Control method, system, device and readable storage medium for tensioning of a stay cable

Abstract

The application discloses a control method, system and device for tensioning of a stay cable and a readable storage medium, relates to the field of finite element geometric nonlinear calculation, and specifically comprises the following steps: on the basis of a unified structure of the stay cable, a main tower and a main beam, a first unstressed cable length is determined based on an expected cable force and positions of two ends of a cable element; a target unstressed cable length is determined according to an initial unstressed cable length and the first unstressed cable length; and the stay cable is tensioned based on the target unstressed cable length. The application solves the problem of non-convergence of nonlinear calculation of stay cable tensioning in the construction stage of a super-long-span suspension bridge.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of finite element geometric nonlinear calculation, in particular to a control method, system and device for cable-stayed cable tensioning and a readable storage medium. BACKGROUND

[0002] In the construction process of a super-long-span cable-stayed bridge, the cable-stayed cables need to be tensioned. There are two simulation methods for cable tensioning in finite element analysis: cable force tensioning and cable length tensioning. In cable force tensioning, the tensioning is performed by controlling the cable end tension, while in cable length tensioning, the tensioning is performed by controlling the unstressed cable length. The cable-stayed cable tensioning structure has very strong nonlinear mechanical properties in the construction stage, and the cable force tensioning is more obvious. Therefore, the geometric nonlinear properties of the cable-stayed cable, the main beam and the main tower need to be considered.

[0003] The traditional cable force tensioning calculation adopts an isolated body calculation mode. The cable-stayed cable is simulated by a catenary element, that is, the cable-stayed cable is separated from the main beam and the main tower. The method is to calculate the node force of the upper and lower anchor points of the cable-stayed cable according to the tensioning cable force and the position of the two ends of the cable element, and to apply the node external force to the main beam and the main tower. Then, the nonlinear equilibrium state of the isolated body is solved to obtain the new position of the upper and lower anchor points of the cable element. The new cable force is calculated according to the new position of the two ends of the cable element. The new cable force is equal in value but may not be the same in direction as the tensioning cable force. The unbalanced force is calculated according to the new cable force and the internal force of the bridge tower. Then, the new position is calculated by using the Newton iteration until the unbalanced force is less than the control precision.

[0004] However, when the existing isolated body calculation mode is used for cable tensioning calculation, it is not easy to achieve the unified force balance state of multiple isolated bodies due to the consideration of nonlinear calculation of multiple isolated bodies, and thus the nonlinear calculation may not converge. Therefore, how to avoid nonlinear calculation from not converging is a problem that needs to be solved at present. SUMMARY

[0005] The present application provides a control method, system, device and readable storage medium for cable-stayed cable tensioning, which can avoid nonlinear calculation from not converging.

[0006] In a first aspect, an embodiment of the present application provides a control method for cable-stayed cable tensioning, which comprises:

[0007] On the basis of the cable-stayed cable, the main tower and the main beam being a unified structure, a first unstressed cable length is determined based on a target tensioning cable force corresponding to an expected tensioning cable force and the distance between the two ends of the cable element;

[0008] A target unstressed cable length is determined according to the initial unstressed cable length and the first unstressed cable length;

[0009] The cable-stayed cable is tensioned by cable force based on the target unstressed cable length.

[0010] In conjunction with the first aspect, in one embodiment, determining the target stress-free cable length based on the initial stress-free cable length and the first stress-free cable length includes:

[0011] The first cable length correction parameter and the second cable length correction parameter are determined based on the initial stress-free cable length and the first stress-free cable length, respectively.

[0012] The first stress-free cable length is corrected based on the first cable length correction parameter and the second cable length correction parameter to obtain the target stress-free cable length;

[0013] The formula for calculating the first cable length correction parameter is as follows:

[0014]

[0015]

[0016]

[0017] In the formula, The initial stress-free cable length, The first stress-free cable length, This is the first cable length correction parameter. This is the correction parameter for the second cable length.

[0018] In conjunction with the first aspect, in one embodiment, determining the target stress-free cable length based on the initial stress-free cable length and the first stress-free cable length includes:

[0019] The first tension is determined based on the target tension.

[0020] The correction parameters for the first cable length are determined based on the first stress-free cable length, the initial stress-free cable length, the initial tension cable force, the first tension cable force, and the target tension cable force.

[0021] The first stress-free cable length is corrected based on the first cable length correction parameter to obtain the target stress-free cable length.

[0022] In conjunction with the first aspect, in one embodiment, determining the first cable length correction parameter based on the first stress-free cable length, the initial stress-free cable length, the initial tension cable force, the first tension cable force, and the target tension cable force includes:

[0023] Substituting the first stress-free cable length, initial stress-free cable length, initial tension cable force, first tension cable force, and target tension cable force into the first calculation formula, we obtain the first cable length correction parameter. The first calculation formula is:

[0024]

[0025] In the formula, The first stress-free cable length; The initial stress-free cable length; For the first cable tension; This is the initial tension cable force; Tensioning force for the target; This is the first cable length correction parameter.

