may result in different adjustment results.

[0006] Third, there are contradictions in the cable pre-tension after adjustment under various working conditions. For example, the cable tension adjusted for the gravity load combination often cannot guarantee the suitability for the upward suction load combination.

[0007] To address the above-mentioned problems, no effective solution has been proposed yet. Summary of the invention

[0008] The embodiments of the present application provide a method, device, storage medium and electronic device for calculating pre-tension in a flexible photovoltaic cable truss structure, so as to at least solve the technical problem of low efficiency of pre-tension calculation in a flexible photovoltaic cable truss structure in the related art.

[0009] According to one aspect of an embodiment of the present application, a method for calculating pretension in a flexible photovoltaic cable truss structure is provided, comprising: obtaining a structural calculation model modeling parameter and a first internal force parameter, wherein the structural calculation model modeling parameter is used to indicate the arch height of an upper chord in the flexible photovoltaic cable truss structure, the flexible photovoltaic cable truss structure includes a cable truss structure, the cable truss structure includes an upper chord and a lower chord, both ends of the upper chord and the lower chord are respectively connected to a column structure, the upper chord and the lower chord are connected by at least one web member, and the first internal force parameter is used to configure a first internal force for each component object in the flexible photovoltaic cable truss structure; according to the structural calculation model modeling parameter and the first internal force parameter, determine the horizontal position corresponding to the flexible photovoltaic cable truss structure A structural calculation model in a state of equilibrium, wherein each component object in the structural calculation model in a state of equilibrium corresponds to a reference internal force; a first control condition and a second control condition determined according to a target load parameter are obtained, wherein the target load parameter is a load uniform distribution value corresponding to an upper chord under the target load condition, the first control condition is to use a first pressure value of a first target subsegment as an internal force control condition corresponding to the upper chord, and the second control condition is to use a second pressure value of a second target subsegment as an internal force control condition corresponding to a lower chord; according to the first control condition and the second control condition, the target internal force corresponding to each component object in the structural calculation model is determined, wherein the target internal force of the component object is determined according to the reference internal force and the target coefficient of the component object.

[0010] According to another aspect of an embodiment of the present application, a pretension calculation device in a flexible photovoltaic cable truss structure is also provided, including: a first acquisition unit, which acquires modeling parameters of a structural calculation model and a first internal force parameter, wherein the modeling parameters of the structural calculation model are used to indicate the arch height of an upper chord in the flexible photovoltaic cable truss structure, the flexible photovoltaic cable truss structure includes a cable truss structure, the cable truss structure includes an upper chord and a lower chord, both ends of the upper chord and the lower chord are respectively connected to the column structure, the upper chord and the lower chord are connected by at least one web member, and the first internal force parameter is used to configure a first internal force for each component object in the flexible photovoltaic cable truss structure; a first determination unit, which determines, according to the modeling parameters of the structural calculation model and the first internal force parameter, a flat portion corresponding to the flexible photovoltaic cable truss structure. A structural calculation model in a state of equilibrium, wherein each component object in the structural calculation model in a state of equilibrium corresponds to a reference internal force; a second acquisition unit, acquiring a first control condition and a second control condition determined according to a target load parameter, wherein the target load parameter is a load uniform distribution value corresponding to an upper chord under the target load condition, the first control condition is to use a first pressure value of a first target sub-segment as an internal force control condition corresponding to the upper chord, and the second control condition is to use a second pressure value of a second target sub-segment as an internal force control condition corresponding to a lower chord; a second determination unit, determining a target internal force corresponding to each component object in the structural calculation model according to the first control condition and the second control condition, wherein the target internal force of the component object is determined according to the reference internal force of the component object and a target coefficient.

[0011] Optionally, the second acquisition unit includes: a third determination unit, used to determine the mid-span bending moment of the flexible photovoltaic cable truss structure according to the target load parameters and the cable truss span value of the cable truss structure, wherein the cable truss span value is the distance between the column structures; determine a first control condition matching a first target sub-segment in the upper chord according to the ratio of the mid-span bending moment to N times the cable truss height value, where N is the number of roots of the upper chord; determine a second control condition matching a second target sub-segment in the lower chord according to the ratio of the mid-span bending moment to S times the cable truss height value, where S is the number of roots of the lower chord.

[0012] Optionally, the third determination unit includes: a fourth determination unit, used to take the product of the target load parameter and the square of the cable truss span value as the first parameter; and determine the mid-span bending moment of the flexible photovoltaic cable truss structure according to the ratio of the first parameter to the target constant.

[0013] Optionally, the above-mentioned first determination unit includes: a fifth determination unit, used to obtain a first adjustment coefficient corresponding to a first target sub-segment in the structural calculation model in an equilibrium state, and a second adjustment coefficient corresponding to a second target sub-segment; determine the target coefficient according to the first adjustment coefficient and the second adjustment coefficient; determine the product of the reference internal force corresponding to each component object in the structural calculation model in an equilibrium state and the target coefficient as the target internal force corresponding to each component object in the structural calculation model, wherein the first product between the reference internal force of the first target sub-segment and the target coefficient is greater than the first pressure value in the first control condition, and the second product between the reference internal force of the second target sub-segment and the target coefficient is greater than the second pressure value in the second control condition.

[0014] Optionally, the above-mentioned first determination unit also includes: a sixth determination unit, which is used to determine the gravity direction load parameters of the flexible photovoltaic cable truss structure according to the self-weight magnification coefficient of the flexible photovoltaic cable truss structure and the self-weight magnification coefficient of the photovoltaic panel; determine the upper wind suction load parameters according to the layout position of the flexible photovoltaic cable truss structure; determine the target load parameters according to the gravity direction load parameters and the upper wind suction load parameters.

[0015] Optionally, the above-mentioned second determination unit includes a seventh determination unit, which is used to obtain a cable truss height value indicating the structural height of the cable truss structure; determine the geometric relationship between each component object in the structural calculation model according to the cable truss height value and the modeling parameters of the structural calculation model; configure the first internal force for the target component unit in the structural calculation model according to the first internal force parameter; and determine the structural calculation model in a balanced state according to the first internal force.

[0016] Optionally, the seventh determination unit includes an eighth determination unit, which is used to determine the second internal force of each component object in the structural calculation model according to the first internal force; when the difference between the second internal force corresponding to each component object and the first internal force does not meet the target condition, the second internal force corresponding to each component object in the structural calculation model is used as the first internal force, and the structural displacement is reset to zero, and the structural calculation is performed again, and this step is repeated until the difference between the second internal force corresponding to each component object and the first internal force meets the target condition; when the difference between the second internal force corresponding to each component object and the first internal force meets the target condition, the second internal force corresponding to each component object in the structural calculation model is determined as the reference internal force.

[0017] According to another aspect of an embodiment of the present invention, a computer-readable storage medium is provided, in which a computer program is stored, wherein the computer program is configured to execute the above-mentioned pre-tension calculation method in the flexible photovoltaic cable truss structure when running.

[0018] According to another aspect of the embodiment of the present application, a computer program product or a computer program is provided, the computer program product or the computer program including computer instructions, the computer instructions being stored in a computer-readable storage medium. A processor of a computer device reads the computer instructions from the computer-readable storage medium, and the processor executes the computer instructions, so that the computer device executes the pretension calculation method in the flexible photovoltaic cable truss structure as described above.

[0019] According to another aspect of an embodiment of the present application, an electronic device is also provided, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the pre-tension calculation method in the flexible photovoltaic cable truss structure through the computer program.

