Cable-stayed bridge cable force testing method and device, storage medium and product

Abstract

The invention discloses a cable-stayed bridge cable force testing method and device, a storage medium and a product, and relates to the technical field of cable-stayed bridge cable force testing. A cable-stayed bridge comprises a stay cable connected with a shock absorber; the cable-stayed bridge cable force test method comprises the following steps: carrying out a tension test on a stay cable to obtain a flexural rigidity value of the stay cable and a strain increment value caused by vibration of the stay cable near an initial balance position, and vibrating the stay cable to obtain a tension test value group of the stay cable; obtaining a simulated tension value group of the stay cable according to a preset condition; and obtaining the cable force value of the stay cable according to the simulated tension value group. According to the cable-stayed bridge cable force testing method, the problem of cable force testing errors caused by the fact that the shock absorber changes the boundary condition is effectively solved, the accuracy of cable-stayed bridge structure safety evaluation is improved, the stress condition of the stay cable under the real boundary condition can be reflected, and the structural stability of the cable-stayed bridge can be better monitored and maintained.

Description

Technical Field

[0001] The invention relates to the technical field of cable-stayed bridge cable force testing, and in particular to a cable-stayed bridge cable force testing method, equipment, storage medium and product. Background Art

[0002] In the prior art, cable-stayed bridges are an important form of bridge and are widely used in modern bridge engineering. The performance of the key component, the cable, directly affects the structural stability and safety of the bridge. In practical applications, the cable will have certain sag and stress characteristics due to its own weight and bending stiffness. Therefore, when analyzing its stress condition, it is usually regarded as a beam model with tension at both ends.

[0003] Cable vibration in cable-stayed bridges is a common and important phenomenon. Especially in the case of wind-induced vibration, the cables may experience various vibration forms such as vortex vibration, wake vibration, rain vibration and parametric resonance. These vibration phenomena may threaten the structural safety of the bridge. Installing vibration absorbers to increase the generalized equivalent damping ratio of the cables is a simple and effective means to suppress large vibrations of the cables.

[0004] However, due to the installation of the shock absorber, the boundary conditions of the cable have changed, specifically, the cable is divided into three sections with a longer middle section and shorter sections on both sides. The existing cable force calculation algorithms are developed based on the traditional models with both ends consolidated or hinged (such as the tension string model or the horizontal beam model). These algorithms do not take into account the changes in the boundary conditions of the cable after the shock absorber is installed, and are therefore not suitable for the cable with shock absorbers. Due to the inapplicability of the algorithm, there will inevitably be a large error between the calculation results and the actual situation, resulting in the inability of the existing cable force test method to accurately evaluate the actual force and vibration of the cable. Therefore, the prior art urgently needs an improved cable force test method to more accurately evaluate the force and vibration of the cable with shock absorbers. Summary of the invention

[0005] The main purpose of the present invention is to provide a cable-stayed bridge cable force testing method, equipment, storage medium and product, aiming to solve the technical problem that the prior art cannot accurately evaluate the actual stress and vibration conditions of the cable.

[0006] To achieve the above object, the present invention provides a cable-stayed bridge cable force testing method, wherein the cable-stayed bridge comprises a cable-stayed cable connected to a vibration absorber; the cable-stayed bridge cable force testing method comprises:

[0007] Performing a tension test on the stay cable to obtain a bending stiffness value EI of the stay cable and a strain increment value ε caused by vibration of the stay cable near an initial equilibrium position, and vibrating the stay cable to obtain a tension test value group of the stay cable;

[0008] Obtaining a simulated tension value group of the stay cable according to preset conditions;

[0009] According to the simulated tension value group, the cable force value S of the inclined cable is obtained. z .

[0010] In one embodiment, the preset condition is to ignore the bending stiffness of the inclined cable and ignore the effect of the shock absorber on the cable force value S z , that is, the bending stiffness value = 0, the strain increment value ε = 0; the simulated tension value group includes a first simulated tension value S1;

[0011] The step of obtaining the simulated tension value group of the inclined cable according to the preset conditions comprises:

[0012] According to the preset conditions, the first simulated tension value S1 is obtained using formula 1;

[0013] The formula 1 is:

[0014]

[0015] Wherein, m is the mass per unit length of the inclined cable, and ω i is the deadweight per unit length of the cable in the i-th vibration order, l is the total length of the cable, i is the vibration order of the cable, and f i is the vibration frequency of the cable in the i-th vibration order.