[0026] In conjunction with the first aspect, in one embodiment, the step of correcting the first stress-free cable length based on the first cable length correction parameter to obtain the target stress-free cable length includes:

[0027] The corrected first stress-free cable length is determined based on the first cable length correction parameter and the first stress-free cable length.

[0028] The second tension is determined based on the corrected first stress-free cable length and the positions of both ends of the cable unit;

[0029] The target stress-free cable length is determined based on the corrected first stress-free cable length, second tension cable force, and target tension cable force.

[0030] In conjunction with the first aspect, in one implementation, determining the target stress-free cable length based on the modified first stress-free cable length, the second tension cable force, and the target tension cable force includes:

[0031] The convergence accuracy is determined based on the second tension cable force and the target tension cable force.

[0032] If the convergence accuracy is less than the preset convergence accuracy threshold, the corrected first stress-free cable length will be used as the target stress-free cable length.

[0033] If the convergence accuracy is not less than the preset convergence accuracy threshold, the positions of the two ends of the new cable unit are determined based on the corrected first stress-free cable length and the positions of the two ends of the cable unit, and the second stress-free cable length is determined based on the positions of the two ends of the new cable unit and the second tension cable force.

[0034] The corrected first stress-free cable length is used as the initial stress-free cable length, and the second stress-free cable length is used as the first stress-free cable length. The step of determining the first cable length correction parameter based on the first stress-free cable length, the initial stress-free cable length, the initial tension cable force, the first tension cable force, and the target tension cable force is repeated.

[0035] Secondly, embodiments of this application provide a control system for tensioning a stay cable, the control system comprising:

[0036] The first processing module is used to determine the first stress-free cable length based on the target tension cable force corresponding to the expected tension cable force and the positions of both ends of the cable unit, on the basis that the cable stays, main tower and main beam are a unified structure.

[0037] a second processing module configured to determine a target unstressed cable length according to the initial unstressed cable length and the first unstressed cable length;

[0038] a third processing module configured to perform cable force tensioning on the cable based on the target unstressed cable length.

[0039] With reference to the second aspect, in an implementation form, the target unstressed cable length is determined according to the initial unstressed cable length and the first unstressed cable length, including:

[0040] a first cable length correction parameter and a second cable length correction parameter are respectively determined based on the initial unstressed cable length and the first unstressed cable length;

[0041] the first unstressed cable length is corrected based on the first cable length correction parameter and the second cable length correction parameter to obtain the target unstressed cable length;

[0042] wherein a calculation formula of the first cable length correction parameter is:

[0043]

[0044] a calculation formula of the second cable length correction parameter is:

[0045]

[0046] in the formula, the initial unstressed cable length is L0, the first unstressed cable length is L1, the first cable length correction parameter is ΔL1, the second cable length correction parameter is ΔL2.

[0047] In a third aspect, an embodiment of the present application provides a control device for cable tensioning, the control device for cable tensioning comprising a processor, a memory, and a control program for cable tensioning stored in the memory and executable by the processor, wherein the control program for cable tensioning, when executed by the processor, implements the steps of the control method for cable tensioning according to any one of the preceding aspects.

[0048] In a fourth aspect, an embodiment of the present application provides a computer readable storage medium, the computer readable storage medium storing a control program for cable tensioning, wherein the control program for cable tensioning, when executed by a processor, implements the steps of the control method for cable tensioning according to any one of the preceding aspects.

[0049] The technical scheme provided by the embodiments of the present application has the following beneficial effects:

[0050] By analyzing the cable-stayed cable, the main tower and the main beam as a unified structure, the overall mechanical balance of the cable-stayed cable structure is achieved, and the interaction between each part can be fully coordinated; therefore, on the basis of the cable-stayed cable, the main tower and the main beam as a unified structure, the first unstressed cable length is determined based on the target cable force corresponding to the expected cable force and the position of the two ends of the cable element, so as to equivalent the target cable force corresponding to the expected cable force to the unstressed cable length of the cable-stayed cable, and then the initial state of the cable-stayed cable can be controlled through the first unstressed cable length, so that the mechanical system of the cable-stayed cable can have a reasonable initial equilibrium point at the beginning of calculation; then the first unstressed cable length is corrected to obtain a more accurate target unstressed cable length according to the initial unstressed cable length and the first unstressed cable length, so that the mechanical system of the cable-stayed cable reaches a more stable state, thereby avoiding the risk of force imbalance between multiple isolators in the prior art, thereby effectively solving the problem of non-convergence of nonlinear solving; and the cable force of the cable-stayed cable is tensioned through the target unstressed cable length, so as to realize the mechanical stability of the cable-stayed cable structure. BRIEF DESCRIPTION OF DRAWINGS

[0051] Figure 1 A flowchart of the cable-stayed cable tensioning control method embodiment of the present application;

[0052] Figure 2 A schematic diagram of the unity of the cable-stayed cable, the main beam and the main tower in the cable-stayed cable tensioning control method of the present application;

[0053] Figure 3 A functional module schematic diagram of the cable-stayed cable tensioning control system embodiment of the present application;

[0054] Figure 4 A hardware structure schematic diagram of the cable-stayed cable tensioning control device involved in the embodiment scheme of the present application. DETAILED DESCRIPTION

[0055] In order for those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0056] In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be described in further detail below with reference to the drawings.

