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

Abstract

The present application discloses a method, device, storage medium, and electronic device for calculating pretension in a flexible photovoltaic cable truss structure. The method for calculating pretension in the flexible photovoltaic cable truss structure comprises: obtaining a structural calculation model parameter and a first internal force parameter; determining a structural calculation model in equilibrium corresponding to the flexible photovoltaic cable truss structure based on the structural calculation model parameter and the first internal force parameter; obtaining a first control condition and a second control condition determined based on a target load parameter; and determining a target internal force corresponding to each component object in the structural calculation model based on the first control condition and the second control condition, wherein the target internal force of the component object is determined based on a reference internal force and a target coefficient of the component object. The present application solves the technical problems in the related art of low efficiency and inaccurate pretension calculation in flexible photovoltaic cable truss structures.

Description

Technical Field

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

[0002] Calculating the pretension of flexible photovoltaic support structures is a critical engineering and technical issue, crucial for ensuring the wind-resistant stiffness of the entire structural system. If the pretension is too low, deformation under design conditions may not meet requirements, weakening the structural system's wind resistance. Excessive pretension, on the other hand, may cause the cable structure's ultimate cable force to exceed its allowable breaking strength, increasing the stress on the end supports under extreme conditions and the associated end support foundation costs.

[0003] Currently, the common method for calculating the pretension of flexible photovoltaic cable truss structures is to adjust the trial calculation method. This method has the following disadvantages:

[0004] First, the workload of repeated adjustment calculations 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 cable and rod pre-tension is not clear, and the cable and rod pre-tension adjustment is blind. Different adjustment processes may produce different adjustment results.

[0006] Third, there are inconsistencies in the cable pre-tensions adjusted under various working conditions. For example, the cable tension adjusted for a gravity load combination often cannot guarantee suitability for an upward wind load combination.

[0007] To address the above-mentioned problems, no effective solutions have been proposed so far. 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 in calculating pre-tension 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 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 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 an equilibrium state is obtained, wherein each component object in the structural calculation model in an equilibrium 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 uniformly distributed load 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 the 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 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 of the component object and the target coefficient.

[0010] According to another aspect of the embodiment of the present application, a pre-tension calculation device in a flexible photovoltaic cable truss structure is also provided, including: a first acquisition unit, which acquires structural calculation model modeling parameters and first internal force parameters, 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; a first determination unit, which determines the horizontal position corresponding to the flexible photovoltaic cable truss structure according to the structural calculation model modeling parameters and the first internal force parameters. A structural calculation model in an equilibrium state, wherein each component object in the structural calculation model in an equilibrium state corresponds to a reference internal force; a second acquisition unit obtains a first control condition and a second control condition determined according to a target load parameter, wherein the target load parameter is a uniformly distributed load 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 sub-segment as the 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 sub-segment as the internal force control condition corresponding to the lower chord; a second determination unit 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 of the component object and the target coefficient.

[0011] Optionally, the above-mentioned 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 the first control condition for matching the 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 the second control condition for matching the 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, configured 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 the first target sub-segment in the structural calculation model in the equilibrium state, and a second adjustment coefficient corresponding to the second target sub-segment; determine the target coefficient based on 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 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 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 based on 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 suction load parameters according to the layout position of the flexible photovoltaic cable truss structure; and determine the target load parameters based on the gravity direction load parameters and the upper 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 for 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 an equilibrium state according to the first internal force.

[0016] Optionally, the above-mentioned 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 based on 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.

[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 an embodiment of the present application, a computer program product or computer program is provided, comprising computer instructions stored in a computer-readable storage medium. A processor of a computer device reads the computer instructions from the computer-readable storage medium and executes the computer instructions, causing the computer device to perform the above-described method for calculating pretension in a flexible photovoltaic cable truss structure.

[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 above-mentioned 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, 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 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 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 uniformly distributed load 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; based on 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 of the component object and the target coefficient.