[0016] In one embodiment, the preset condition is to ignore only the bending stiffness of the cable, that is, the bending stiffness value EI=0, the strain increment value ε≠0; the simulated tension value group includes a second simulated tension value S2;

[0017] The step of obtaining the simulated tension value group of the inclined cable according to the preset conditions also includes:

[0018] According to the preset conditions, the second simulated tension value S2 is obtained using Formula 2;

[0019] The formula 2 is:

[0020]

[0021] Wherein, k is the equivalent stiffness of the shock absorber.

[0022] In one embodiment, the preset condition is to only ignore the effect of the shock absorber on the cable force value S z , that is, the bending stiffness value EI≠0, the strain increment value ε=0; the simulated tension value group includes a third simulated tension value S3;

[0023] The step of obtaining the simulated tension value group of the inclined cable according to the preset conditions also includes:

[0024] According to the preset conditions, the third simulated tension value S3 is obtained using Formula 3;

[0025] The formula three is:

[0026]

[0027] In one embodiment, the preset condition is that the bending stiffness of the inclined cable and the effect of the shock absorber on the cable force value S are not ignored. z , that is, the bending stiffness value EI≠0, the strain increment value ε≠0; the simulated tension value group includes a fourth simulated tension value S4;

[0028] The step of obtaining the simulated tension value group of the inclined cable according to the preset conditions also includes:

[0029] According to the preset conditions, the fourth simulated tension value S4 is obtained using Formula 4;

[0030] The formula 4 is:

[0031]

[0032] In one embodiment, the cable force value S of the inclined cable is obtained according to the simulated tension value group. z The steps include:

[0033] According to the first simulated tension value S1, the second simulated tension value S2, the third simulated tension value S3 and the fourth simulated tension value S4, the cable force value S is obtained by using Formula 5: z ;

[0034] The formula five is:

[0035] S z =w1*S1+w2*S2+w3*S3+w4*S4

[0036] Among them, w1 is the first weight, w2 is the second weight, w3 is the third weight, and w4 is the fourth weight.

[0037] In one embodiment, the cable force value S of the inclined cable is obtained according to the simulated tension value group. z Prior to the step of, the cable-stayed bridge cable force testing method further comprises:

[0038] According to the preset condition, the first weight w1, the second weight w2, the third weight w3 and the fourth weight w4 are obtained.

[0039] In addition, to achieve the above-mentioned purpose, the present invention also proposes a cable-stayed bridge cable force testing device, which includes: a memory, a processor, and a computer program stored in the memory and executable on the processor, and the computer program is configured to implement the steps of the cable-stayed bridge cable force testing method as described above.

[0040] In addition, to achieve the above-mentioned purpose, the present invention also proposes a storage medium, which is a computer-readable storage medium, and a computer program is stored on the storage medium. When the computer program is executed by a processor, the steps of the cable-stayed bridge cable force testing method as described above are implemented.

[0041] In addition, to achieve the above-mentioned purpose, the present invention also provides a computer program product, which includes a computer program, and when the computer program is executed by a processor, it implements the steps of the cable-stayed bridge cable force testing method as described above.

[0042] One or more technical solutions proposed in the present invention effectively solve the cable force test error problem caused by the change of boundary conditions by the shock absorber through the cable force test method of the cable-stayed bridge. The preset conditions can be flexibly adapted to different cable-stayed cable conditions, thereby improving the applicability of the cable force value. The cable force value obtained by obtaining the actual bending stiffness value and the strain increment value and combining the simulated tension value group is more accurate, thereby improving the accuracy of the cable-stayed bridge structure safety assessment and reducing the error. Moreover, the method is more suitable for cables with shock absorbers, can provide accurate cable force test results under complex boundary conditions, and can reflect the stress conditions of the cables under real boundary conditions, so as to better monitor and maintain the structural stability of the cable-stayed bridge. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0044] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0045] Figure 1 A schematic diagram of a flow chart provided for an embodiment of a cable-stayed bridge cable force testing method of the present invention;