[0057] In a first aspect, the embodiments of the present application provide a cable-stayed cable tensioning control method.

[0058] In an embodiment, referring to Figure 1 , Figure 1 is a flowchart of an embodiment of the control method for tensioning of a cable-stayed cable. As shown in Figure 1 , the control method for tensioning of a cable-stayed cable comprises:

[0059] Step S10: based on a target cable force corresponding to an expected cable force and positions of two ends of a cable element, a first unstressed cable length is determined, on the basis that the cable-stayed cable, the main tower and the main beam are a unified structure.

[0060] Exemplarily, in the embodiment of the present application, the first unstressed cable length represents the geometric length of the cable-stayed cable when no external force is applied; referring to Figure 2 , the cable-stayed cable, the main tower and the main beam can be regarded as a unified structure, and the positions of two ends of the cable element are determined by the position of one end of the cable-stayed cable and the position of the other end of the cable-stayed cable; the expected cable force generally refers to a specific effect expected to be achieved by the tensioning action of the cable by engineers according to the structural requirements and external load conditions in the design stage; it should be understood that the expected cable force determines the tensioning force requirement of the cable, and the target cable force is a specific value for achieving this requirement, and therefore the target cable force can be determined according to the expected cable force.

[0061] It should be understood that the target cable force is determined by analyzing the requirements and the mechanical equilibrium condition, and the positions of two ends of the cable element are given by the structural geometric relationship; the first unstressed cable length can be obtained according to the mechanical relationship between the target cable force and the positions of two ends of the cable element. The above steps ensure that the cable-stayed cable is in a starting point in compliance with the expected mechanical state when there is no initial tension, thereby laying a foundation for subsequent mechanical adjustment and fine design of the cable-stayed cable.

[0062] Specifically, the target cable force corresponding to the expected cable force and the positions of two ends of the cable element can be substituted into the following calculation formula to obtain the first unstressed cable length:

[0063]

[0064] In the formula, E is a preset elastic modulus; A is a preset cross-sectional area of the cable-stayed cable; is the first unstressed cable length; is the target cable force; is the positions of two ends of the cable element.

[0065] Step S20: a target unstressed cable length is determined according to the initial unstressed cable length and the first unstressed cable length.

[0066] Illustratively, in the embodiments of the present application, the initial unstressed cable length is a reference value for calculating the target unstressed cable length, the correction parameter corresponding to the first unstressed cable length can be determined by the initial unstressed cable length and the first unstressed cable length, and the target unstressed cable length can be obtained by correcting the first unstressed cable length by the correction parameter, so as to ensure that the cable reaches a stable state consistent with the expected cable tension after tensioning.

[0067] Step S30: Tension the cable force of the cable based on the target unstressed cable length.

[0068] Illustratively, in the embodiments of the present application, the target unstressed cable length is taken as a change amount, the change of the tensioning force is controlled by controlling the target unstressed cable length, so as to gradually correct the length and stress of the cable, so that the cable can maintain mechanical balance under different loading conditions, and finally realize the state of the cable required by the target unstressed cable length.

[0069] The present application designs and analyzes the cable, the main tower and the main beam as a unified structure, which helps to realize the overall mechanical balance of the cable structure, so that the interaction between each part can be fully coordinated. Therefore, based on the target cable tension corresponding to the expected cable tension and the positions of the two ends of the cable element, the first unstressed cable length is determined, so as to equivalent the target cable tension corresponding to the expected cable tension to the unstressed cable length of the cable, and then the initial state of the cable can be controlled by the first unstressed cable length, so that the mechanical system of the cable can have a reasonable initial equilibrium point when starting to calculate. Then, the first unstressed cable length is corrected according to the initial unstressed cable length and the first unstressed cable length to obtain a more accurate target unstressed cable length, so that the mechanical system of the cable reaches a more stable state, thereby avoiding the risk of imbalance between the multiple isolation bodies in the prior art, and effectively solving the problem of non-convergence of nonlinear solving. Then, the cable force of the cable is tensioned by the target unstressed cable length, so as to realize the mechanical stability of the cable structure.

