Stay cable tensioning control method, system and equipment and readable storage medium

Abstract

The invention discloses a stay cable tensioning control method, system and equipment and a readable storage medium, and relates to the field of finite element geometric nonlinear computation.The method specifically comprises the steps that on the basis that a stay cable, a main tower and a main beam are of a unified structural body, a first stress-free cable length is determined based on expected tensioning cable force and the positions of the two ends of a cable unit; determining a target unstressed cable length according to the initial unstressed cable length and the first unstressed cable length; and cable force tensioning is conducted on the stay cable based on the target unstressed cable length. By means of the method, the problem that stay cable tension nonlinear calculation is not convergent in the construction stage of the ultra-large-span suspension bridge is solved.

Description

Technical Field

[0001] This application relates to the field of finite element geometric nonlinear calculation, specifically to a control method, system, device, and readable storage medium for cable tensioning. Background Technology

[0002] Long-span cable-stayed bridges require cable tensioning during construction. Finite element analysis simulates cable tensioning in two ways: tensioning by cable force and tensioning by cable length. Tensioning by cable force involves controlling the tension at the cable ends, while tensioning by cable length involves controlling the stress-free length of the cable. During construction, the cable-stayed structure exhibits strong nonlinear mechanical characteristics, which are more pronounced under tensioning by cable force. Therefore, the geometrical nonlinearities of the cable stays, main girder, and main tower must all be considered.

[0003] Traditional cable tension calculations employ an isolated-body calculation mode, simulating the cable stays using catenary elements. This means the cable stays are separated from the main beam and tower. The method involves calculating the nodal forces at the upper and lower anchor points of the cable stays based on the tension force and the positions of the cable element ends. These forces are then applied to the main beam and tower as external nodal forces. The nonlinear equilibrium state of the isolated body is then solved to obtain the new positions of the upper and lower anchor points of the cable element. New cable forces are calculated based on these new positions; these new forces are equal in magnitude to the tension force, but may have different directions. Unbalanced forces are then calculated based on the new cable forces and the internal forces of the tower. Newton-Raphson iteration is then used to calculate the new positions until the unbalanced forces are less than the control precision.

[0004] However, existing isolation-body calculation methods for cable tensioning, due to the consideration of nonlinear calculations involving multiple isolation bodies, make it difficult to achieve a unified force equilibrium state across these bodies, which can easily lead to non-convergence in the nonlinear calculation. Therefore, avoiding non-convergence in nonlinear calculations is a pressing issue that needs to be addressed. Summary of the Invention

[0005] This application provides a control method, system, device, and readable storage medium for cable tensioning, which can avoid nonlinear calculation non-convergence.

[0006] In a first aspect, embodiments of this application provide a method for controlling the tensioning of a stay cable, the method comprising: Based on the fact that the cable stays, main tower and main beam are a unified structure, the length of the first stress-free cable is determined based on the target tension cable force corresponding to the expected tension cable force and the distance between the two ends of the cable unit; The target stress-free cable length is determined based on the initial stress-free cable length and the first stress-free cable length. The cable tensioning is performed on the cable based on the target stress-free cable length.

[0007] 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: 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. 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; The formula for calculating the first cable length correction parameter is as follows:

[0008]

[0009]

[0010] 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.

[0011] 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: The first tension is determined based on the target tension. 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. The first stress-free cable length is corrected based on the first cable length correction parameter to obtain the target stress-free cable length.

[0012] 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: 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:

[0013] 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.

[0014] 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: The corrected first stress-free cable length is determined based on the first cable length correction parameter and the first stress-free cable length. The second tension is determined based on the corrected first stress-free cable length and the positions of both ends of the cable unit; 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.

[0015] 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: The convergence accuracy is determined based on the second tension cable force and the target tension cable force. 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. 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. 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.

[0016] Secondly, embodiments of this application provide a control system for tensioning a stay cable, the control system comprising: 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. The second processing module is used to determine the target stress-free cable length based on the initial stress-free cable length and the first stress-free cable length. The third processing module is used to tension the cable based on the target stress-free cable length.

[0017] In conjunction with the second 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: 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. 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; The formula for calculating the first cable length correction parameter is as follows:

[0018] The formula for calculating the second cable length correction parameter is:

[0019] 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.