[0021] By using the pre-tension calculation method in the above-mentioned flexible photovoltaic cable truss structure, by obtaining the structural calculation model modeling parameters and the first internal force parameters, 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, 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 internal force of the flexible photovoltaic cable truss according to the structural calculation model modeling parameters and the first internal force parameters. A structural calculation model in equilibrium state corresponding to the frame structure is provided, wherein each component object in the structural calculation model in equilibrium state corresponds to a reference internal force, and the first control condition and the second control condition determined according to the target load parameter 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 the pretensioning force calculation in the flexible photovoltaic cable truss structure, and thus solving the technical problems of low efficiency in obtaining internal force 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 following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0024] Figure 1 is a schematic diagram of the hardware environment 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] Figure 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] Figure 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 present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of this 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 sequential order. 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 a sequence 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 the embodiment of the present application, a method for calculating pre-tension in a flexible photovoltaic cable truss structure is provided. Optionally, as an optional embodiment, the pre-tension calculation method in the 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 to and communicates with the server 104 via the network 110. The network may include, but is not limited to, a wired network and a wireless network. The wired network includes a local area network, a metropolitan area network, and a wide area network. The wireless network includes Bluetooth, WIFI, and other networks that implement wireless communication. The terminal device may include, but is not limited to, at least one of the following: a mobile phone (such as an Android phone, an iOS phone, etc.), a laptop, a tablet computer, a PDA, an MID (Mobile Internet Device), a PAD, a desktop computer, a smart TV, a vehicle-mounted device, etc. The terminal device 102 may include, but is not limited to, a display, a processor, and a memory. The server 104 may be a single server, a server cluster consisting of multiple servers, or a cloud server. The 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 via the network 110 ;

[0039] Steps S104-S110, obtaining the structural calculation model modeling parameters and the first internal force parameters, 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 parameters are 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 parameters and the first internal force parameters, 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 of the component object and the target coefficient, and the target internal force of the cable and the rod is the calculated pretension.

[0040] In 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 via 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. For example, the terminal device 102 performs 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, an in-vehicle device, etc., and this application does not limit the specific implementation of the terminal device 102.

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

[0043] S202: Acquire a structural calculation model modeling parameter and a first internal force parameter, wherein the structural calculation model modeling parameter is used to indicate a camber 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 a column structure, and the upper chord and the lower chord are connected to each other via at least one web member. 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 an equilibrium state corresponding to the flexible photovoltaic cable truss structure based on the structural calculation model modeling parameters and the first internal force parameter, wherein each component object in the structural calculation model in an equilibrium state corresponds to a reference internal force;

[0045] S206: Acquire a first control condition and a second control condition determined based on a target load parameter, wherein the target load parameter is a uniformly distributed load 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 of the component object and the target coefficient.

[0047] As an optional embodiment, 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, 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 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 upper cable component of 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. The ends of the upper chord and the lower chord are connected to the columns and the tension 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, a structural calculation model in an equilibrium state corresponding to the flexible photovoltaic cable truss structure is determined based on the structural calculation model modeling parameters and the first internal force parameters, wherein each component object in the structural calculation model in an equilibrium state corresponds to a reference internal force;

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

[0051] Then, in step S206, a first control condition and a second control condition are obtained based on the target load parameter, 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, if 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 direction of gravity. For example, the direction of the load uniform distribution value q under the most unfavorable combination of loads in the direction of gravity 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, in the equilibrium state, the reference internal forces of the components A, B, C, D, and E in the above structural calculation model are 2N, 4N, 5N, 1N, and 3N, respectively. B is the lower midspan chord, and C is the upper midspan chord. Based on the first control condition for cable pretension, N1 is 10N. In this case, the first adjustment coefficient is N1 divided by the reference internal force of the upper midspan chord C = 10 / 5 = 2. Based on the second control condition for cable pretension, N2 is 12N. In this case, the second adjustment coefficient is N2 divided by the reference internal force of the lower midspan chord B = 12 / 4 = 3. The maximum of the two calculated adjustment coefficients, 3, is taken as the target coefficient. The target internal forces of components A, B, C, D, and E, multiplied by the target coefficients, are 2x3N, 4x3N, 5x3N, 1x3N, and 3x3N, or 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 pretensions.

[0056] Through the above S202-S208, the initial cable pre-tension can be obtained quickly and automatically, 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. It solves 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 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;

[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 a 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 lower chords.

[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 calculated 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 cable truss span value, 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 based on a ratio of the mid-span bending moment to N times the cable truss height, where N is the number of upper chords.

[0064] Optionally, the first target sub-segment in the upper chord may be the 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 the second target subsegment in the lower chord is determined based on the ratio of the mid-span bending moment to S times the cable truss height, where S is the number of lower chords.