[0070] Further, in an embodiment, the target unstressed cable length is determined according to the initial unstressed cable length and the first unstressed cable length, comprising:

[0071] The first cable length correction parameter and the second cable length correction parameter are determined based on the initial unstressed cable length and the first unstressed cable length, respectively.

[0072] The first unstressed cable length is corrected based on the first cable length correction parameter and the second cable length correction parameter, so as to obtain the target unstressed cable length.

[0073] The calculation formula of the first cable length correction parameter is:

[0074]

[0075] The calculation formula of the second cable length correction parameter is:

[0076]

[0077] In the formula, is the initial unstressed cable length; is the first unstressed cable length; is the first cable length correction parameter; is the second cable length correction parameter.

[0078] Exemplarily, in the embodiment of the present application, the initial unstressed cable length and the first unstressed cable length reflect the mechanical characteristics of the cable-stayed structure in different states; the first cable length correction parameter and the second cable length correction parameter are used as correction parameters to correct the first unstressed cable length; in actual engineering, the cable-stayed cable is affected by load, temperature change and other external factors, resulting in that the cable-stayed cable tensioning based on the theoretically calculated unstressed cable length cannot achieve the expected cable tensioning force, and therefore the correction parameters need to be introduced to adjust the first unstressed cable length.

[0079] Specifically, the first cable length correction parameter and the second cable length correction parameter can be determined by the initial unstressed cable length and the first unstressed cable length, and then the first unstressed cable length can be more reasonably corrected according to the first cable length correction parameter and the second cable length correction parameter, so as to obtain a more accurate target unstressed cable length, that is, the first unstressed cable length is continuously corrected by the iterative acceleration algorithm.

[0080] Specifically, the first cable length correction parameter can be determined by substituting the initial unstressed cable length and the first unstressed cable length into the following calculation formula:

[0081]

[0082] In the formula, is the initial unstressed cable length; is the first unstressed cable length; is the first cable length correction parameter.

[0083] The second cable length correction parameter can be determined by substituting the initial unstressed cable length and the first unstressed cable length into the following calculation formula:

[0084]

[0085] In the formula, is the second cable length correction parameter.

[0086] The first cable length correction parameter, the second cable length correction parameter and the first unstressed cable length are substituted into the following calculation formula to obtain the corrected first unstressed cable length:

[0087]

[0088] in the formula, is a first cable length correction parameter; is a second cable length correction parameter; is a first unstressed cable length; is a corrected first unstressed cable length.

[0089] Further, in an embodiment, the target unstressed cable length is determined according to the initial unstressed cable length and the first unstressed cable length, including:

[0090] a first tension cable force is determined based on the target tension cable force;

[0091] a first cable length correction parameter is determined according to the first unstressed cable length, the initial unstressed cable length, the initial tension cable force, the first tension cable force and the target tension cable force;

[0092] the first unstressed cable length is corrected based on the first cable length correction parameter to obtain the target unstressed cable length.

[0093] Exemplarily, in the embodiment of the present application, the initial tension cable force is the cable force of the cable in the initial equilibrium state, and after the target tension cable force is assigned to the first tension cable force, the first cable length correction parameter can be determined in combination with the relationship among the first unstressed cable length, the initial unstressed cable length, the initial tension cable force, the first tension cable force and the target tension cable force, and the target unstressed cable length is obtained by correcting the first unstressed cable length according to the first cable length correction parameter, so that the target unstressed cable length can meet the required cable tension requirement in the actual stress state, and thus the precise analysis and optimization of the cable structure are realized.

[0094] Further, in an embodiment, the first cable length correction parameter is determined according to the first unstressed cable length, the initial unstressed cable length, the initial tension cable force, the first tension cable force and the target tension cable force, including:

[0095] the first cable length correction parameter is obtained by substituting the first unstressed cable length, the initial unstressed cable length, the initial tension cable force, the first tension cable force and the target tension cable force into a first calculation formula, and the first calculation formula is:

[0096]

[0097] in the formula, is the first unstressed cable length; is the initial unstressed cable length; is the first tension cable force; is the initial tension cable force; is the target tension cable force; is a first cable length correction parameter.

[0098] Exemplarily, in the embodiment of the present application, the first unstressed cable length is corrected based on the first cable length correction parameter. , the initial unstressed cable length , the initial tension cable force , the first tension cable force and the target tension cable force to obtain the first cable length correction parameter .

[0099]

[0100] Further, in an embodiment, the correction of the first unstressed cable length based on the first cable length correction parameter to obtain the target unstressed cable length comprises:

[0101] determining the corrected first unstressed cable length based on the first cable length correction parameter and the first unstressed cable length;

[0102] determining the second tension cable force according to the corrected first unstressed cable length and the positions of the two ends of the cable element;

[0103] determining the target unstressed cable length based on the corrected first unstressed cable length, the second tension cable force and the target tension cable force.