[0020] Thirdly, embodiments of this application provide a control device for cable tensioning, the control device for cable tensioning includes a processor, a memory, and a control program for cable tensioning stored in the memory and executable by the processor, wherein when the control program for cable tensioning is executed by the processor, it implements the steps of the control method for cable tensioning as described in any of the preceding claims.

[0021] Fourthly, embodiments of this application provide a computer-readable storage medium storing a control program for cable tensioning, wherein when the control program for cable tensioning is executed by a processor, it implements the steps of the control method for cable tensioning as described in any of the preceding claims.

[0022] The beneficial effects of the technical solutions provided in this application include: Analyzing the stay cables, main tower, and main beam as a unified structure helps achieve overall mechanical equilibrium, ensuring coordinated interaction between components. Therefore, based on this unified structure, the first stress-free cable length is determined using the target tension force corresponding to the expected tension force and the positions of the cable units. This equates the target tension force to the stress-free cable length, allowing control over the initial state of the stay cable and ensuring a reasonable initial equilibrium point for the mechanical system. Further refinement of the first stress-free cable length, based on both the initial and first stress-free lengths, yields a more precise target stress-free cable length, resulting in a more stable mechanical system. This avoids the risk of force imbalance between multiple isolated bodies in existing technologies, effectively addressing the non-convergence problem in nonlinear solutions. Finally, tensioning is applied to the stay cable using the target stress-free cable length to achieve mechanical stability. Attached Figure Description

[0023] Figure 1 This is a flowchart illustrating an embodiment of the control method for tensioning stay cables in this application; Figure 2 This is a schematic diagram of the unified structure of the stay cables, main beam, and main tower in the control method for stay cable tensioning of this application; Figure 3 This is a functional module diagram of an embodiment of the cable tensioning control system of this application; Figure 4 This is a schematic diagram of the hardware structure of the control device for tensioning the cable stays involved in the embodiments of this application. Detailed Implementation

[0024] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present application.

[0025] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0026] In a first aspect, embodiments of this application provide a method for controlling the tensioning of stay cables.

[0027] In one embodiment, reference is made to Figure 1 , Figure 1 This is a flowchart illustrating an embodiment of the control method for tensioning stay cables in this application. Figure 1 As shown, the control methods for tensioning the stay cables include: Step S10: Based on the fact that the stay cables, main tower and main beam are a unified structure, the first stress-free cable length is determined based on the target tension cable force corresponding to the expected tension cable force and the positions of the two ends of the cable unit.

[0028] Exemplary, in an embodiment of this application, the first stress-free cable length represents the geometric length of the stay cable when no external force is applied; refer to Figure 2As shown, the stay cables, main tower, and main beam can be considered as a unified structure, and the positions of the two ends of the cable unit can be determined by the positions of one end of the stay cable and the other end of the stay cable. The expected tension cable force usually refers to the specific effect that the engineer expects to achieve through the tensioning of the cable during the design phase, based on the structural requirements and external load conditions. It should be understood that the expected tension cable force determines the tension requirement of the cable, while the target tension cable force is the specific value to achieve this requirement. Therefore, the target tension cable force can be determined based on the expected tension cable force.

[0029] It should be understood that the target tension cable force is determined through analysis of requirements and mechanical equilibrium conditions, while the positions of the two ends of the cable unit are given by the structural geometry. The first stress-free cable length can be obtained based on the mechanical relationship between the target tension cable force and the positions of the two ends of the cable unit. The above steps ensure that the stay cable is in a starting point that meets the expected mechanical state without initial tension, thus laying the foundation for subsequent mechanical adjustments and refined design of the stay cable.

[0030] Specifically, the first stress-free cable length can be obtained by substituting the target tension corresponding to the expected tension and the positions of both ends of the cable element into the following calculation formula:

[0031] In the formula, E is the preset elastic modulus; A is the preset cross-sectional area of ​​the cable. The first stress-free cable length; Tensioning force for the target; The positions of the two ends of the cable unit.

[0032] Step S20: Determine the target stress-free cable length based on the initial stress-free cable length and the first stress-free cable length.

[0033] As an example, in the embodiments of this application, the initial stress-free cable length is the basic reference value for calculating the target stress-free cable length. The correction parameter corresponding to the first stress-free cable length can be determined by the initial stress-free cable length and the first stress-free cable length. The target stress-free cable length is obtained by correcting the first stress-free cable length with the correction parameter, so as to ensure that the stay cable reaches a stable state consistent with the expected tension after tensioning.