[0046] Figure 2 for Figure 1 A detailed flow chart of step S20 in an embodiment;

[0047] Figure 3 for Figure 1 A detailed flow chart of another embodiment of step S20;

[0048] Figure 4 for Figure 1 A detailed flow chart of step S30 in an embodiment;

[0049] Figure 5 for Figure 4 A detailed flow chart of an embodiment before step S31;

[0050] Figure 6 Schematic diagram of the equipment structure of the hardware operating environment involved in the cable-stayed bridge cable force testing method in an embodiment of the present invention.

[0051] Description of Figure Numbers:

[0052] 1001, processing device; 1002, ROM; 1003, storage device; 1004, RAM; 1005, bus; 1006, I / O interface; 1007, input device; 1008, output device; 1009, communication device.

[0053] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings in conjunction with the embodiments. DETAILED DESCRIPTION

[0054] It should be understood that the specific embodiments described herein are only used to explain the technical solutions of the present invention and are not used to limit the present invention.

[0055] In order to better understand the technical solution of the present invention, a detailed description will be given below in conjunction with the accompanying drawings and specific implementation methods.

[0056] Cable vibration in cable-stayed bridges is a common and important phenomenon. Especially in the case of wind-induced vibration, the cables may experience various vibration forms such as vortex vibration, wake vibration, rain vibration and parametric resonance. These vibration phenomena may threaten the structural safety of the bridge. Installing vibration absorbers to increase the generalized equivalent damping ratio of the cables is a simple and effective means to suppress large vibrations of the cables.

[0057] However, due to the installation of the shock absorber, the boundary conditions of the cable have changed, specifically, the cable is divided into three sections with a longer middle section and shorter sections on both sides. The existing cable force calculation algorithms are developed based on the traditional models with both ends consolidated or hinged (such as the tension string model or the horizontal beam model). These algorithms do not take into account the changes in the boundary conditions of the cable after the shock absorber is installed, and are therefore not suitable for the cable with shock absorbers. Due to the inapplicability of the algorithm, there will inevitably be a large error between the calculation results and the actual situation, resulting in the inability of the existing cable force test method to accurately evaluate the actual force and vibration of the cable. Therefore, the prior art urgently needs an improved cable force test method to more accurately evaluate the force and vibration of the cable with shock absorbers.

[0058] In order to solve this technical problem, the present invention proposes a cable-stayed bridge cable force testing method, equipment, storage medium and product.

[0059] See also Figure 1 , in one embodiment of the present invention, the cable-stayed bridge comprises a stay cable connected to a vibration damper;

[0060] The cable-stayed bridge cable force testing method comprises:

[0061] Step S10, performing a tension test on the stay cable to obtain a bending stiffness value EI of the stay cable and a strain increment value ε caused by vibration of the stay cable near an initial equilibrium position, and vibrating the stay cable to obtain a tension test value group of the stay cable;

[0062] Step S20, obtaining a simulated tension value group of the stay cable according to preset conditions;

[0063] Step S30: Obtain the cable force value S of the inclined cable according to the simulated tension value group. z .

[0064] It should be noted that the execution subject of this embodiment can be a computing service device with data processing, network communication and program running functions, such as a tablet computer, a personal computer, a mobile phone, etc., or an electronic device that can realize the above functions.

[0065] Specifically, a tension test is performed on the cable to measure the tension of the cable in actual use. The bending stiffness value of the cable is obtained through the test to analyze the force and vibration characteristics of the cable, and the strain increment value caused by the vibration of the cable near the initial equilibrium position is measured to obtain the stress change of the cable during the vibration process. Vibration is artificially applied to the cable to make the cable produce a predetermined vibration. During the vibration process, the tension test value group of the cable is obtained for subsequent cable force calculation. And the preset condition is whether to consider the bending stiffness value EI and / or the strain increment value ε. According to the preset condition, combined with the actual situation of the cable (the bending stiffness value EI and the strain increment value ε), the simulated tension value group of the cable is calculated. Among them, the role of the preset condition is to split the calculation process, make the calculation process easy to execute, and obtain the force condition of the cable under the real boundary conditions in the subsequent process, so as to better monitor and maintain the structural stability of the cable-stayed bridge.