[0104] Exemplarily, in the embodiment of the present application, the corrected unstressed cable length can be determined by correcting the first unstressed cable length based on the first cable length correction parameter, specifically, the first cable length correction parameter and the first unstressed cable length are substituted into the following calculation formula to obtain the corrected first unstressed cable length:

[0105]

[0106] In the formula, is the first cable length correction parameter; is the first unstressed cable length; is the corrected first unstressed cable length.

[0107] It should be understood that after the corrected first unstressed cable length is determined, the corrected first unstressed cable length and the positions of the two ends of the cable element can be input into a preset finite element analysis software to obtain the second tension cable force; and whether the first unstressed cable length needs to be further corrected is determined by calculating the second tension cable force and the target tension cable force, so as to obtain the target unstressed cable length; it should be noted that the principle and implementation process of the finite element analysis software calculation are well known in the art, and are not described herein for the sake of brevity.

[0108] Further, in an embodiment, the target unstressed cable length is determined based on the corrected first unstressed cable length, the second cable tension and the target cable tension, including:

[0109] a convergence precision is determined based on the second cable tension and the target cable tension;

[0110] if the convergence precision is less than a preset convergence precision threshold, the corrected first unstressed cable length is taken as the target unstressed cable length;

[0111] if the convergence precision is not less than the preset convergence precision threshold, new positions of the cable element ends are determined based on the corrected first unstressed cable length and the positions of the cable element ends, and a second unstressed cable length is determined according to the new positions of the cable element ends and the second cable tension;

[0112] the corrected first unstressed cable length is taken as an initial unstressed cable length, the second unstressed cable length is taken as the first unstressed cable length, and the step of determining the first cable length correction parameter according to the first unstressed cable length, the initial unstressed cable length, the initial cable tension, the first cable tension and the target cable tension is re-executed.

[0113] For example, in the embodiment of the present application, the convergence precision is obtained by substituting the second cable tension and the target cable tension into the following calculation formula:

[0114]

[0115] In the formula, T2 is the second cable tension; T2 is the second cable tension; T is the target cable tension; is the convergence precision.

[0116] It should be noted that the specific value of the preset convergence precision threshold can be determined according to actual needs, and is not limited herein; if the convergence precision is less than the preset convergence precision threshold, it indicates that the cable tensioning according to the corrected first unstressed cable force can achieve the expected tensioning effect, and the corrected first unstressed cable length can be taken as the target unstressed cable length; if the convergence precision is not less than the preset convergence precision threshold, it indicates that the cable tensioning according to the corrected first unstressed cable force still cannot achieve the expected tensioning effect, and the corrected first unstressed cable length and the new positions of the cable element ends can be input into the preset finite element analysis software to determine the new positions of the cable element ends again.

[0117] It should be understood that the second unstressed cable length is obtained by substituting the new positions of the cable element ends, the preset elastic modulus, the preset cable cross-sectional area and the second cable tension into the following calculation formula:

[0118]

[0119] wherein, is the second tension cable force; E is a preset elastic modulus; and A is a preset cross-sectional area of the cable; is the new position of the two ends of the cable element; is the second unstressed cable length; wherein the specific values of the preset elastic modulus and the preset cross-sectional area of the cable can be determined according to actual requirements, which are not limited herein.

[0120] Specifically, after obtaining the second unstressed cable length, the initial unstressed cable length and the first unstressed cable length can be updated, that is, the corrected first unstressed cable length is taken as the initial unstressed cable length, the second unstressed cable length is taken as the first unstressed cable length, and the step of determining the first cable length correction parameter according to the first unstressed cable length, the initial unstressed cable length, the initial tension cable force, the first tension cable force and the target tension cable force is re-executed until the target unstressed cable length that can reach the expected tension cable force is obtained.

[0121] It should be noted that, based on the target tension cable force corresponding to the expected tension cable force and the position of the two ends of the cable element, the first unstressed cable length is determined in the application on the basis that the cable, the main tower and the main beam are a unified structure; and by adjusting the unstressed length of the cable as a variable and using an iterative acceleration algorithm to correct the unstressed cable length, the target unstressed cable length corresponding to the target tension cable force is finally solved.

[0122] In the second aspect, the embodiments of the application also provide a control system for tensioning of a cable.

[0123] In an embodiment, referring to Figure 3 , Figure 3 is a functional module schematic diagram of the control system for tensioning of a cable according to the application. As shown in Figure 3 , the control system for tensioning of a cable comprises:

[0124] A first processing module is configured to determine a first unstressed cable length based on a target tension cable force corresponding to an expected tension cable force and a position of two ends of a cable element on the basis that a cable, a main tower and a main beam are a unified structure;

[0125] A second processing module is configured to determine a target unstressed cable length according to an initial unstressed cable length and the first unstressed cable length;

[0126] A third processing module is configured to tension a cable force based on the target unstressed cable length.