[0020] In an embodiment of the present application, a structural calculation model modeling parameter and a first internal force parameter are obtained, wherein the structural calculation model modeling parameter is used to indicate the arch height of the upper chord in the flexible photovoltaic cable truss structure, the flexible photovoltaic cable truss structure includes a cable truss structure, the cable truss structure includes an upper chord and a lower chord, the ends of the upper chord and the lower chord are respectively connected to the column structure, the upper chord and the lower chord are connected by at least one web member, and the first internal force parameter is used to configure the first internal force for each component object in the flexible photovoltaic cable truss structure; according to the structural calculation model modeling parameter and the first internal force parameter, a structural calculation model in a balanced state corresponding to the flexible photovoltaic cable truss structure is determined, wherein Each component object in the structural calculation model in a balanced state corresponds to a reference internal force; a first control condition and a second control condition determined according to a target load parameter are obtained, wherein the target load parameter is a load uniform distribution value corresponding to the upper chord under the target load condition, the first control condition is to use the first pressure value of the first target sub-segment as the internal force control condition corresponding to the upper chord, and the second control condition is to use the second pressure value of the second target sub-segment as the internal force control condition corresponding to the lower chord; according to the first control condition and the second control condition, the target internal force corresponding to each component object in the structural calculation model is determined, wherein the target internal force of the component object is determined according to the reference internal force and the target coefficient of the component object.

[0021] By using the pre-tension calculation method in the above-mentioned flexible photovoltaic cable truss structure, by obtaining the modeling parameters of the structural calculation model and the first internal force parameters, wherein the modeling parameters of the structural calculation model are used to indicate the arch height of the upper chord in the flexible photovoltaic cable truss structure, the flexible photovoltaic cable truss structure includes a cable truss structure, the cable truss structure includes an upper chord and a lower chord, the ends of the upper chord and the lower chord are respectively connected to the column structure, the upper chord and the lower chord are connected by at least one web member, the first internal force parameter is used to configure the first internal force for each component object in the flexible photovoltaic cable truss structure, and then determine the first internal force related to the flexible photovoltaic cable truss according to the modeling parameters of the structural calculation model and the first internal force parameter. A structural calculation model in equilibrium state corresponding to the frame structure is obtained, wherein each component object in the structural calculation model in equilibrium state corresponds to a reference internal force, and a first control condition and a second control condition determined according to the target load parameters are further obtained, so that the target internal force corresponding to each component object in the structural calculation model is determined according to the first control condition and the second control condition. The target internal force of the cable and the rod is the pretensioning force that needs to be calculated, thereby improving the efficiency and accuracy of pretensioning force calculation in the flexible photovoltaic cable truss structure, thereby solving the technical problems of low internal force acquisition efficiency and inaccurate internal force calculation in the flexible photovoltaic cable truss structure in the related technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0023] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0024] Figure 1 is a hardware environment schematic diagram of a method for calculating pre-tension in a flexible photovoltaic cable truss structure according to an embodiment of the present application;

[0025] Figure 2 is a flow chart of an optional method for calculating pre-tension in a flexible photovoltaic cable truss structure according to an embodiment of the present application;

[0026] Figure 3 is a schematic diagram of an optional method for calculating pre-tension in a flexible photovoltaic cable truss structure according to an embodiment of the present application;

[0027] Figure 4 is a schematic diagram of another optional method for calculating pre-tension in a flexible photovoltaic cable truss structure according to an embodiment of the present application;

[0028] Figure 5 is a flow chart of another optional method for calculating pre-tension in a flexible photovoltaic cable truss structure according to an embodiment of the present application;

[0029] Figure 6 is a schematic diagram of another optional method for calculating pre-tension in a flexible photovoltaic cable truss structure according to an embodiment of the present application;

[0030] Figure 7 is a schematic diagram of another optional method for calculating pre-tension in a flexible photovoltaic cable truss structure according to an embodiment of the present application;

[0031] Figure 8 is a schematic diagram of another optional method for calculating pre-tension in a flexible photovoltaic cable truss structure according to an embodiment of the present application;

[0032] Fig. 9 is a schematic diagram of an optional pre-tension calculation device in a flexible photovoltaic cable truss structure according to an embodiment of the present invention;

[0033] Fig.10 2 is a schematic diagram of components of an optional electronic device according to an embodiment of the present invention. DETAILED DESCRIPTION

[0034] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0035] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0036] According to one aspect of an embodiment of the present application, a method for calculating pre-tension in a flexible photovoltaic cable truss structure is provided. Optionally, as an optional implementation, the method for calculating pre-tension in a flexible photovoltaic cable truss structure can be applied to, but is not limited to, Figure 1 The flexible photovoltaic cable truss structure drawing display system is composed of the terminal device 102, the server 104 and the network 110. Figure 1 As shown, the terminal device 102 is connected and communicated with the server 104 through the network 110. The above network may include but is not limited to: wired network, wireless network, wherein the wired network includes: local area network, metropolitan area network and wide area network, and the wireless network includes: Bluetooth, WIFI and other networks that realize wireless communication. The above terminal device may include but is not limited to at least one of the following: mobile phone (such as Android mobile phone, iOS mobile phone, etc.), laptop computer, tablet computer, PDA, MID (Mobile Internet Devices), PAD, desktop computer, smart TV, car-mounted equipment, etc. The above terminal device 102 may include but is not limited to a display, a processor and a memory, and the above server 104 may be a single server, or a server cluster composed of multiple servers, or a cloud server. The above server includes a database and a processing engine.

[0037] The specific process can be as follows:

[0038] Step S102, the terminal device 102 sends a flexible photovoltaic cable truss structure pre-tension calculation request to the server 104 through the network 110;

[0039] Steps S104-S110, obtaining modeling parameters of the structural calculation model and a first internal force parameter, wherein the modeling parameters of the structural calculation model are used to indicate the arch height of the upper chord in the flexible photovoltaic cable truss structure, the flexible photovoltaic cable truss structure includes a cable truss structure, the cable truss structure includes an upper chord and a lower chord, the ends of the upper chord and the lower chord are respectively connected to the column structure, the upper chord and the lower chord are connected by at least one web member, and the first internal force parameter is used to configure the first internal force for each component object in the flexible photovoltaic cable truss structure; according to the modeling parameters of the structural calculation model and the first internal force parameter, determine the structural calculation model in equilibrium corresponding to the flexible photovoltaic cable truss structure, wherein the structure in equilibrium Each component object in the calculation model corresponds to a reference internal force; the first control condition and the second control condition determined according to the target load parameter are obtained, wherein the target load parameter is the load uniform distribution value corresponding to the upper chord under the target load condition, the first control condition is to use the first pressure value of the first target sub-segment as the internal force control condition corresponding to the upper chord, and the second control condition is to use the second pressure value of the second target sub-segment as the internal force control condition corresponding to the lower chord; according to the first control condition and the second control condition, the target internal force corresponding to each component object in the structural calculation model is determined, wherein the target internal force of the component object is determined according to the reference internal force and the target coefficient of the component object, and the target internal force of the cable and the rod is the calculated pretension.

[0040] Step S112 , the server 104 sends the calculation results of the internal force of the flexible photovoltaic cable truss structure to the terminal device 102 through the network 110 .

[0041] remove Figure 1 In addition to the examples shown, the above steps can be completed independently by the client or the server, or by the client and the server working together, such as the terminal device 102 executing the above steps S104, thereby reducing the processing pressure of the server 104. The terminal device 102 includes but is not limited to a handheld device (such as a mobile phone), a laptop computer, a desktop computer, a vehicle-mounted device, etc., and the present application does not limit the specific implementation of the terminal device 102.