[0066] In the technical solution provided by the present invention, the cable force test method of the cable-stayed bridge effectively solves the cable force test error problem caused by the change of boundary conditions of the shock absorber. The preset conditions can be flexibly adapted to different cable-stayed conditions, thereby improving the cable force value S z The applicability of the cable force S is obtained by obtaining the actual bending stiffness value and the strain increment value and combining the cable force value S obtained by the simulated tension value group. z It is more precise, improves the accuracy of the safety assessment of the cable-stayed bridge structure, and reduces errors; and this method is more suitable for the cable-stayed cable with a shock absorber, can provide accurate cable force test results under complex boundary conditions, and can reflect the stress conditions of the cable-stayed cable under real boundary conditions, so as to better monitor and maintain the structural stability of the cable-stayed bridge.

[0067] In an embodiment of the present invention, the preset condition is to ignore the bending stiffness of the inclined cable and ignore the effect of the shock absorber on the cable force value S z , that is, the bending stiffness value = 0, the strain increment value ε = 0; the simulated tension value group includes a first simulated tension value S1;

[0068] The step of obtaining the simulated tension value group of the inclined cable according to the preset conditions comprises:

[0069] Step S21, according to the preset conditions, using formula 1 to obtain the first simulated tension value S1;

[0070] The formula 1 is:

[0071]

[0072] Wherein, m is the mass per unit length of the inclined cable, and ω i is the deadweight per unit length of the cable in the i-th vibration order, l is the total length of the cable, i is the vibration order of the cable, and f i is the vibration frequency of the cable in the i-th vibration order.

[0073] Specifically, refer to the cable force calculation formula of the string vibration theory in the prior art. By exciting the inclined cable to vibrate, and measuring its vibration characteristics at different vibration orders. The vibration order i is the different modal vibration modes of the inclined cable. By measuring and calculating the vibration parameters at different orders in detail, an accurate group of tension test values ​​can be obtained, which provides basic data for subsequent calculations. Considering different vibration modes helps to fully understand the stress conditions of the inclined cable under actual working conditions. By simplifying the model calculation, the preliminary first simulated tension value S1 is quickly obtained to correct the cable force value S z Provide basic data.

[0074] More specifically, since the bending stiffness EI and the effect of the shock absorber on the cable force S are neglected, z The influence of the strain increment ε can be used to quickly evaluate the cable force S of the inclined cable. z , which is suitable for the early design and preliminary evaluation stage. This embodiment ignores the bending stiffness EI and the effect of the shock absorber on the cable force S through the preset conditions. z The influence of the strain increment value ε is used to calculate the simulated tension value of the cable using a simple vibration analysis formula. Although some complex factors are simplified, this method can still provide a basic cable force assessment and can serve as a basis for further complex calculations. Through this method, the preliminary first simulated tension value S1 can be obtained quickly and effectively, providing an important reference for the design and maintenance of the cable-stayed bridge.

[0075] Please continue to refer to Figure 1 , and refer to Figure 2 In an embodiment of the present invention, the preset condition is to ignore only the bending stiffness of the cable, that is, the bending stiffness value EI=0, the strain increment value ε≠0; the simulated tension value group includes a second simulated tension value S2;

[0076] The step of obtaining the simulated tension value group of the inclined cable according to the preset conditions also includes:

[0077] Step S22, according to the preset conditions, using Formula 2 to obtain the second simulated tension value S2;

[0078] The formula 2 is:

[0079]

[0080]

[0081] Wherein, k is the equivalent stiffness of the shock absorber.

[0082] Specifically, the equivalent stiffness k of the shock absorber is obtained by experiment or calculation, which reflects the influence of the shock absorber on the vibration of the inclined cable. The vibration frequency f of the inclined cable in the i-th vibration order is measured by a spectrum analyzer or other vibration measuring equipment. i .