[0066] Optionally, the second target sub-segment in the lower chord may be the 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 for 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 for 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 above-mentioned determination of the mid-span bending moment of the flexible photovoltaic cable truss structure based on the target load parameters and the cable truss span value of the cable truss structure includes:

[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 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 a top chord. If there are multiple top chords in the cable truss structure, it is necessary to calculate the uniform load distribution value of all top 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 an equilibrium state;

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

[0076] S3. 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 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 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 just 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 the equilibrium state are obtained; the target coefficient is determined based on 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 the equilibrium 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, 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;

[0081] S2, determine the upper 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 parameters of the flexible photovoltaic cable truss structure are determined based on 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 and is used to increase the self-weight of the structure when calculating the dead load to take into account weights that may not have been fully considered in the preliminary design. The self-weight magnification coefficient of the photovoltaic panel is a coefficient greater than 1 and is used to take into account the weight of the photovoltaic panel and accessories.

[0084] The gravity direction load parameter 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.

[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, wind pressure height variation coefficient, wind vibration coefficient, body coefficient and ground roughness at the layout location can be determined according to the building structure load specification, and the upper suction load parameter can be further determined based on 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, a structural calculation model in equilibrium corresponding to the flexible photovoltaic cable truss structure is determined based on the structural calculation model modeling parameters and the first internal force parameters, 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. Determine a structural calculation model in an equilibrium 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 modeling parameters of the structural calculation model;

[0094] As an optional implementation, the height of the cable truss can be determined according to the layout environment of the flexible photovoltaic cable truss structure. For example, when the flexible photovoltaic cable truss structure is laid out in a wind-resistant environment, the appropriate height can be determined based on 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 based on 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 between components (such as fish-belly cable trusses, radial cable trusses, spoke cable trusses, string-stayed structures, cable-stayed structures, etc.), and are not specifically limited 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 an equilibrium state is determined according to the first internal force;

[0096] Optionally, the above-mentioned target component unit can 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, for example, obtains the parameter value in the first internal force parameter, and configures it as the first internal force of the corresponding component unit. Specifically, the cable or rod unit can be regarded as a compressible two-force rod, and the cable or rod unit is given the first internal force; the first internal force can also be configured for all component objects, and there is no restriction here.

[0097] The structural calculation model in equilibrium is determined based on the first internal force through structural force analysis, finite element calculation, etc., including but not limited to iterative calculation, updating the internal force and deformation state of the structure in each iteration to determine the structural calculation model in equilibrium.

[0098] By obtaining the cable truss height value used to indicate 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 the equilibrium state 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 the improvement of the internal force acquisition efficiency and the accuracy of the internal force calculation in the flexible photovoltaic cable truss structure.

[0099] As an optional solution, determining the structural calculation model in equilibrium according to the structural calculation model configured with the first internal force 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, determining the second internal force corresponding to each component object in the structural calculation model as the reference internal force.

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

[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 the cables and rods are 8N. Based on 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 the 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 forces of the components 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 here.

[0108] Through the above-mentioned implementation mode recorded in this 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 following describes this solution in a specific embodiment. Figure 5 As shown:

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

[0111] Specifically, the appropriate upper chord arch height is first determined, and then the initial equilibrium shape is established (in this state, only pretension exists, 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 below. Figure 3 As shown;

[0112] When automatically calculating the pretension, the program converts each cable and rod unit into a compressive two-force rod. The stiffness of each component is magnified by the same multiple (for example, 5 times, in order to accelerate the convergence of the 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 structural 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 in the internal force of the component obtained from the two calculations is less than 1%;

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

[0119] That is, the calculated internal forces of each component are assigned to each unit again as initial internal forces, the displacements of each node are reset to zero, and new component internal forces are recalculated. This process is repeated, each time using the new internal forces as initial internal forces to assign to each unit and resetting the displacements of each node to zero, until the internal forces are essentially stable, for example, the difference in component internal forces at the same location between two consecutive calculations is less than 1%. At this point, the internal force distribution ratio of each component in the initial equilibrium state can be obtained (in this state, even if the internal forces are amplified or reduced by the same multiple, the entire structure is still in a state of internal force equilibrium, and the displacements of each node are essentially zero).