[0042] As an optional implementation, Figure 2 As shown, the pre-tension calculation method in the flexible photovoltaic cable truss structure includes:

[0043] S202, obtaining a structural calculation model modeling parameter and a first internal force parameter, wherein the structural calculation model modeling parameter is used to indicate the arch height of the upper chord in the flexible photovoltaic cable truss structure, the flexible photovoltaic cable truss structure includes a cable truss structure, the cable truss structure includes an upper chord and a lower chord, both ends of the upper chord and the lower chord are respectively connected to the column structure, the upper chord and the lower chord are connected by at least one web member, and the first internal force parameter is used to configure a first internal force for each component object in the flexible photovoltaic cable truss structure;

[0044] S204, determining a structural calculation model in a balanced state corresponding to the flexible photovoltaic cable truss structure according to the structural calculation model modeling parameters and the first internal force parameters, wherein each component object in the structural calculation model in a balanced state corresponds to a reference internal force;

[0045] S206, obtaining a first control condition and a second control condition determined according to a target load parameter, wherein the target load parameter is a load uniform distribution value corresponding to the upper chord under the target load condition, the first control condition is to use a first pressure value of the first target subsegment as an internal force control condition corresponding to the upper chord, and the second control condition is to use a second pressure value of the second target subsegment as an internal force control condition corresponding to the lower chord;

[0046] S208, determining the target internal force corresponding to each component object in the structural calculation model according to the first control condition and the second control condition, wherein the target internal force of the component object is determined according to the reference internal force and the target coefficient of the component object.

[0047] As an optional implementation, in step S202, the structural calculation model modeling parameters and the first internal force parameters are obtained, wherein the structural calculation model modeling parameters are used to indicate the arch height of the upper chord in the flexible photovoltaic cable truss structure, the flexible photovoltaic cable truss structure includes a cable truss structure, the cable truss structure includes an upper chord and a lower chord, the ends of the upper chord and the lower chord are respectively connected to the column structure, the upper chord and the lower chord are connected by at least one web member, and the first internal force parameter is used to configure the first internal force for each component object in the flexible photovoltaic cable truss structure. It can be understood that if the target sub-segment of the cable member on the cable truss structure is between point A and point B, and the first internal force parameter is 3N, then the corresponding component object is configured with a first internal force of 3N.

[0048] like Figure 3 The cable truss structure shown includes an upper chord and a lower chord. The upper chord and the lower chord are connected by a web bar. Both ends of the upper chord and the lower chord are connected to columns and tie rods. The modeling parameters of the above structural calculation model are used to indicate the arch height of the upper chord in the flexible photovoltaic cable truss structure, such as Figure 4There are points A, B and D on the cable truss structure shown, point D is the highest point of the upper chord, point B is the lowest point of the lower chord, and the height between point D and point B is the arch height; the above-mentioned first internal force parameters can be used to assign the same first internal force to each component object in the flexible photovoltaic cable truss structure, which can also be understood as the initial internal force on each component object. This is just an example.

[0049] It can be understood that, in step S204, the structural calculation model in equilibrium corresponding to the flexible photovoltaic cable truss structure is determined according to the structural calculation model modeling parameters and the first internal force parameters, wherein each component object in the structural calculation model in equilibrium corresponds to a reference internal force;

[0050] As an optional implementation, the structural calculation model in the flexible photovoltaic cable truss structure can be modeled based on the structural calculation model parameters, including but not limited to the cable truss arch height, cable truss height, cable truss span and other structural parameters, and the first internal force parameters of each component object in the flexible photovoltaic cable truss structure, such as the manually calculated preset initial tension, and the structural calculation model in equilibrium state can be obtained through static calculation, stiffness analysis, and finite element calculation. Without specific restrictions, the above reference internal force is the internal force of each component object calculated in the equilibrium state;

[0051] Then, in step S206, a first control condition and a second control condition determined according to the target load parameter are obtained, wherein the target load parameter is the load uniform distribution value corresponding to the upper chord under the target load condition, the first control condition is to use the first pressure value of the first target subsegment as the internal force control condition corresponding to the upper chord, and the second control condition is to use the second pressure value of the second target subsegment as the internal force control condition corresponding to the lower chord;

[0052] As an optional implementation, the target load parameter is the load uniform distribution value corresponding to the upper chord under the target load condition. The target load condition may be a load condition determined based on factors such as wind load, snow load, and structure deadweight. For example, the target load condition is: when the wind pressure height variation coefficient is u and the wind vibration coefficient is w, the wind load is Q, and the load uniform distribution value corresponding to the upper chord under the target load condition is q;

[0053] Optionally, the first control condition for cable pre-tension is the internal force control condition corresponding to the upper chord when the flexible photovoltaic cable truss structure is in the most unfavorable combination of loads in the gravity direction. For example, the direction of the load uniform distribution value q under the most unfavorable combination of loads in the gravity direction is downward, and the above internal force control condition is: the maximum approximate pressure of the upper chord at the mid-span is N1, and the pre-tension of the upper chord at the mid-span shall not be less than N1; the second control condition for cable pre-tension is the internal force control condition corresponding to the lower chord when the flexible photovoltaic cable truss structure is in the most unfavorable combination of wind suction loads. The above internal force control condition is: the maximum approximate pressure of the lower chord at the mid-span is N2, and the pre-tension of the lower chord at the mid-span shall not be less than N2.

[0054] In the above step S208, the target internal force corresponding to each component object in the structural calculation model is determined according to the first control condition and the second control condition, wherein the target internal force of the component object is determined according to the reference internal force and the target coefficient of the component object.

[0055] As an optional implementation, for example, the reference internal forces of each component object A, B, C, D, and E in the above structural calculation model under equilibrium state are 2N, 4N, 5N, 1N, and 3N respectively, where B is the lower chord cable in the middle span, and C is the upper chord cable in the middle span. According to the above first control condition of cable pretension, N1 is 10N. At this time, the first adjustment coefficient is N1 divided by the reference internal force of the upper chord cable C in the middle span = 10 / 5 = 2. According to the second control condition of cable pretension, N2 is 12N. At this time, the second adjustment coefficient is N2 divided by the reference internal force of the lower chord cable B in the middle span = 12 / 4 = 3. The maximum value of the adjustment coefficients calculated twice is 3 as the target coefficient. The target internal forces of the component objects A, B, C, D, and E are multiplied by the target coefficients, which are 2x3N, 4x3N, 5x3N, 1x3N, 3x3N, i.e., 6N, 12N, 15N, 3N, and 9N, respectively. After obtaining the target internal forces of all components, the target internal forces of the cables and rods are their pretensioning forces.

[0056] Through the above S202-S208, the initial cable pre-tension can be quickly and automatically obtained, which greatly reduces the workload and time of constantly calculating and adjusting the pre-tension, avoids blindness, ensures the rationality of the pre-tension, and greatly reduces structural deformation, solving the technical problems of low accuracy and low efficiency in the calculation of pre-tension in the flexible photovoltaic cable truss structure under the calculation equilibrium state in the existing related technologies.

[0057] As an optional solution, obtaining the first control condition and the second control condition determined according to the target load parameter includes:

[0058] S1, determining the mid-span bending moment of the flexible photovoltaic cable truss structure according to the target load parameter and the cable truss span value of the cable truss structure, wherein the cable truss span value is the distance between the column structures;

[0059] S2, determining a first control condition matching a first target subsegment in the upper chord according to a ratio of the mid-span bending moment to N times the cable truss height, where N is the number of upper chords;

[0060] S3, determining the second control condition matching the second target subsegment in the lower chord according to the ratio of the mid-span bending moment to S times the cable truss height, where S is the number of the lower chord.

[0061] Optionally, in this embodiment, in step S1, the mid-span bending moment of the flexible photovoltaic cable truss structure is determined according to the target load parameter and the cable truss span value of the cable truss structure, wherein the cable truss span value is the distance between the column structures;

[0062] As an optional implementation, the mid-span bending moment can be expressed by the formula M≈qL 2 / 8 calculation, M is the mid-span bending moment, q is the target load parameter, specifically, it can be the load uniform distribution value of the upper chord, and L is the span value of the cable truss, for example, it can be the distance between the cable truss column structures.