[0083] More specifically, in this embodiment, by only considering the equivalent stiffness k of the shock absorber and incorporating the strain increment value ε, the cable force value S is calculated. z It is more accurate and applicable to the inclined cable that needs to consider the influence of the shock absorber, which improves the applicability of the method, and the second simulated tension value S2 obtained is used to further correct the cable force value S z Provide basic data.

[0084] In an embodiment of the present invention, the preset condition is to only ignore the effect of the shock absorber on the cable force value S z , that is, the bending stiffness value EI≠0, the strain increment value ε=0; the simulated tension value group includes a third simulated tension value S3;

[0085] The step of obtaining the simulated tension value group of the inclined cable according to the preset conditions also includes:

[0086] Step S23, according to the preset conditions, using Formula 3 to obtain the third simulated tension value S3;

[0087] The formula three is:

[0088]

[0089] Specifically, the calculation process of this embodiment is consistent with the cable force test formula considering the bending stiffness EI at both ends. In the embodiment of the present invention, by considering the bending stiffness EI, the third simulated tension value S3 is more compatible with the actual working condition, and the cable force value S z reliability.

[0090] continue Figure 1 , and refer to Figure 3 In the embodiment of the present invention, the preset condition is that the bending stiffness of the inclined cable is not ignored and the effect of the shock absorber on the cable force value S is not ignored. z , that is, the bending stiffness value EI≠0, the strain increment value ε≠0; the simulated tension value group includes a fourth simulated tension value S4;

[0091] The step of obtaining the simulated tension value group of the inclined cable according to the preset conditions also includes:

[0092] Step S24, according to the preset conditions, using Formula 4 to obtain the fourth simulated tension value S4;

[0093] The formula 4 is:

[0094]

[0095] Specifically, this embodiment obtains the most accurate fourth simulated tension value S4 by comprehensively considering the influence of bending stiffness and shock absorber. Through the above embodiments, the preset condition is whether to ignore the bending stiffness EI of the inclined cable and / or ignore the influence of the shock absorber on the cable force value S z The influence of the strain increment ε is to increase the cable force S z The calculation accuracy provides a reliable basis for the refined structural analysis of cable-stayed bridges.

[0096] In addition, the preset condition is whether to ignore the bending stiffness EI of the inclined cable and / or ignore the effect of the shock absorber on the cable force value S z The influence of the strain increment ε can simplify the cable force value S of the inclined cable. z The calculation difficulty is reduced, and the parameters and steps required for calculation are reduced. This can avoid cumbersome calculation processes and make the entire calculation process more concise and clear. The simplified calculation method is easier to implement on various computing devices, without the support of complex computing software, which reduces the difficulty of implementation. After simplifying the calculation method, the time required for calculation is greatly shortened, which is particularly important in scenarios where real-time monitoring or rapid analysis of the stress conditions of the inclined cable is required, such as in the construction and maintenance of bridges, and reduces the demand for computing resources, so that it can also run efficiently on ordinary computing devices (such as tablets, personal computers or mobile phones), reducing the dependence on high-performance computing devices. In addition, although different preset conditions are selected in each embodiment, it can still reflect the basic stress conditions of the inclined cable, ensuring that the calculation results have a certain degree of accuracy and reliability. Through the reasonable selection of the preset conditions, it can be applied to most common inclined cable situations to ensure the universal applicability of the results. In addition, the flexibility of the preset conditions makes this method applicable to inclined cables of different specifications, different materials, and different lengths, and has strong applicability and versatility.

[0097] More specifically, the simplified calculation process is easy to understand and apply, which reduces the requirements for the professional knowledge of operators, making it easier for engineering and technical personnel to operate and apply it in actual work. And due to the improvement of calculation efficiency, it is possible to realize real-time monitoring of the stress condition of the inclined cable, timely discover and deal with potential safety hazards, and ensure the safe operation of the bridge. In addition, through a fast and simple calculation method, the stress condition of the inclined cable can be evaluated in time, which is convenient for daily monitoring and maintenance of the bridge. Through the reasonable setting of the preset conditions, the difference between the calculation results and the actual situation can be reduced, the accuracy of the cable force test results can be improved, and the evaluation of the safety of the bridge structure can be enhanced.