[0120] As an optional implementation, assuming that the uniformly distributed load 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 mid-span is H, and the mid-span bending moment is M; when q is directed downward, the maximum approximate pressure on the upper chord under this load combination can be obtained as N1=M / (nH), where H is the cable truss height and n is the number of upper chords. When q is directed upward, the maximum approximate pressure on the lower chord under this load combination can be obtained as N2=M / (nH), where H is the cable truss height 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, and the internal forces of each component in the initial equilibrium state are obtained.

[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 entering the various engineering structure parameters, 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, 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 this application, 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.

[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 this application is not limited by the order of the actions described, because according to this 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 this 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. Figure 9 As shown, the device includes:

[0130] A first acquisition unit 902 acquires a structural calculation model modeling parameter and a first internal force parameter, wherein the structural calculation model modeling parameter is used to indicate a camber 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 a column structure, and the upper chord and the lower chord are connected by at least one web member. 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 an equilibrium state corresponding to the flexible photovoltaic cable truss structure based on the structural calculation model modeling parameters and the first internal force parameters, wherein each component object in the structural calculation model in an equilibrium state corresponds to a reference internal force;

[0132] A 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 uniformly distributed load 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 determining unit 908 determines the target internal force corresponding to each component object in the structural calculation model based on the first control condition and the second control condition, wherein the target internal force of the component object is determined based on the reference internal force of the component object and the target coefficient. For a specific embodiment, reference can be made to the example shown in the above-mentioned method for calculating the pretension of the flexible photovoltaic cable truss structure, and will not be repeated here.

[0134] According to another aspect of the embodiment of the present application, an electronic device for implementing the above-mentioned pre-tension calculation method in the flexible photovoltaic cable truss structure is also provided. Figure 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 execute 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. 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 an equilibrium state corresponding to the flexible photovoltaic cable truss structure based on the structural calculation model modeling parameters and the first internal force parameter, wherein each component object in the structural calculation model in the equilibrium state corresponds to a reference internal force;

[0139] S3. Obtaining a first control condition and a second control condition determined based on a target load parameter, wherein the target load parameter is a uniformly distributed load 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 the internal force control condition corresponding to the upper chord. The second control condition is to use a second pressure value of the second target subsegment as the internal force control condition corresponding to the lower chord.

[0140] S4. Determine 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 of the component object and the target coefficient.

[0141] Alternatively, those skilled in the art will appreciate that Figure 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. Figure 10 It does not limit the components of the above electronic device. For example, the electronic device may also include Figure 10 More or fewer components (such as network interfaces, etc.) as shown in, or with Figure 10 Different configurations 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 located 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, used for information such as target determination requests and target sending requests. As an example, such as Figure 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 of 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 configured to receive or send data via a network. Specific examples of the network may include a wired network and a wireless network. In one embodiment, the transmission device 1006 includes a network interface controller (NIC), which can be connected to other network devices and a router via a network cable to communicate with the Internet or a local area network. In one embodiment, the transmission device 1006 is a radio frequency (RF) module, which is configured 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 multiple nodes via network communication. The nodes may form a peer-to-peer (P2P) network, and any 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, comprising a computer program / instructions containing program code for executing the method shown in the flowchart. In such an embodiment, the computer program can be downloaded and installed from a network via a communication component and / or installed from a removable medium. When the computer program is executed by a central processing unit, the various functions provided in the embodiments of the present application are performed.

[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] A computer system includes a central processing unit (CPU), which can perform various appropriate actions and processes based on programs stored in read-only memory (ROM) or programs loaded from the storage unit into random access memory (RAM). The RAM also stores various programs and data required for system operation. The CPU, the read-only memory, and the RAM are connected to each other via a bus. Input / output interfaces (I / O interfaces) are also connected to the bus.

[0150] The following components are connected to the input / output interface: an input section including a keyboard, mouse, etc.; an output section including a cathode ray tube (CRT), a liquid crystal display (LCD), and a speaker; a storage section including a hard disk; and a communication section including a network interface card such as a local area network card and a modem. The communication section 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 magnetic disks, optical disks, magneto-optical disks, semiconductor memories, etc. are installed in the drive as needed so that computer programs read from them can be installed into the storage section as needed.

[0151] In particular, according to an embodiment of the present application, the processes described in the various method flow charts can be implemented as computer software programs. For example, an embodiment of the present application includes a computer program product comprising a computer program carried on a computer-readable medium, the computer program containing program code for executing the methods shown in the flow charts. In such an embodiment, the computer program can be downloaded and installed from a network via a communication portion, and / or installed from a removable medium. When the computer program is executed by a central processing unit, the various functions defined in the system of the present application are performed.