[0034] Step S30: Tension the cable force based on the target stress-free cable length.

[0035] As an example, in the embodiments of this application, the target stress-free cable length is used as a variable. The change in tension is controlled by controlling the target stress-free cable length, so as to gradually correct the length and stress of the cable and maintain mechanical balance under different loading conditions, and finally achieve the cable state required by the target stress-free cable length.

[0036] This application designs and analyzes the stay cables, main tower, and main beam as a unified structure, which helps to achieve the overall mechanical equilibrium of the stay cable structure and allows for full coordination of the interactions between the various parts. Therefore, based on the stay cables, main tower, and main beam as a unified structure, a first stress-free cable length is determined based on the target tension cable force corresponding to the expected tension cable force and the positions of the two ends of the cable unit. This equates the target tension cable force corresponding to the expected tension cable force to the stress-free cable length of the stay cable. The initial state of the stay cable can then be controlled through the first stress-free cable length, ensuring that the mechanical system of the stay cable has a reasonable initial equilibrium point at the start of the calculation. The first stress-free cable length is then 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, enabling the mechanical system of the stay cable to reach a more stable state. This avoids the risk of force imbalance between multiple isolated bodies in the prior art, effectively solving the problem of nonlinear solution non-convergence. Finally, the cable is tensioned using the target stress-free cable length to achieve the mechanical stability of the stay cable structure.

[0037] Further, 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: 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. 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; The formula for calculating the first cable length correction parameter is as follows:

[0038] The formula for calculating the second cable length correction parameter is:

[0039] 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.

[0040] In an exemplary embodiment of this application, the initial stress-free cable length and the first stress-free cable length reflect the mechanical characteristics of the cable-stayed structure under different conditions; the first cable length correction parameter and the second cable length correction parameter are used as correction parameters to correct the first stress-free cable length; in actual engineering, the cable-stayed structure is affected by load, temperature changes and other external factors, which means that the cable tensioning based directly on the theoretically calculated stress-free cable length cannot achieve the expected tension force, so correction parameters need to be introduced to adjust the first stress-free cable length.

[0041] Specifically, the first and second cable length correction parameters can be determined by the initial stress-free cable length and the first stress-free cable length, respectively. Then, the first stress-free cable length can be corrected more reasonably according to the first and second cable length correction parameters, so as to obtain a more accurate target stress-free cable length. That is, the first stress-free cable length is continuously corrected by iterative acceleration algorithm.

[0042] Specifically, the first cable length correction parameter can be determined by the initial stress-free cable length and the first stress-free cable length, and then substituted into the following calculation formula to obtain the first cable length correction parameter:

[0043] In the formula, The initial stress-free cable length; The first stress-free cable length; This is the first cable length correction parameter.

[0044] The second cable length correction parameter can be obtained by substituting the initial stress-free cable length and the first stress-free cable length into the following calculation formula:

[0045] In the formula, This is the correction parameter for the second cable length.

[0046] Substituting the first cable length correction parameter, the second cable length correction parameter, and the first stress-free cable length into the following calculation formula, we obtain the corrected first stress-free cable length:

[0047] In the formula, This is the first cable length correction parameter; This is the second cable length correction parameter; The first stress-free cable length; This is the corrected first stress-free cable length.

[0048] Further, 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: The first tension is determined based on the target tension. 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. The first stress-free cable length is corrected based on the first cable length correction parameter to obtain the target stress-free cable length.

[0049] In an exemplary embodiment of this application, the initial tension cable force is the magnitude of the cable force in the initial equilibrium state of the stay cable. After assigning the target tension cable force to the first tension cable force, the first cable length correction parameter can be determined by combining the relationship between 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. The first stress-free cable length is then corrected according to the first cable length correction parameter to obtain the target stress-free cable length, so that the target stress-free cable length can meet the required stay cable tension under actual stress conditions, thereby achieving accurate analysis and optimization of the stay cable structure.

[0050] Further, 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: 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:

[0051] 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.

[0052] As an example, in an embodiment of this application, the first stress-free cable length is... Initial stress-free cable length Initial tension cable force The first cable tension and target tension cable force Substituting into the following calculation formula yields the first cable length correction parameter. :

[0053] Further, 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: The corrected first stress-free cable length is determined based on the first cable length correction parameter and the first stress-free cable length. The second tension is determined based on the corrected first stress-free cable length and the positions of both ends of the cable unit; 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.