[0098] It should be understood that since the preset condition in step S24 is not to ignore the bending stiffness of the inclined cable and not to ignore the effect of the shock absorber on the cable force value S z In step S24, the fourth simulated tension value S4 obtained by using the formula 4 can represent the cable force value S of the inclined cable. z The fourth simulated tension value S4 takes into account the change in boundary conditions of the cable after the shock absorber is installed. Therefore, the fourth simulated tension value S4 is closer to the actual situation and can more accurately evaluate the actual force and vibration of the cable.

[0099] Please continue to refer to Figure 1 , and refer to Figure 4 In an embodiment of the present invention, the cable force value S of the inclined cable is obtained according to the simulated tension value group. z The steps include:

[0100] Step S31: According to the first simulated tension value S1, the second simulated tension value S2, the third simulated tension value S3 and the fourth simulated tension value S4, the cable force value S is obtained by using Formula 5. z ;

[0101] The formula five is:

[0102] S z =w1*S1+w2*S2+w3*S3+w4*S4

[0103] Among them, w1 is the first weight, w2 is the second weight, w3 is the third weight, and w4 is the fourth weight.

[0104] Specifically, in the absence of actual reference values, a reasonable estimation method based on theory and experience is provided. According to the specific engineering conditions, the weight distribution can be further adjusted to improve the accuracy of the results. This embodiment obtains a more accurate cable force value S by reasonably distributing weights. z .

[0105] More specifically, w1+w2+w3+w4=1. The use of normalized weights can easily compare the contributions of different factors, ensuring that the total contribution remains consistent, and the relative importance will not be affected by the absolute size of the weights. The normalized weights maintain the proportional relationship between the various factors, further improving the cable force value S. z The calculation accuracy.

[0106] Please continue to refer to Figure 4 , and refer to Figure 5 In an embodiment of the present invention, the cable force value S of the inclined cable is obtained according to the simulated tension value group. z Prior to the step of, the cable-stayed bridge cable force testing method further comprises:

[0107] Step F10: Obtain the first weight w1, the second weight w2, the third weight w3 and the fourth weight w4 according to the preset condition.

[0108] Specifically, as the formula covers more factors, its calculation results should be closer to the actual situation. In the cable force test of cable-stayed bridges, the influence of shock absorbers cannot be ignored. The presence of shock absorbers will affect the vibration frequency of the cables, and thus affect the cable force test results. Therefore, considering the influence of shock absorbers, only the effect of the shock absorbers on the cable force value S is ignored. z The second simulated tension value S2 obtained by the influence of the cable is given a higher weight, and the bending stiffness of the cable and the effect of the shock absorber on the cable force value S are not ignored. z The fourth simulated tension value S4 obtained due to the influence of is given the highest weight.

[0109] More specifically, when obtaining the cable force value S of the inclined cable connected to the shock absorber z hour:

[0110] Since the first simulated tension value S1 ignores the bending stiffness of the inclined cable and ignores the effect of the shock absorber on the cable force value S z The influence of, that is, the bending stiffness value EI = 0, the strain increment value ε = 0, so the weight is low, w1 = 0.1;

[0111] Since the second simulated tension value S2 only ignores the bending stiffness of the cable, that is, the bending stiffness value EI=0, and the strain increment value ε≠0, the weight is relatively high, w2=0.3;

[0112] Since the third simulated tension value S3 only ignores the effect of the shock absorber on the cable force value S z The influence of, that is, the bending stiffness value EI≠0, the strain increment value ε=0, so the weight is low, w3=0.2;

[0113] Since the fourth simulated tension value S4 does not ignore the bending stiffness of the inclined cable and does not ignore the effect of the shock absorber on the cable force value S z , that is, the bending stiffness value EI≠0, the strain increment value ε≠0, so the weight is the highest, w4=0.4.

[0114] The present invention also proposes a cable-stayed bridge cable force testing device, which includes: at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can execute the cable-stayed bridge cable force testing method in the above-mentioned embodiment one.