[0152] Optionally, the above-mentioned 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 the first control condition for matching the 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 the second control condition for matching the 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, configured 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 the first target sub-segment in the structural calculation model in the equilibrium state, and a second adjustment coefficient corresponding to the second target sub-segment; determine the target coefficient based on 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 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 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 based on 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 suction load parameters according to the layout position of the flexible photovoltaic cable truss structure; and determine the target load parameters based on the gravity direction load parameters and the upper 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 for 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 an equilibrium state according to the first internal force.

[0157] Optionally, the above-mentioned 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 based on 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.

[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 various optional implementations described above.

[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. 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 an equilibrium state corresponding to the flexible photovoltaic cable truss structure based on the structural calculation model modeling parameters and the first internal force parameter, wherein each component object in the structural calculation model in the equilibrium state corresponds to a reference internal force;

[0162] S3. Obtaining a first control condition and a second control condition determined based on a target load parameter, wherein the target load parameter is a uniformly distributed load 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 the internal force control condition corresponding to the upper chord. The second control condition is to use a second pressure value of the second target subsegment as the internal force control condition corresponding to the lower chord.

[0163] S4. Determine 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 of the component object and the target coefficient.

[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 the hardware related to the terminal device through a program, and the program may be stored in a computer-readable storage medium, which may include: a flash drive, a read-only memory (ROM), a random access memory (RAM), a magnetic 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-mentioned 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 can be personal computers, servers, or network devices, etc.) to execute all or part of the steps of the methods described in each embodiment of the present application.

[0167] In the above embodiments of the present application, the description of each embodiment has its own focus. 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 this application, it should be understood that the disclosed client can be implemented in other ways. Among them, the device embodiments described above are merely illustrative. For example, the division of the units is merely a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, 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, and can be electrical or other forms.

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

[0170] In addition, the functional units in the various embodiments of the present application may be integrated into a single processing unit, or each unit may exist physically separately, or two or more units may be integrated into a single unit. The aforementioned integrated units may be implemented in the form of hardware or software functional units.

[0171] The above is only a preferred embodiment 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: 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 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 a 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; Determining a structural calculation model in equilibrium corresponding to the flexible photovoltaic cable truss structure based on 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; Obtaining a first control condition and a second control condition determined according to a target load parameter, wherein the target load parameter is a uniformly distributed load 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 component object in the structural calculation model is determined, wherein the target internal force of the component object is determined based on 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 pretensioning force that needs to be calculated.

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 includes: determining a mid-span bending moment of the flexible photovoltaic cable truss structure according to the target load parameter and a 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 a 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 a 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 includes: The product of the target load parameter and the square of the cable truss span value is used 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: Obtaining 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; determining 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 upper wind suction load parameters 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 equilibrium corresponding to the flexible photovoltaic cable truss structure based on 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; Determining the geometric relationship between each of the component objects in the structural calculation model according to the cable truss height value and the structural calculation model modeling parameters; 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 an equilibrium 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 state of equilibrium according to the structural calculation model configured with the first internal force includes: Determining a second internal force of each of the component objects in the structural calculation model according to the first internal force; If 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, use the second internal force corresponding to each of the component objects in the structural calculation model as the first internal force, reset the structural displacement to zero, and perform structural calculation again, repeating this step until the difference between the second internal force and the first internal force corresponding to each of the component objects meets the target condition; 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.

8. A pre-tension calculation device in a flexible photovoltaic cable truss structure, characterized in that: include: a first acquisition unit, acquiring a structural calculation model modeling parameter and a first internal force parameter, wherein the structural calculation model modeling parameter is used to indicate an 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 a column structure, 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 component object in the flexible photovoltaic cable truss structure; A first determining unit is configured to determine a structural calculation model in an equilibrium state corresponding to the flexible photovoltaic cable truss structure based on the structural calculation model modeling parameters and the first internal force parameters, wherein each component object in the structural calculation model in an equilibrium state corresponds to a reference internal force; a second acquisition unit, configured to acquire a first control condition and a second control condition determined according to a target load parameter, wherein the target load parameter is a uniformly distributed load 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, and the target internal force of the cable and the rod is the pretensioning force that needs to be calculated.

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

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 according to any one of claims 1 to 7 are implemented.

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