[0063] Further, in step S2, a first control condition matching a first target subsegment in the upper chord is determined according to a ratio of the mid-span bending moment to N times the cable truss height, where N is the number of the upper chord;

[0064] Optionally, the first target subsegment in the upper chord may be a mid-span upper chord, and the first control condition may be that the pre-tension of the mid-span upper chord is greater than N1, specifically, N1=M / (nH), H is the cable truss height, and n is the number of upper chords.

[0065] In step S3, a second control condition matching a second target subsegment in the lower chord is determined according to a ratio of the mid-span bending moment to S times the cable truss height, where S is the number of the lower chord;

[0066] Optionally, the second target subsection in the lower chord may be a mid-span lower chord, and the second control condition may be that the pre-tension of the mid-span lower chord is greater than N2, specifically, N2=M / (sH), where s is the number of lower chords.

[0067] Through the embodiments provided in the present application, the mid-span bending moment of the flexible photovoltaic cable truss structure is determined according to the target load parameters and the cable truss span value of the cable truss structure, wherein the cable truss span value is the distance between the column structures; the first control condition matching the first target sub-segment in the upper chord is determined according to the ratio of the mid-span bending moment to N times the cable truss height value, where N is the number of upper chords; the second control condition matching the second target sub-segment in the lower chord is determined according to the ratio of the mid-span bending moment to S times the cable truss height value, where S is the number of lower chords. By determining different stress boundary conditions under different conditions, the accuracy of the model is improved, thereby achieving the technical effect of improving the efficiency of pretension calculation in the flexible photovoltaic cable truss structure.

[0068] As an optional solution, the mid-span bending moment of the flexible photovoltaic cable truss structure is determined according to the target load parameters and the cable truss span value of the cable truss structure, including:

[0069] S1, the product of the target load parameter and the square of the cable truss span value is taken as the first parameter;

[0070] S2, determining the mid-span bending moment of the flexible photovoltaic cable truss structure according to the ratio of the first parameter to the target constant.

[0071] In the above step S1, the product of the target load parameter and the square of the cable truss span value is used as the first parameter. For example, the above first parameter is qL 2 ;

[0072] In the above step S2, the mid-span bending moment of the flexible photovoltaic cable truss structure is determined according to the ratio of the first parameter to the target constant. The above target constant can be 8, which can be derived according to the shear force equation of the integral beam or the energy method, and then the mid-span bending moment M≈qL is determined according to the ratio of the first parameter to the target constant. 2 / 8, it should be noted that q represents the uniform load distribution value of an upper chord. If there are multiple upper chords in the cable truss structure, it is necessary to calculate the uniform load distribution value of all upper chords as q and substitute it into the formula to calculate the mid-span bending moment value;

[0073] As an optional solution, according to the first control condition and the second control condition, the target internal force corresponding to each component object in the structural calculation model is determined, including:

[0074] S1, obtaining a first adjustment coefficient corresponding to a first target subsegment and a second adjustment coefficient corresponding to a second target subsegment in a structural calculation model in a balanced state;

[0075] S2, determining a target coefficient according to the first adjustment coefficient and the second adjustment coefficient;

[0076] S3, determine the product of the reference internal force corresponding to each component object in the structural calculation model in the equilibrium state and the target coefficient as the target internal force corresponding to each component object in the structural calculation model, wherein the first product between the reference internal force and the target coefficient of the first target sub-segment is greater than the first pressure value in the first control condition, and the second product between the reference internal force and the target coefficient of the second target sub-segment is greater than the second pressure value in the second control condition.

[0077] As an optional implementation, the first adjustment coefficient corresponding to the upper chord at the mid-span (first target sub-segment) is 2, and the second adjustment coefficient corresponding to the lower chord at the mid-span (second target sub-segment) is 3. The maximum value 3 of the first adjustment coefficient and the second adjustment coefficient is taken as the target coefficient. This is only an example. Then, multiplication operation is performed based on the target coefficient and the reference internal force of each component object. It should be noted that the first product between the reference internal force of the first target sub-segment and the target coefficient is greater than the first pressure value in the first control condition, and the second product between the reference internal force of the second target sub-segment and the target coefficient is greater than the second pressure value in the second control condition.

[0078] Through the embodiments provided in the present application, a first adjustment coefficient corresponding to the first target sub-segment and a second adjustment coefficient corresponding to the second target sub-segment in the structural calculation model in a balanced state are obtained; the target coefficient is determined according to the first adjustment coefficient and the second adjustment coefficient; the product of the reference internal force corresponding to each component object in the structural calculation model in a balanced state and the target coefficient is determined as the target internal force corresponding to each component object in the structural calculation model, wherein the first product between the reference internal force of the first target sub-segment and the target coefficient is greater than the first pressure value in the first control condition, and the second product between the reference internal force of the second target sub-segment and the target coefficient is greater than the second pressure value in the second control condition, thereby improving the efficiency and accuracy of the pretension calculation in the flexible photovoltaic cable truss structure.

[0079] As an optional solution, before obtaining the first control condition and the second control condition determined according to the target load parameter, the method further includes:

[0080] S1, determining the gravity direction load parameters of the flexible photovoltaic cable truss structure according to the self-weight magnification coefficient of the flexible photovoltaic cable truss structure and the self-weight magnification coefficient of the photovoltaic panel;

[0081] S2, determine the upper wind suction load parameters according to the layout position of the flexible photovoltaic cable truss structure;

[0082] S3, determining the target load parameters according to the gravity direction load parameters and the upward suction load parameters.

[0083] Optionally, in this embodiment, the gravity direction load parameter of the flexible photovoltaic cable truss structure is determined according to the self-weight magnification coefficient of the flexible photovoltaic cable truss structure and the self-weight magnification coefficient of the photovoltaic panel; specifically, the self-weight magnification coefficient is a value greater than 1, which is used to increase the self-weight of the structure when calculating the dead load to consider those weights that may not be fully considered in the preliminary design, and the self-weight magnification coefficient of the photovoltaic panel is a coefficient greater than 1, which is used to consider the weight of the photovoltaic panel and accessories;

[0084] The load parameter in the gravity direction is obtained by adding the result of multiplying the self-weight load of the flexible photovoltaic cable truss structure by the self-weight magnification coefficient and the result of multiplying the photovoltaic panel load by the self-weight magnification coefficient of the photovoltaic panel.

[0085] In S2-S3, the upward wind suction load parameters are determined according to the layout position of the flexible photovoltaic cable truss structure; the target load parameters are determined according to the gravity direction load parameters and the upward wind suction load parameters;

[0086] It should be noted that the standard value of wind load at the installation location, wind pressure height variation coefficient, wind vibration coefficient, body coefficient and ground roughness, etc. can be determined according to the building structure load code, and the upper suction load parameter can be further determined according to the above parameters. The target load parameter is determined according to the difference between the gravity direction load parameter and the upper suction load parameter. Specifically, the target load parameter is the uniformly distributed load value of the upper chord.

[0087] The load of the flexible photovoltaic cable truss structure can also be determined based on other parameters. For example, when the temperature effect is ignored, the importance coefficient of the flexible photovoltaic cable truss structure can be selected as 1 to ensure the safety of the structure.

[0088] As an optional solution, according to the structural calculation model modeling parameters and the first internal force parameters, a structural calculation model in a balanced state corresponding to the flexible photovoltaic cable truss structure is determined, including:

[0089] S1, obtaining a cable truss height value indicating a structural height of the cable truss structure;

[0090] S2, determining the geometric relationship between each component object in the structural calculation model according to the cable truss height value and the modeling parameters of the structural calculation model;

[0091] S3, configuring a first internal force for a target component unit in the structural calculation model according to the first internal force parameter;

[0092] S4, determining a structural calculation model in a balanced state according to the first internal force.