[0115] Reference below Figure 6 , which shows a schematic diagram of the structure of a cable-stayed bridge cable force testing device suitable for implementing an embodiment of the present invention. The cable-stayed bridge cable force testing device in the embodiment of the present invention may include but is not limited to mobile terminals such as mobile phones, laptop computers, digital broadcast receivers, PDAs (Personal Digital Assistants), PADs (Portable Application Descriptions), PMPs (Portable Media Players), vehicle-mounted terminals (such as vehicle-mounted navigation terminals), etc., and fixed terminals such as digital TVs, desktop computers, etc. Figure 6 The cable-stayed bridge cable force testing device shown is only an example and should not bring any limitation to the functions and scope of use of the embodiments of the present invention.

[0116] like Figure 6As shown, the cable-stayed bridge cable force test equipment may include a processing device 1001 (such as a central processing unit, a graphics processor, etc.), which can perform various appropriate actions and processes according to a program stored in a read-only memory (ROM: Read Only Memory) 1002 or a program loaded from a storage device 1003 to a random access memory (RAM: Random Access Memory) 1004. Various programs and data required for the operation of the cable-stayed bridge cable force test equipment are also stored in the RAM 1004. The processing device 1001, the ROM 1002, and the RAM 1004 are connected to each other through a bus 1005. An input / output (I / O) interface 1006 is also connected to the bus. Typically, the following systems can be connected to the I / O interface 1006: input devices 1007 including, for example, a touch screen, a touchpad, a keyboard, a mouse, an image sensor, a microphone, an accelerometer, a gyroscope, etc.; output devices 1008 including, for example, a liquid crystal display (LCD), a speaker, a vibrator, etc.; storage devices 1003 including, for example, a magnetic tape, a hard disk, etc.; and communication devices 1009. The communication device 1009 can allow the cable-stayed bridge cable force test device to communicate wirelessly or wired with other devices to exchange data. Although the cable-stayed bridge cable force test device with various systems is shown in the figure, it should be understood that it is not required to implement or have all the systems shown. More or fewer systems may be implemented or have alternatively.

[0117] In particular, according to the embodiments disclosed in the present invention, the process described above with reference to the flowchart can be implemented as a computer software program. For example, the embodiments disclosed in the present invention include a computer program product, which includes a computer program carried on a computer-readable medium, and the computer program contains program code for executing the method shown in the flowchart. In such an embodiment, the computer program can be downloaded and installed from the network through a communication device, or installed from the storage device 1003, or installed from the ROM 1002. When the computer program is executed by the processing device 1001, the above-mentioned functions defined in the method of the embodiment disclosed in the present invention are executed.

[0118] The cable-stayed bridge cable force testing device provided by the present invention adopts the cable-stayed bridge cable force testing method in the above embodiment, and can solve the technical problem of cable-stayed bridge cable force testing. Compared with the prior art, the beneficial effects of the cable-stayed bridge cable force testing device provided by the present invention are the same as the beneficial effects of the cable-stayed bridge cable force testing method provided by the above embodiment, and other technical features in the cable-stayed bridge cable force testing device are the same as the features disclosed in the method of the previous embodiment, which will not be repeated here.

[0119] It should be understood that the various parts disclosed in the present invention can be implemented by hardware, software, firmware or a combination thereof. In the description of the above embodiments, specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

[0120] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

[0121] The present invention further proposes to provide a computer-readable storage medium having computer-readable program instructions (ie, computer program) stored thereon, wherein the computer-readable program instructions are used to execute the cable-stayed bridge cable force testing method in the above-mentioned embodiment.

[0122] The computer-readable storage medium provided by the present invention may be, for example, a USB flash drive, but is not limited to electrical, magnetic, optical, electromagnetic, infrared, or semiconductor systems or devices, or any combination thereof. More specific examples of computer-readable storage media may include, but are not limited to: an electrical connection with one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination thereof. In this embodiment, the computer-readable storage medium may be any tangible medium containing or storing a program that may be used by or in conjunction with an instruction execution system or device. The program code contained on the computer-readable storage medium may be transmitted using any appropriate medium, including, but not limited to: wires, optical cables, RF (Radio Frequency), etc., or any suitable combination thereof.