[0127] Further, in an embodiment, the second processing module is specifically configured to:

[0128] determine a first cable length correction parameter and a second cable length correction parameter based on the initial unstressed cable length and the first unstressed cable length, respectively.

[0129] correct the first unstressed cable length based on the first cable length correction parameter and the second cable length correction parameter to obtain a target unstressed cable length;

[0130] wherein a calculation formula of the first cable length correction parameter is:

[0131]

[0132] a calculation formula of the second cable length correction parameter is:

[0133]

[0134] wherein, is an initial unstressed cable length; is the first unstressed cable length; is the first cable length correction parameter; is the second cable length correction parameter.

[0135] Further, in an embodiment, the second processing module is specifically further used for:

[0136] determining the first tension cable force based on the target tension cable force;

[0137] determining the first cable length correction parameter according to the first unstressed cable length, the initial unstressed cable length, the initial tension cable force, the first tension cable force and the target tension cable force;

[0138] correcting the first unstressed cable length based on the first cable length correction parameter to obtain the target unstressed cable length.

[0139] Further, in an embodiment, the second processing module is specifically further used for:

[0140] substituting the first unstressed cable length, the initial unstressed cable length, the initial tension cable force, the first tension cable force and the target tension cable force into a first calculation formula to obtain the first cable length correction parameter, the first calculation formula being:

[0141]

[0142] wherein, is the first unstressed cable length; is the initial unstressed cable length; is the first tension cable force; is the initial tension cable force; is the target tension cable force; is the first cable length correction parameter.

[0143] Further, in an embodiment, the second processing module is specifically further used for:

[0144] determine the first stress-free cable length based on the first cable length correction parameter and the first stress-free cable length;

[0145] determine the second cable tension based on the corrected first stress-free cable length and the position of the cable element;

[0146] determine the target stress-free cable length based on the corrected first stress-free cable length, the second cable tension and the target cable tension.

[0147] Further, in an embodiment, the second processing module is specifically further configured to:

[0148] determine the convergence precision based on the second cable tension and the target cable tension;

[0149] if the convergence precision is less than the preset convergence precision threshold, take the corrected first stress-free cable length as the target stress-free cable length;

[0150] if the convergence precision is not less than the preset convergence precision threshold, determine the new position of the cable element based on the corrected first stress-free cable length and the position of the cable element, and determine the second stress-free cable length based on the new position of the cable element and the second cable tension;

[0151] take the corrected first stress-free cable length as the initial stress-free cable length and take the second stress-free cable length as the first stress-free cable length, and re-perform the step of determining the first cable length correction parameter based on the first stress-free cable length, the initial stress-free cable length, the initial cable tension, the first cable tension and the target cable tension.

[0152] The present application helps to realize the overall mechanical balance of the cable structure by analyzing the cable, the main tower and the main beam as a unified structure, so that the interaction between each part can be fully coordinated; therefore, based on the target cable tension corresponding to the expected cable tension and the position of the cable element, the first stress-free cable length is determined to equivalently convert the target cable tension corresponding to the expected cable tension into the stress-free cable length of the cable, and then the initial state of the cable can be controlled by the first stress-free cable length, so that the mechanical system of the cable has a reasonable initial equilibrium point at the beginning of calculation; then the first stress-free cable length is corrected based on the initial stress-free cable length and the first stress-free cable length to obtain a more accurate target stress-free cable length, so that the mechanical system of the cable reaches a more stable state, thereby avoiding the risk of imbalance between multiple isolation bodies in the prior art, and effectively solving the problem of non-convergence of nonlinear solution; then the cable is tensioned by the target stress-free cable length to realize the mechanical stability of the cable structure.

[0153] The functions of each module in the control system for tensioning the cable-stayed cable correspond to the steps in the control method for tensioning the cable-stayed cable, and the functions and implementation processes are not described again here.

[0154] In a third aspect, the embodiments of the present application provide a control device for tensioning a cable-stayed cable. The control device for tensioning the cable-stayed cable can be a personal computer (PC), a notebook computer, a server, or other device with data processing functions.

[0155] Reference Figure 4 , Figure 4 FIG. 1 is a schematic diagram of a hardware structure of a control device for tensioning a cable-stayed cable according to an embodiment of the present application. In the embodiments of the present application, the control device for tensioning the cable-stayed cable can include a processor, a memory, a communication interface, and a communication bus.

[0156] The communication bus can be of any type and used to interconnect the processor, the memory, and the communication interface.

[0157] The communication interface includes an input / output (I / O) interface, a physical interface, and a logical interface, and other interfaces used to interconnect devices inside the control device for tensioning the cable-stayed cable, and interfaces used to interconnect the control device for tensioning the cable-stayed cable with other devices (such as other computing devices or user devices). The physical interface can be an Ethernet interface, a fiber interface, an ATM interface, etc. The user device can be a display (Display), a keyboard (Keyboard), etc.