[0093] Optionally, in steps S1-S2 of this embodiment, a cable truss height value indicating the structural height of the cable truss structure is obtained; and a geometric relationship between each component object in the structural calculation model is determined according to the cable truss height value and a modeling parameter of the structural calculation model;

[0094] As an optional implementation, the height of the cable truss can be determined according to the deployment environment of the flexible photovoltaic cable truss structure. For example, when the flexible photovoltaic cable truss structure is deployed in a wind-resistant environment, the appropriate height can be determined according to factors such as the structural stiffness, wind resistance, and vortex-vibration characteristics of the cable truss structure; the relationship between the various component objects in the structural calculation model can be determined according to the cable truss height value and the modeling parameters of the structural calculation model, including but not limited to the cable truss arch height and the cable truss span. Figure 3 The geometric relationships shown include, but are not limited to, connection relationships between various component objects (such as clamping, steering, sliding, etc.), or various combinations of components (such as fish-belly cable trusses, radial cable trusses, spoke cable trusses, string-type structures, cable-stayed structures, etc.), and no specific restrictions are made here.

[0095] In the above steps S3-S5, a first internal force is configured for a target component unit in the structural calculation model according to the first internal force parameter; and a structural calculation model in a balanced state is determined according to the first internal force;

[0096] Optionally, the target component unit may be a cable or rod unit. For example, the structural designer configures the first internal force for the target component unit in the structural calculation model according to the first internal force parameter, such as obtaining the parameter value in the first internal force parameter, and configuring the first internal force as the corresponding component unit. Specifically, the cable or rod unit may be regarded as a compressible two-force rod, and the first internal force may be assigned to the cable or rod unit. The first internal force may also be configured for all component objects, and no limitation is made here.

[0097] According to the above-mentioned first internal force, a structural calculation model in a state of equilibrium is determined through structural force analysis, finite element calculation, etc., including but not limited to iterative calculation, in which the internal force and deformation state of the structure are updated in each iteration to determine the structural calculation model in a state of equilibrium.

[0098] By obtaining the cable truss height value indicating the structural height of the cable truss structure; determining the geometric relationship between each component object in the structural calculation model according to the cable truss height value and the modeling parameters of the structural calculation model; configuring the first internal force for the target component unit in the structural calculation model according to the first internal force parameter; determining the structural calculation model in equilibrium according to the first internal force; and accurately obtaining the accuracy of the physical model corresponding to the flexible photovoltaic cable truss structure, thereby improving the accuracy of the calculated component internal force, thereby achieving improved internal force acquisition efficiency and internal force calculation accuracy in the flexible photovoltaic cable truss structure.

[0099] As an optional solution, according to the structural calculation model configured with the first internal force, determining the structural calculation model in a balanced state includes:

[0100] S1, determining a second internal force of each component object in the structural calculation model according to the first internal force;

[0101] S2, when the difference between the second internal force and the first internal force corresponding to each component object does not meet the target condition, the second internal force corresponding to each component object in the structural calculation model is used as the first internal force, and the structural displacement is reset to zero, and the structural calculation is performed again, and this step is repeated until the difference between the second internal force and the first internal force corresponding to each component object meets the target condition;

[0102] S3, when the difference between the second internal force and the first internal force corresponding to each component object meets the target condition, the second internal force corresponding to each component object in the structural calculation model is determined as the reference internal force.

[0103] Optionally, in step S1, the second internal force of each component object in the structural calculation model is determined according to the first internal force; the second internal force of the component object can be determined by using finite element analysis, solving linear equations, and performing an inverse operation of a stiffness matrix.

[0104] In the above step S2, when the difference between the second internal force and the first internal force corresponding to each component object does not meet the target condition, the second internal force corresponding to each component object in the structural calculation model is used as the first internal force, and the structural displacement is reset to zero, and the structural calculation is performed again. This step is repeated until the difference between the second internal force and the first internal force corresponding to each component object meets the target condition.

[0105] As an optional implementation, for example: the first internal forces of components A, B, and C in the structural calculation model are 2N, 3N, and 4N, and the first internal forces of cables and rods are 8N. According to the first internal forces of the above components, the second internal forces of components A, B, and C in each component are calculated to be 6N, 4N, and 9N, and the second internal forces of cables and rods are 15N. The displacement values ​​are all 2m. Assuming that the difference between the second internal force and the first internal force between the components does not meet the target conditions, the displacement value of the component is reset to zero, and the second internal force is used as the first internal force to calculate the internal force of the component in the structural model again.

[0106] Furthermore, in the above step S3, when the difference between the second internal force and the first internal force corresponding to each component object satisfies the target condition, the second internal force corresponding to each component object in the structural calculation model is determined as the reference internal force;

[0107] Assuming that the difference between the second internal force and the first internal force between the components meets the target condition, the second internal force value of each component is obtained as the reference internal force, without specific limitation.

[0108] Through the above-mentioned implementation mode recorded in the present application, the second internal force of each component object in the structural calculation model is determined according to the first internal force; when the difference value between the second internal force corresponding to each component object and the first internal force does not meet the target condition, the second internal force corresponding to each component object in the structural calculation model is used as the first internal force, and the structural displacement is reset to zero, and the structural calculation is performed again, and this step is repeated until the difference value between the second internal force corresponding to each component object and the first internal force meets the target condition; when the difference value between the second internal force corresponding to each component object and the first internal force meets the target condition, the second internal force corresponding to each component object in the structural calculation model is determined as the reference internal force, thereby improving the internal force acquisition efficiency and display accuracy in the flexible photovoltaic cable truss structure.

[0109] The present invention is described in a specific implementation manner as follows. Figure 5 As shown:

[0110] S502, change the unit type, amplify the component stiffness, and give the unit initial internal force;

[0111] Specifically, first determine the appropriate arch height of the upper chord, and then establish the initial equilibrium state shape (in this state, there is only pretension, no other loads including deadweight, and the unit length is the blanking length. It should be noted that when the internal force value is positive, the internal force is the pretension, and when the internal force value is negative, the internal force is the precompression). The ratio of the cable truss arch height to the cable truss height is recommended to be no less than 1 / 5. The schematic diagram of the geometric model is shown in the figure. Figure 3 As shown;

[0112] When automatically calculating the pretension, the program converts each cable and rod unit into a compressible two-force rod, and the stiffness of each component is magnified by the same multiple (for example, 5 times, in order to accelerate the convergence of iterative calculation), and each unit is given the same internal force (for example, 1000kN);

[0113] S504, overall structural calculation: the internal force of each component is calculated based on the initial internal force assigned to each unit in S502.

[0114] S506, the internal force of the component obtained by the overall structure calculation is used as the initial internal force of the unit, and the displacement of each node is reset to zero;

[0115] S508, performing overall structural calculation again;

[0116] S510, determine whether the change in the internal force of the component obtained by two calculations is less than 1%?

[0117] Furthermore, the calculation is terminated when the change of the internal force of the component obtained by the two calculations is less than 1%;

[0118] If the internal force of the component obtained by the two calculations does not change by less than 1%, execute S506-S510 to judge again;

[0119] That is, the above steps will assign the calculated internal forces of each component as the initial internal forces to each unit again, and the displacement of each node will be reset to zero, and the new internal forces of the components will be recalculated. Repeat this process, assigning the new internal forces to each unit as the initial internal forces and reset the displacement of each node to zero each time, until the internal forces are basically stable, for example, the difference in the internal forces of components at the same position calculated twice in a row is less than 1%. At this time, the internal force distribution ratio of each component in the initial equilibrium state can be obtained (the internal forces in this state are magnified or reduced by the same multiple, and the entire structure is still in a state of internal force balance, and the displacement of each node is basically zero).