[0054] As an example, in this embodiment of the application, the first stress-free cable length can be corrected by a first cable length correction parameter to determine the corrected stress-free cable length. Specifically, the first cable length correction parameter and the first stress-free cable length are substituted into the following calculation formula to obtain the corrected first stress-free cable length:

[0055] In the formula, This is the first cable length correction parameter; The first stress-free cable length; This is the corrected first stress-free cable length.

[0056] It should be understood that after determining the corrected first stress-free cable length, the corrected first stress-free cable length and the positions of both ends of the cable element can be input into the preset finite element analysis software to obtain the second tension cable force; and by calculating the second tension cable force and the target tension cable force, it can be determined whether the first stress-free cable length needs to be further corrected to obtain the target stress-free cable length; it should be noted that the principle and implementation process of the finite element analysis software calculation are common knowledge in this field, and for the sake of simplicity, they will not be elaborated here.

[0057] Further, in one embodiment, determining the target stress-free cable length based on the corrected first stress-free cable length, the second tension cable force, and the target tension cable force includes: The convergence accuracy is determined based on the second tension cable force and the target tension cable force. 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. 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. 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.

[0058] As an example, in the embodiments of this application, the convergence accuracy is obtained by substituting the second tension cable force and the target tension cable force into the following calculation formula:

[0059] In the formula, For the second cable force; Tensioning force for the target; For convergence accuracy.

[0060] It should be noted that the specific value of the preset convergence accuracy threshold can be determined according to actual needs and is not limited here. If the convergence accuracy is less than the preset convergence accuracy threshold, it means that the tensioning effect can be achieved by using the corrected first stress-free cable force, and the corrected first stress-free cable length can be used as the target stress-free cable length. If the convergence accuracy is not less than the preset convergence accuracy threshold, it means that the tensioning effect cannot be achieved by using the corrected first stress-free cable force, and the corrected first stress-free cable length and the positions of the two ends of the new cable element can be input into the preset finite element analysis software to redetermine the positions of the two ends of the new cable element.

[0061] It should be understood that by substituting the positions of the two ends of the new cable unit, the preset elastic modulus, the preset cross-sectional area of ​​the stay cable, and the second tension of the cable into the following calculation formula, the second stress-free cable length can be obtained:

[0062] In the formula, E is the tension of the second cable; E is the preset elastic modulus; A is the preset cross-sectional area of ​​the cable. The positions of the two ends of the new cable unit; The second stress-free cable length; wherein, the specific values ​​of the preset elastic modulus and the preset cross-sectional area of ​​the stay cable can be determined according to actual needs, and are not limited here.

[0063] Specifically, after obtaining the second stress-free cable length, the initial stress-free cable length and the first stress-free cable length can be updated. That is, the corrected first stress-free cable length can be used as the initial stress-free cable length and the second stress-free cable length can be used as the first stress-free cable length. Then, 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 until the target stress-free cable length that can achieve the expected tension cable force is obtained.

[0064] It should be noted that, based on the fact that the stay cables, main tower and main beam are a unified structure, this application determines the first stress-free cable length based on the target tension cable force corresponding to the expected tension cable force and the positions of the two ends of the cable unit; and by adjusting the variable of the stress-free cable length of the stay cable and using an iterative acceleration algorithm to correct the stress-free cable length, the target stress-free cable length corresponding to the target tension cable force is finally solved.

[0065] Secondly, embodiments of this application also provide a control system for tensioning stay cables.

[0066] In one embodiment, reference is made to Figure 3 , Figure 3This is a functional module diagram of an embodiment of the cable tensioning control system of this application. Figure 3 As shown, the control system for cable tensioning includes: 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. The second processing module is used to determine the target stress-free cable length based on the initial stress-free cable length and the first stress-free cable length. The third processing module is used to tension the cable based on the target stress-free cable length.

[0067] Furthermore, in one embodiment, the second processing module is specifically used for: 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. 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; The formula for calculating the first cable length correction parameter is as follows:

[0068] The formula for calculating the second cable length correction parameter is:

[0069] 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.