[0158] The memory can be various types of storage media, such as random access memory (RAM), read-only memory (ROM), non-volatile RAM (NVRAM), flash memory, optical storage, hard disk, programmable ROM (PROM), erasable PROM (EPROM), electrically erasable PROM (EEPROM), etc.

[0159] The processor can be a general processor, which can invoke a control program for tensioning of the cable-stayed cable stored in the memory and execute the control method for tensioning of the cable-stayed cable provided in the embodiments of the present application. For example, the general processor can be a central processing unit (CPU). The method executed when the control program for tensioning of the cable-stayed cable is invoked can refer to the embodiments of the control method for tensioning of the cable-stayed cable, which will not be repeated here.

[0160] Those skilled in the art can understand that the hardware structure shown in the above-mentioned embodiments is not a limitation to the present application, and can include more or less components, or combine some components, or arrange different components. Figure 4 The hardware structure shown in the above-mentioned embodiments is not a limitation to the present application, and can include more or less components, or combine some components, or arrange different components.

[0161] In a fourth aspect, the embodiments of the present application further provide a readable storage medium.

[0162] The readable storage medium of the present application stores the control program for tensioning of the cable-stayed cable, wherein the control program for tensioning of the cable-stayed cable is executed by the processor to implement the steps of the control method for tensioning of the cable-stayed cable.

[0163] The method implemented when the control program for tensioning of the cable-stayed cable is executed can refer to the embodiments of the control method for tensioning of the cable-stayed cable, which will not be repeated here.

[0164] The terms “include” and “have” and their any variations in the specification and claims of the present application and the above-mentioned drawings are intended to cover the non-exclusive inclusion. For example, a process, method, system, product or device including a series of steps or units is not limited to the listed steps or units, but can optionally further include steps or units not listed, or can optionally further include other steps or units inherent to the process, method, product or device. The terms “first”, “second” and “third” and the like descriptions are used to distinguish different objects, and do not represent the order or limit the types of “first”, “second” and “third”.

[0165] In the description of the embodiments of the present application, “exemplary”, “for example” or “for instance” is used to represent an example, illustration or description. Any embodiment or design scheme described as “exemplary”, “for example” or “for instance” in the embodiments of the present application should not be interpreted as more preferred or more advantageous than other embodiments or design schemes. In fact, the words “exemplary”, “for example” or “for instance” are intended to present the relevant concept in a specific manner.

[0166] In the description of the embodiments of the present application, unless otherwise specified, " / " means the meaning of or, for example, A / B can mean A or B; the text "and / or" is only a description of the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which can represent: A exists alone, A and B exist together, and B exists alone, and in addition, in the description of the embodiments of the present application, "multiple" means two or more than two.

[0167] In some of the processes described in the embodiments of the present application, a plurality of operations or steps are included in a specific order, but it should be understood that these operations or steps can be executed or in parallel without the order in which they appear in the embodiments of the present application, and the serial number of the operation is only used to distinguish different operations, and the serial number itself does not represent any execution order. In addition, these processes can include more or fewer operations, and these operations or steps can be executed in sequence or in parallel, and these operations or steps can be combined.

[0168] It should be noted that the above serial numbers of the embodiments of the present application are only for description, and do not represent the advantages and disadvantages of the embodiments.

[0169] From the above description of the embodiments, those skilled in the art can clearly understand that the above-mentioned embodiment method can be realized by means of software and necessary general hardware platform, of course, it can also be realized by hardware, but in many cases the former is a better embodiment. Based on such understanding, the technical solutions of the present application can be embodied in the form of a software product, which is stored in a storage medium (such as a ROM / RAM, a magnetic disk, an optical disk) as described above, and includes a plurality of instructions for making a terminal device execute the method described in each embodiment of the present application.

[0170] The above is only the preferred embodiment of the present application, and does not limit the patent scope of the present application, and any equivalent structure or equivalent process transformation using the content of the present application specification and drawings, or direct or indirect application in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A method of controlling tensioning of a stay cable, characterized by, The control method of the cable-stayed cable tensioning comprises: On the basis of the cable-stayed cable, the main tower and the main beam being a unified structure, a first unstressed cable length is determined based on a target cable-stayed cable force corresponding to an expected cable-stayed cable force and positions of both ends of the cable element; A target unstressed cable length is determined according to the initial unstressed cable length and the first unstressed cable length; The cable-stayed cable is tensioned based on the target unstressed cable length; The target unstressed cable length is determined according to the initial unstressed cable length and the first unstressed cable length, comprising: A first cable length correction parameter and a second cable length correction parameter are respectively determined based on the initial unstressed cable length and the first unstressed cable length; The first unstressed cable length is corrected based on the first cable length correction parameter and the second cable length correction parameter to obtain the target unstressed cable length; The calculation formula of the first cable length correction parameter is: The calculation formula of the second cable length correction parameter is: wherein is an initial unstressed cable length, is a first unstressed cable length, is a first cable length correction parameter, is a second cable length correction parameter.