[0120] As an optional implementation, assuming that the load uniform distribution value of the upper chord under a certain load combination is q, the cable truss can be approximated as a simply supported beam at both ends, the cable truss span is L, the cable truss height at the mid-span is H, and the mid-span bending moment is M; when q is downward, the maximum approximate pressure of the upper chord under this load combination can be obtained as N1=M / (nH), where H is the height of the cable truss and n is the number of upper chords; when q is upward, the maximum approximate pressure of the lower chord under this load combination can be obtained as N2=M / (nH), where H is the height of the cable truss and n is the number of lower chords;

[0121] By multiplying the internal forces of each component in the initial equilibrium state by appropriate multiples, the pretension of the upper chord in the mid-span is greater than N1, and the pretension of the lower chord in the mid-span is greater than N2 under each load combination, thereby obtaining the internal forces of each component in the initial equilibrium state.

[0122] As an optional implementation, the operation process of the internal force acquisition method in the flexible photovoltaic cable truss structure of this solution is as follows:

[0123] First execute the parametric modeling command, such as Figure 6 Enter the model parameters in the dialog box shown;

[0124] It should be noted that the arch height parameter determines the shape of the initial equilibrium state, and the ratio of the arch height to the cable truss height should not be too small, otherwise the estimated upper chord pretension will be too large. After inputting the parameters of each engineering structure, the initial geometric model will be generated.

[0125] Adjust the relevant parameters that affect the structural load as needed. The adjustment interface is as follows: Figure 7 As shown;

[0126] Click the "Estimate Initial Tension" function in the interface and check the model information interface as shown Figure 8 In the "Pre-tension" of the unit information, click the OK control to calculate and display the calculated pre-tension according to the internal force acquisition method in the flexible photovoltaic cable truss structure recorded in this application.

[0127] Through the embodiments provided in the present application, the initial cable pretension can be quickly and automatically obtained, which greatly reduces the workload and time of constantly calculating and adjusting the pretension, avoids blindness, ensures the rationality of the pretension, and greatly reduces structural deformation.

[0128] It should be noted that, for the aforementioned method embodiments, for the sake of simplicity, they are all expressed as a series of action combinations, but those skilled in the art should be aware that the present application is not limited by the described order of actions, because according to the present application, certain steps can be performed in other orders or simultaneously. Secondly, those skilled in the art should also be aware that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily required by the present application.

[0129] According to another aspect of the embodiment of the present application, a pre-tension calculation device in a flexible photovoltaic cable truss structure for implementing the pre-tension calculation method in the flexible photovoltaic cable truss structure is also provided. Fig. 9 As shown, the device comprises:

[0130] A first acquisition unit 902 is used to acquire a modeling parameter of a structural calculation model and a first internal force parameter, wherein the modeling parameter of the structural calculation model is used to indicate the arch height of an upper chord in a flexible photovoltaic cable truss structure, the flexible photovoltaic cable truss structure includes a cable truss structure, the cable truss structure includes an upper chord and a lower chord, both ends of the upper chord and the lower chord are respectively connected to the column structure, and the upper chord and the lower chord are connected by at least one web member, and the first internal force parameter is used to configure a first internal force for each component object in the flexible photovoltaic cable truss structure;

[0131] A first determining unit 904 determines a structural calculation model in a balanced state corresponding to the flexible photovoltaic cable truss structure according to the structural calculation model modeling parameters and the first internal force parameters, wherein each component object in the structural calculation model in a balanced state corresponds to a reference internal force;

[0132] The second acquisition unit 906 acquires a first control condition and a second control condition determined according to a target load parameter, wherein the target load parameter is a load uniform distribution value corresponding to the upper chord under the target load condition, the first control condition is to use a first pressure value of the first target subsegment as an internal force control condition corresponding to the upper chord, and the second control condition is to use a second pressure value of the second target subsegment as an internal force control condition corresponding to the lower chord;

[0133] The second determination unit 908 determines the target internal force corresponding to each component object in the structural calculation model according to the first control condition and the second control condition, wherein the target internal force of the component object is determined according to the reference internal force and the target coefficient of the component object. For specific embodiments, reference may be made to the example shown in the pretension calculation method in the flexible photovoltaic cable truss structure, which will not be repeated in this example.

[0134] According to another aspect of the embodiment of the present application, an electronic device for implementing the pre-tension calculation method in the above-mentioned flexible photovoltaic cable truss structure is also provided. Fig.10 As shown, the electronic device includes a memory 1002 and a processor 1004. The memory 1002 stores a computer program, and the processor 1004 is configured to execute the steps in any of the above method embodiments through the computer program.

[0135] Optionally, in this embodiment, the electronic device may be located in at least one network device among a plurality of network devices of a computer network.

[0136] Optionally, in this embodiment, the processor may be configured to perform the following steps through a computer program:

[0137] S1, obtaining a structural calculation model modeling parameter and a first internal force parameter, wherein the structural calculation model modeling parameter is used to indicate the arch height of the upper chord in the flexible photovoltaic cable truss structure, the flexible photovoltaic cable truss structure includes a cable truss structure, the cable truss structure includes an upper chord and a lower chord, both ends of the upper chord and the lower chord are respectively connected to the column structure, and the upper chord and the lower chord are connected by at least one web member, and the first internal force parameter is used to configure a first internal force for each component object in the flexible photovoltaic cable truss structure;

[0138] S2, determining a structural calculation model in a balanced state corresponding to the flexible photovoltaic cable truss structure according to the structural calculation model modeling parameters and the first internal force parameters, wherein each component object in the structural calculation model in a balanced state corresponds to a reference internal force;

[0139] S3, obtaining a first control condition and a second control condition determined according to a target load parameter, wherein the target load parameter is a load uniform distribution value corresponding to the upper chord under the target load condition, the first control condition is to use a first pressure value of the first target subsegment as an internal force control condition corresponding to the upper chord, and the second control condition is to use a second pressure value of the second target subsegment as an internal force control condition corresponding to the lower chord;

[0140] S4, determining the target internal force corresponding to each component object in the structural calculation model according to the first control condition and the second control condition, wherein the target internal force of the component object is determined according to the reference internal force and the target coefficient of the component object.

[0141] Alternatively, a person skilled in the art may understand that: Fig.10 The components shown are for illustration only, and the electronic device may also be a smart phone (such as an Android phone, an iOS phone, etc.), a tablet computer, a PDA, a mobile Internet device (MID), a PAD, or other terminal equipment. Fig.10 It does not limit the components of the electronic device. For example, the electronic device may also include Fig.10 More or fewer components (such as network interfaces, etc.) as shown in, or with Fig.10 Different configurations are shown.

[0142] Among them, the memory 1002 can be used to store software programs and modules, such as the program instructions / modules corresponding to the pre-tension calculation method and device in the flexible photovoltaic cable truss structure in the embodiment of the present application. The processor 1004 executes various functional applications and data processing by running the software programs and modules stored in the memory 1002, that is, to realize the above-mentioned pre-tension calculation method in the flexible photovoltaic cable truss structure. The memory 1002 may include a high-speed random access memory, and may also include a non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some instances, the memory 1002 may further include a memory remotely arranged relative to the processor 1004, and these remote memories may be connected to the terminal via a network. Examples of the above-mentioned networks include but are not limited to the Internet, corporate intranets, local area networks, mobile communication networks, and combinations thereof. Among them, the memory 1002 can be specifically but not limited to being used for information such as target determination requests and target sending requests. As an example, Fig.10 As shown, the memory 1002 may include, but is not limited to, the first acquisition unit 902, the first determination unit 904, the second acquisition unit 906, and the second determination unit 908 in the pre-tension calculation device in the flexible photovoltaic cable truss structure. In addition, it may also include, but is not limited to, other module units in the pre-tension calculation device in the flexible photovoltaic cable truss structure, which will not be repeated in this example.

[0143] Optionally, the transmission device 1006 is used to receive or send data via a network. Specific examples of the above-mentioned network may include a wired network and a wireless network. In one example, the transmission device 1006 includes a network adapter (Network Interface Controller, NIC), which can be connected to other network devices and routers via a network cable so as to communicate with the Internet or a local area network. In one example, the transmission device 1006 is a radio frequency (RF) module, which is used to communicate with the Internet wirelessly.