[0070] Furthermore, in one embodiment, the second processing module is specifically used for: The first tension is determined based on the target tension. 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. The first stress-free cable length is corrected based on the first cable length correction parameter to obtain the target stress-free cable length.

[0071] Furthermore, in one embodiment, the second processing module is specifically used for: 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:

[0072] 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.

[0073] Furthermore, in one embodiment, the second processing module is specifically used for: The corrected first stress-free cable length is determined based on the first cable length correction parameter and the first stress-free cable length. The second tension is determined based on the corrected first stress-free cable length and the positions of both ends of the cable unit; 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.

[0074] Furthermore, in one embodiment, the second processing module is specifically used for: The convergence accuracy is determined based on the second tension cable force and the target tension cable force. 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. 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. 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.

[0075] This application analyzes the stay cables, main tower, and main beam as a unified structure, which helps to achieve the overall mechanical equilibrium of the stay cable structure and allows for full coordination of the interactions between the various parts. Therefore, based on the stay cables, main tower, and main beam as a unified structure, a first stress-free cable length is determined based on the target tension cable force corresponding to the expected tension cable force and the positions of the two ends of the cable unit. This equates the target tension cable force corresponding to the expected tension cable force to the stress-free cable length of the stay cable. The initial state of the stay cable can then be controlled through the first stress-free cable length, ensuring that the mechanical system of the stay cable has a reasonable initial equilibrium point at the start of the calculation. The first stress-free cable length is then 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, enabling the mechanical system of the stay cable to reach a more stable state. This avoids the risk of force imbalance between multiple isolated bodies in the prior art, effectively solving the problem of nonlinear solution non-convergence. Finally, the cable force is tensioned through the target stress-free cable length to achieve the mechanical stability of the stay cable structure.

[0076] The functions of each module in the above-mentioned cable tensioning control system correspond to the steps in the above-mentioned cable tensioning control method embodiment, and their functions and implementation processes will not be described in detail here.

[0077] Thirdly, embodiments of this application provide a control device for tensioning a stay cable. The control device for tensioning a stay cable can be a personal computer (PC), a laptop computer, a server, or other devices with data processing capabilities.

[0078] Reference Figure 4 , Figure 4 This is a schematic diagram of the hardware structure of the control device for cable tensioning involved in the embodiments of this application. In the embodiments of this application, the control device for cable tensioning may include a processor, a memory, a communication interface, and a communication bus.

[0079] The communication bus can be of any type and is used to interconnect the processor, memory, and communication interface.

[0080] Communication interfaces include input / output (I / O) interfaces, physical interfaces, and logical interfaces used for interconnecting components within the control equipment for cable tensioning, as well as interfaces used for interconnecting the control equipment for cable tensioning with other devices (such as other computing devices or user equipment). Physical interfaces can be Ethernet interfaces, fiber optic interfaces, ATM interfaces, etc.; user equipment can be displays, keyboards, etc.

[0081] 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.

[0082] The processor can be a general-purpose processor, which can call the control program for cable tensioning stored in memory and execute the cable tensioning control method provided in the embodiments of this application. For example, the general-purpose processor can be a central processing unit (CPU). The method executed when the cable tensioning control program is called can be referred to in the various embodiments of the cable tensioning control method of this application, and will not be repeated here.

[0083] Those skilled in the art will understand that Figure 4 The hardware structure shown does not constitute a limitation of this application and may include more or fewer components than shown, or combine certain components, or have different component arrangements.

[0084] Fourthly, embodiments of this application also provide a readable storage medium.

[0085] The present application has a readable storage medium storing a control program for cable tensioning, wherein when the control program for cable tensioning is executed by a processor, the steps of the control method for cable tensioning as described above are implemented.

[0086] The method implemented when the control program for tensioning the stay cables is executed can be referred to in various embodiments of the control method for tensioning stay cables in this application, and will not be repeated here.

[0087] The terms "comprising" and "having," and any variations thereof, in the specification, claims, and accompanying drawings of this application are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to such process, method, product, or apparatus. The terms "first," "second," and "third," etc., are used to distinguish different objects, etc., and do not indicate a sequence, nor do they limit "first," "second," and "third" to different types.