2. A method of controlling tensioning of a stay cable, characterized in that The control method of the cable-stayed cable tensioning comprises: On the basis of the cable-stayed cable, the main tower and the main beam being a unified structure, a first unstressed cable length is determined based on a target cable-stayed cable force corresponding to an expected cable-stayed cable force and positions of both ends of the cable element; A target unstressed cable length is determined according to the initial unstressed cable length and the first unstressed cable length; The cable-stayed cable is tensioned based on the target unstressed cable length; The target unstressed cable length is determined according to the initial unstressed cable length and the first unstressed cable length, comprising: A first cable-stayed cable force is determined based on the target cable-stayed cable force; A first cable length correction parameter is determined according to the first unstressed cable length, the initial unstressed cable length, an initial cable-stayed cable force, the first cable-stayed cable force and the target cable-stayed cable force; The first unstressed cable length is corrected based on the first cable length correction parameter to obtain the target unstressed cable length; The first cable length correction parameter is determined according to the first unstressed cable length, the initial unstressed cable length, the initial cable-stayed cable force, the first cable-stayed cable force and the target cable-stayed cable force, comprising: The first cable length correction parameter is obtained by substituting the first unstressed cable length, the initial unstressed cable length, the initial cable-stayed cable force, the first cable-stayed cable force and the target cable-stayed cable force into a first calculation formula, and the first calculation formula is: wherein is the first unstressed cable length; is the initial unstressed cable length; is the first tension cable force; is the initial tension cable force; is the target tension cable force; is the first cable length correction parameter.

3. A method of controlling tensioning of a stay cable as claimed in claim 2, characterized in that The first unstressed cable length is corrected based on the first cable length correction parameter to obtain the target unstressed cable length, comprising: The corrected first unstressed cable length is determined based on the first cable length correction parameter and the first unstressed cable length; A second cable-stayed cable force is determined according to the corrected first unstressed cable length and the positions of both ends of the cable element; The target unstressed cable length is determined based on the corrected first unstressed cable length, the second cable-stayed cable force and the target cable-stayed cable force.

4. A method of controlling tensioning of a stay cable as claimed in claim 3, characterized in that The target unstressed cable length is determined based on the corrected first unstressed cable length, the second cable-stayed cable force and the target cable-stayed cable force, comprising: The convergence precision is determined based on the second cable-stayed cable force and the target cable-stayed cable force; If the convergence precision is less than a preset convergence precision threshold, the corrected first unstressed cable length is taken as the target unstressed cable length; If the convergence precision is not less than the preset convergence precision threshold, new positions of both ends of the cable element are determined based on the corrected first unstressed cable length and the positions of both ends of the cable element, and a second unstressed cable length is determined according to the new positions of both ends of the cable element and the second cable-stayed cable force; The first stress-free cable length after the correction is taken as the initial stress-free cable length, and the second stress-free cable length is taken as the first stress-free cable length, and the step of determining the first cable length correction parameter according to the first stress-free cable length, the initial stress-free cable length, the initial cable tension, the first cable tension and the target cable tension is re-executed.

5. A control system for tensioning of a stay cable, characterized in that The control system of the cable-stayed cable tensioning comprises: A first processing module is configured to determine a first stress-free cable length based on a target cable tension corresponding to an expected cable tension and positions of both ends of a cable element, on the basis that a cable-stayed cable, a main tower and a main beam are a unified structure; A second processing module is configured to determine a target stress-free cable length according to an initial stress-free cable length and the first stress-free cable length; A third processing module is configured to perform cable tensioning on the cable-stayed cable based on the target stress-free cable length; The second processing module is specifically configured to: determine a first cable length correction parameter and a second cable length correction parameter based on the initial stress-free cable length and the first stress-free cable length, respectively; correct the first stress-free cable length based on the first cable length correction parameter and the second cable length correction parameter to obtain the target stress-free cable length; The second processing module is specifically configured to: a calculation formula of the first cable length correction parameter is: a calculation formula of the second cable length correction parameter is: wherein is an initial unstressed cable length, is a first unstressed cable length, is a first cable length correction parameter, is a second cable length correction parameter.

6. A control device for tensioning of a stay cable, characterized in that The control device of the cable-stayed cable tensioning comprises a processor, a memory, and a control program of the cable-stayed cable tensioning stored on the memory and executable by the processor, wherein the control program of the cable-stayed cable tensioning is executed by the processor to implement the steps of the control method of the cable-stayed cable tensioning according to any one of claims 1 to 4.

7. A computer readable storage medium characterized by, The computer readable storage medium stores the control program of the cable-stayed cable tensioning, wherein the control program of the cable-stayed cable tensioning is executed by the processor to implement the steps of the control method of the cable-stayed cable tensioning according to any one of claims 1 to 4.

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