[0144] In addition, the electronic device further includes: a display 1008 for displaying information such as the target determination request and the target sending request; and a connection bus 1010 for connecting various module components in the electronic device.

[0145] In other embodiments, the terminal device or server may be a node in a distributed system, wherein the distributed system may be a blockchain system, and the blockchain system may be a distributed system formed by connecting the multiple nodes through network communication. Among them, the nodes may form a peer-to-peer (P2P) network, and any form of computing device, such as a server, terminal or other electronic device, may become a node in the blockchain system by joining the peer-to-peer network.

[0146] According to one aspect of the present application, a computer program product is provided, the computer program product comprising a computer program / instruction, the computer program / instruction comprising a program code for executing the method shown in the flow chart. In such an embodiment, the computer program can be downloaded and installed from a network through a communication part, and / or installed from a removable medium. When the computer program is executed by a central processing unit, various functions provided by the embodiments of the present application are executed.

[0147] The serial numbers of the above-mentioned embodiments of the present application are for description only and do not represent the advantages or disadvantages of the embodiments.

[0148] It should be noted that the computer system of the electronic device is only an example and should not bring any limitation to the functions and scope of use of the embodiments of the present application.

[0149] The computer system includes a central processing unit (CPU), which can perform various appropriate actions and processes according to the program stored in the read-only memory (ROM) or the program loaded from the storage part to the random access memory (RAM). In the random access memory, various programs and data required for system operation are also stored. The central processing unit, the read-only memory and the random access memory are connected to each other through a bus. The input / output interface (I / O interface) is also connected to the bus.

[0150] The following components are connected to the input / output interface: an input part including a keyboard, a mouse, etc.; an output part including a cathode ray tube (CRT), a liquid crystal display (LCD), etc., and a speaker; a storage part including a hard disk, etc.; and a communication part including a network interface card such as a local area network card, a modem, etc. The communication part performs communication processing via a network such as the Internet. A drive is also connected to the input / output interface as needed. Removable media, such as a magnetic disk, an optical disk, a magneto-optical disk, a semiconductor memory, etc., are installed on the drive as needed so that the computer program read therefrom is installed into the storage part as needed.

[0151] In particular, according to an embodiment of the present application, the process described in each method flow chart can be implemented as a computer software program. For example, an embodiment of the present application includes a computer program product, which includes a computer program carried on a computer readable medium, and the computer program contains a program code for executing the method shown in the flow chart. In such an embodiment, the computer program can be downloaded and installed from a network through a communication part, and / or installed from a removable medium. When the computer program is executed by a central processing unit, various functions defined in the system of the present application are executed.

[0152] Optionally, the second acquisition unit includes: a third determination unit, used to determine the mid-span bending moment of the flexible photovoltaic cable truss structure according to the target load parameters and the cable truss span value of the cable truss structure, wherein the cable truss span value is the distance between the column structures; determine a first control condition matching a first target sub-segment in the upper chord according to the ratio of the mid-span bending moment to N times the cable truss height value, where N is the number of roots of the upper chord; determine a second control condition matching a second target sub-segment in the lower chord according to the ratio of the mid-span bending moment to S times the cable truss height value, where S is the number of roots of the lower chord.

[0153] Optionally, the third determination unit includes: a fourth determination unit, used to take the product of the target load parameter and the square of the cable truss span value as the first parameter; and determine the mid-span bending moment of the flexible photovoltaic cable truss structure according to the ratio of the first parameter to the target constant.

[0154] Optionally, the above-mentioned first determination unit includes: a fifth determination unit, used to obtain a first adjustment coefficient corresponding to a first target sub-segment in the structural calculation model in an equilibrium state, and a second adjustment coefficient corresponding to a second target sub-segment; determine the target coefficient according to the first adjustment coefficient and the second adjustment coefficient; determine the product of the reference internal force corresponding to each component object in the structural calculation model in an equilibrium state and the target coefficient as the target internal force corresponding to each component object in the structural calculation model, wherein the first product between the reference internal force of the first target sub-segment and the target coefficient is greater than the first pressure value in the first control condition, and the second product between the reference internal force of the second target sub-segment and the target coefficient is greater than the second pressure value in the second control condition.

[0155] Optionally, the above-mentioned first determination unit also includes: a sixth determination unit, which is used to determine the gravity direction load parameters of the flexible photovoltaic cable truss structure according to the self-weight magnification coefficient of the flexible photovoltaic cable truss structure and the self-weight magnification coefficient of the photovoltaic panel; determine the upper wind suction load parameters according to the layout position of the flexible photovoltaic cable truss structure; determine the target load parameters according to the gravity direction load parameters and the upper wind suction load parameters.

[0156] Optionally, the above-mentioned second determination unit includes a seventh determination unit, which is used to obtain a cable truss height value indicating the structural height of the cable truss structure; determine the geometric relationship between each component object in the structural calculation model according to the cable truss height value and the modeling parameters of the structural calculation model; configure the first internal force for the target component unit in the structural calculation model according to the first internal force parameter; and determine the structural calculation model in a balanced state according to the first internal force.

[0157] Optionally, the seventh determination unit includes an eighth determination unit, which is used to determine the second internal force of each component object in the structural calculation model according to the first internal force; when the difference between the second internal force corresponding to each component object and the first internal force does not meet the target condition, the second internal force corresponding to each component object in the structural calculation model is used as the first internal force, and the structural displacement is reset to zero, and the structural calculation is performed again, and this step is repeated until the difference between the second internal force corresponding to each component object and the first internal force meets the target condition; when the difference between the second internal force corresponding to each component object and the first internal force meets the target condition, the second internal force corresponding to each component object in the structural calculation model is determined as the reference internal force.

[0158] According to one aspect of the present application, a computer-readable storage medium is provided, and a processor of a computer device reads the computer instructions from the computer-readable storage medium, and the processor executes the computer instructions, so that the computer device executes the methods provided in the above-mentioned various optional implementations.

[0159] Optionally, in this embodiment, the computer-readable storage medium may be configured to store a computer program for performing the following steps:

[0160] S1, obtaining a structural calculation model modeling parameter and a first internal force parameter, wherein the structural calculation model modeling parameter is used to indicate the arch height of the upper chord in the flexible photovoltaic cable truss structure, the flexible photovoltaic cable truss structure includes a cable truss structure, the cable truss structure includes an upper chord and a lower chord, both ends of the upper chord and the lower chord are respectively connected to the column structure, and the upper chord and the lower chord are connected by at least one web member, and the first internal force parameter is used to configure a first internal force for each component object in the flexible photovoltaic cable truss structure;

[0161] S2, determining a structural calculation model in a balanced state corresponding to the flexible photovoltaic cable truss structure according to the structural calculation model modeling parameters and the first internal force parameters, wherein each component object in the structural calculation model in a balanced state corresponds to a reference internal force;

[0162] S3, obtaining a first control condition and a second control condition determined according to a target load parameter, wherein the target load parameter is a load uniform distribution value corresponding to the upper chord under the target load condition, the first control condition is to use a first pressure value of the first target subsegment as an internal force control condition corresponding to the upper chord, and the second control condition is to use a second pressure value of the second target subsegment as an internal force control condition corresponding to the lower chord;

[0163] S4, determining the target internal force corresponding to each component object in the structural calculation model according to the first control condition and the second control condition, wherein the target internal force of the component object is determined according to the reference internal force and the target coefficient of the component object.

[0164] Optionally, in this embodiment, a person of ordinary skill in the art may understand that all or part of the steps in the various methods of the above embodiments may be completed by instructing hardware related to the terminal device through a program, and the program may be stored in a computer-readable storage medium, and the storage medium may include: a flash drive, a read-only memory (ROM), a random access memory (RAM), a disk or an optical disk, etc.