[0088] In the description of the embodiments of this application, terms such as "exemplary," "for example," or "for instance" are used to indicate examples, illustrations, or explanations. Any embodiment or design described as "exemplary," "for example," or "for instance" in the embodiments of this application should not be construed as being more preferred or advantageous than other embodiments or designs. Specifically, the use of terms such as "exemplary," "for example," or "for instance" is intended to present the relevant concepts in a concrete manner.

[0089] In the description of the embodiments of this application, unless otherwise stated, " / " means "or". For example, A / B can mean A or B. The "and / or" in the text is merely a description of the relationship between related objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists alone, A and B exist simultaneously, and B exists alone. In addition, in the description of the embodiments of this application, "multiple" means two or more.

[0090] In some processes described in the embodiments of this application, multiple operations or steps are included in a specific order. However, it should be understood that these operations or steps may not be executed in the order they appear in the embodiments of this application, or they may be executed in parallel. The sequence number of the operation is only used to distinguish different operations, and the sequence number itself does not represent any execution order. In addition, these processes may include more or fewer operations, and these operations or steps may be executed sequentially or in parallel, and these operations or steps may be combined.

[0091] It should be noted that the sequence numbers of the embodiments in this application are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0092] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) as described above, and includes several instructions to cause a terminal device to execute the methods described in the various embodiments of this application.

[0093] The above are merely preferred embodiments of this application and do not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A method for controlling the tensioning of stay cables, characterized in that, The method for controlling the tensioning of the stay cables includes: Based on the fact that the cable stays, main tower and main beam are a unified structure, the first stress-free cable length is determined based on the target tension cable force corresponding to the expected tension cable force and the positions of the two ends of the cable unit. The target stress-free cable length is determined based on the initial stress-free cable length and the first stress-free cable length. The cable tensioning is performed on the cable based on the target stress-free cable length.

2. The method for controlling the tensioning of stay cables as described in claim 1, characterized in that, The determination of the target stress-free cable length based on the initial stress-free cable length and the first stress-free cable length includes: 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. 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; The formula for calculating the first cable length correction parameter is as follows: The formula for calculating the second cable length correction parameter is: 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.

3. The method for controlling the tensioning of stay cables as described in claim 1, characterized in that, The determination of the target stress-free cable length based on the initial stress-free cable length and the first stress-free cable length includes: The first tension is determined based on the target tension. 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. The first stress-free cable length is corrected based on the first cable length correction parameter to obtain the target stress-free cable length.

4. The method for controlling the tensioning of stay cables as described in claim 3, characterized in that, The determination of the first cable length correction parameter based on the first stress-free cable length, initial stress-free cable length, initial tension cable force, first tension cable force, and target tension cable force includes: 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: In the formula, The first stress-free cable length; The initial stress-free cable length; For the first cable force; This is the initial tension cable force; Tensioning force for the target; This is the first cable length correction parameter.

5. The method for controlling the tensioning of stay cables as described in claim 3, characterized in that, 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: The corrected first stress-free cable length is determined based on the first cable length correction parameter and the first stress-free cable length. The second tension is determined based on the corrected first stress-free cable length and the positions of both ends of the cable unit; 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.

6. The method for controlling the tensioning of stay cables as described in claim 5, characterized in that, The determination of the target stress-free cable length based on the corrected first stress-free cable length, second tension cable force, and target tension cable force includes: The convergence accuracy is determined based on the second tension cable force and the target tension cable force. 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. 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. 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.

7. A control system for tensioning a cable-stayed bridge, characterized in that, The control system for tensioning the stay cables includes: 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. The second processing module is used to determine the target stress-free cable length based on the initial stress-free cable length and the first stress-free cable length. The third processing module is used to tension the cable based on the target stress-free cable length.

8. The control system for cable tensioning as described in claim 7, characterized in that, The second processing module is specifically used for: 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. 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; The formula for calculating the first cable length correction parameter is as follows: The formula for calculating the second cable length correction parameter is: 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.

9. A control device for tensioning stay cables, characterized in that, The control device for tensioning the cable-stayed bridge includes a processor, a memory, and a control program for tensioning the cable-stayed bridge stored in the memory and executable by the processor, wherein when the control program for tensioning the cable-stayed bridge is executed by the processor, it implements the steps of the control method for tensioning the cable-stayed bridge as described in any one of claims 1 to 6.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a control program for cable tensioning, wherein when the control program for cable tensioning is executed by a processor, it implements the steps of the control method for cable tensioning as described in any one of claims 1 to 6.

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