[0165] The serial numbers of the above-mentioned embodiments of the present application are for description only and do not represent the advantages or disadvantages of the embodiments.

[0166] If the integrated units in the above embodiments are implemented in the form of software functional units and sold or used as independent products, they can be stored in the above computer-readable storage medium. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for enabling one or more computer devices (which may be personal computers, servers, or network devices, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present application.

[0167] In the above embodiments of the present application, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, please refer to the relevant description of other embodiments.

[0168] In the several embodiments provided in the present application, it should be understood that the disclosed client can be implemented in other ways. Among them, the device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of units or modules, which can be electrical or other forms.

[0169] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0170] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0171] The above is only a preferred implementation of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. A method for calculating pre-tension in a flexible photovoltaic cable truss structure, characterized in that: include: Acquire a structural calculation model modeling parameter and a first internal force parameter, wherein the structural calculation model modeling parameter is used to indicate the arch height of the upper chord in the flexible photovoltaic cable truss structure, the flexible photovoltaic cable truss structure includes a cable truss structure, the cable truss structure includes an upper chord and a lower chord, both ends of the upper chord and the lower chord are respectively connected to the column structure, the upper chord and the lower chord are connected by at least one web member, and the first internal force parameter is used to configure a first internal force for each component object in the flexible photovoltaic cable truss structure; Determine a structural calculation model in equilibrium corresponding to the flexible photovoltaic cable truss structure according to the structural calculation model modeling parameters and the first internal force parameters, wherein each component object in the structural calculation model in equilibrium corresponds to a reference internal force; Acquire a first control condition and a second control condition determined according to a target load parameter, wherein the target load parameter is a load uniform distribution value corresponding to the upper chord under the target load condition, the first control condition is to use a first pressure value of a first target subsegment as an internal force control condition corresponding to the upper chord, and the second control condition is to use a second pressure value of a second target subsegment as an internal force control condition corresponding to the lower chord; According to the first control condition and the second control condition, the target internal force corresponding to each of the component objects in the structural calculation model is determined, wherein the target internal force of the component object is determined according to the reference internal force of the component object and the target coefficient.

2. The method according to claim 1, characterized in that The obtaining of the first control condition and the second control condition determined according to the target load parameter comprises: Determining the mid-span bending moment of the flexible photovoltaic cable truss structure according to the target load parameter and the cable truss span value of the cable truss structure, wherein the cable truss span value is the distance between the column structures; Determining the first control condition matching the first target subsegment in the upper chord according to the ratio of the mid-span bending moment to N times the cable truss height, where N is the number of upper chords; The second control condition matching the second target subsegment in the lower cable chord is determined according to the ratio of the mid-span bending moment to S times the cable truss height, where S is the number of lower cable chords.

3. The method according to claim 2, characterized in that The determining the mid-span bending moment of the flexible photovoltaic cable truss structure according to the target load parameter and the cable truss span value of the cable truss structure comprises: The product of the target load parameter and the square of the cable truss span value is taken as the first parameter; The mid-span bending moment of the flexible photovoltaic cable truss structure is determined according to the ratio of the first parameter to the target constant.

4. The method according to claim 2, characterized in that Determining the target internal force corresponding to each of the component objects in the structural calculation model according to the first control condition and the second control condition includes: Acquire a first adjustment coefficient corresponding to the first target subsegment and a second adjustment coefficient corresponding to the second target subsegment in the structural calculation model in the equilibrium state; Determine the target coefficient according to the first adjustment coefficient and the second adjustment coefficient; The product of the reference internal force corresponding to each of the component objects in the structural calculation model in the equilibrium state and the target coefficient is determined as the target internal force corresponding to each of the component objects in the structural calculation model, wherein a first product between the reference internal force and the target coefficient of the first target subsegment is greater than the first pressure value in the first control condition, and a second product between the reference internal force and the target coefficient of the second target subsegment is greater than the second pressure value in the second control condition.

5. The method according to claim 2, characterized in that: Before obtaining the first control condition and the second control condition determined according to the target load parameter, the method further includes: Determining the gravity direction load parameter of the flexible photovoltaic cable truss structure according to the self-weight magnification coefficient of the flexible photovoltaic cable truss structure and the self-weight magnification coefficient of the photovoltaic panel; Determining the upper wind suction load parameter according to the layout position of the flexible photovoltaic cable truss structure; The target load parameter is determined according to the gravity direction load parameter and the upward suction load parameter.

6. The method according to claim 1, characterized in that The step of determining a structural calculation model in a balanced state corresponding to the flexible photovoltaic cable truss structure according to the structural calculation model modeling parameters and the first internal force parameters includes: obtaining a cable truss height value indicating a structural height of the cable truss structure; Determine the geometric relationship between each of the component objects in the structural calculation model according to the cable truss height value and the modeling parameters of the structural calculation model; configuring a first internal force for a target component unit in the structural calculation model according to the first internal force parameter; The structural calculation model in a balanced state is determined according to the first internal force.

7. The method according to claim 6, characterized in that Determining the structural calculation model in a balanced state according to the structural calculation model configured with the first internal force includes: Determine a second internal force of each of the component objects in the structural calculation model according to the first internal force; In the case where the difference between the second internal force and the first internal force corresponding to each of the component objects does not meet the target condition, the second internal force corresponding to each of the component objects in the structural calculation model is used as the first internal force, and the structural displacement is reset to zero, and the structural calculation is performed again, and this step is repeated until the difference between the second internal force and the first internal force corresponding to each of the component objects meets the target condition; In the case where the difference between the second internal force and the first internal force corresponding to each of the component objects satisfies the target condition, the second internal force corresponding to each of the component objects in the structural calculation model is determined as the reference internal force.

8. A pre-tension calculation device in a flexible photovoltaic cable truss structure, characterized in that: include: A first acquisition unit is configured to acquire a modeling parameter of a structural calculation model and a first internal force parameter, wherein the modeling parameter of the structural calculation model is used to indicate an arch height of an upper chord in a flexible photovoltaic cable truss structure, wherein the flexible photovoltaic cable truss structure includes a cable truss structure, wherein the cable truss structure includes an upper chord and a lower chord, wherein both ends of the upper chord and the lower chord are respectively connected to a column structure, and the upper chord and the lower chord are connected to each other through at least one web member, and the first internal force parameter is used to configure a first internal force for each member object in the flexible photovoltaic cable truss structure; A first determining unit determines a structural calculation model in a balanced state corresponding to the flexible photovoltaic cable truss structure according to the structural calculation model modeling parameters and the first internal force parameters, wherein each component object in the structural calculation model in a balanced state corresponds to a reference internal force; a second acquisition unit, acquiring a first control condition and a second control condition determined according to a target load parameter, wherein the target load parameter is a load uniform distribution value corresponding to the upper chord under the target load condition, the first control condition is to use a first pressure value of a first target subsegment as an internal force control condition corresponding to the upper chord, and the second control condition is to use a second pressure value of a second target subsegment as an internal force control condition corresponding to the lower chord; The second determination unit determines the target internal force corresponding to each of the component objects in the structural calculation model according to the first control condition and the second control condition, wherein the target internal force of the component object is determined according to the reference internal force and the target coefficient of the component object.

9. A computer-readable storage medium, characterized in that: The computer-readable storage medium includes a stored program, wherein the program executes the method described in any one of claims 1 to 7 when executed by an electronic device.

10. An electronic device comprising a memory and a processor, characterized in that: A computer program is stored in the memory, and the processor is configured to execute the method according to any one of claims 1 to 7 through the computer program.

11. A computer program product, comprising a computer program, characterized in that When the computer program is executed by a processor, the steps of the method described in any one of claims 1 to 7 are implemented.

Images