[0123] The computer-readable storage medium may be included in the cable-stayed bridge cable force testing device; or may exist independently without being assembled into the cable-stayed bridge cable force testing device.

[0124] The computer-readable storage medium carries one or more programs. When the one or more programs are executed by the cable-stayed bridge cable force testing device, the cable-stayed bridge cable force testing device executes the steps in the cable-stayed bridge cable force testing method.

[0125] Computer program code for performing the operations of the present invention may be written in one or more programming languages ​​or a combination thereof, including object-oriented programming languages ​​such as Java, Smalltalk, C++, and conventional procedural programming languages ​​such as "C" or similar programming languages. The program code may be executed entirely on the user's computer, partially on the user's computer, as a separate software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computer (e.g., through the Internet using an Internet service provider).

[0126] The flow chart and block diagram in the accompanying drawings illustrate the possible architecture, function and operation of the system, method and computer program product according to various embodiments of the present invention. In this regard, each square box in the flow chart or block diagram can represent a module, a program segment or a part of a code, and the module, the program segment or a part of the code contains one or more executable instructions for realizing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the square box can also occur in a sequence different from that marked in the accompanying drawings. For example, two square boxes represented in succession can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each square box in the block diagram and / or flow chart, and the combination of the square boxes in the block diagram and / or flow chart can be implemented with a dedicated hardware-based system that performs the specified function or operation, or can be implemented with a combination of dedicated hardware and computer instructions.

[0127] The modules involved in the embodiments of the present invention may be implemented by software or hardware, wherein the name of the module does not limit the unit itself in some cases.

[0128] The readable storage medium provided by the present invention is a computer-readable storage medium, which stores computer-readable program instructions (i.e., computer programs) for executing the above-mentioned cable-stayed bridge cable force testing method, and can solve the technical problems in the cable-stayed bridge cable force testing process. Compared with the prior art, the beneficial effects of the computer-readable storage medium provided by the present invention are the same as the beneficial effects of the cable-stayed bridge cable force testing method provided by the above-mentioned embodiment, and will not be repeated here.

[0129] The present invention also provides a computer program product, comprising a computer program, wherein when the computer program is executed by a processor, the steps of the cable-stayed bridge cable force testing method as described above are implemented.

[0130] The computer program product provided by the present invention can solve the technical problems in the cable-stayed bridge cable force test process. Compared with the prior art, the beneficial effects of the computer program product provided by the present invention are the same as the beneficial effects of the cable-stayed bridge cable force test method provided by the above embodiment, which will not be repeated here.

[0131] The above descriptions are only some embodiments of the present invention, and are not intended to limit the patent scope of the present invention. All equivalent structural changes made using the contents of the present invention's specification and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields, are included in the patent protection scope of the present invention.

Claims

1. A cable-stayed bridge cable force testing method, characterized in that: The cable-stayed bridge comprises a stay cable connected to a vibration damper; The cable-stayed bridge cable force testing method comprises: Performing a tension test on the stay cable to obtain a bending stiffness value EI of the stay cable and a strain increment value ε caused by vibration of the stay cable near an initial equilibrium position, and vibrating the stay cable to obtain a tension test value group of the stay cable; Obtaining a simulated tension value group of the stay cable according to preset conditions; According to the simulated tension value group, the cable force value S of the inclined cable is obtained. z .

2. The cable-stayed bridge cable force testing method according to claim 1, characterized in that: The preset condition is to ignore the bending stiffness of the inclined cable and the effect of the shock absorber on the cable force value S z , that is, the bending stiffness value EI=0, the strain increment value ε=0; the simulated tension value group includes a first simulated tension value S1; The step of obtaining the simulated tension value group of the inclined cable according to the preset conditions comprises: According to the preset conditions, the first simulated tension value S1 is obtained using formula 1; The formula 1 is: Wherein, m is the mass per unit length of the inclined cable, and ω i is the deadweight per unit length of the cable in the uth vibration order, l is the total length of the cable, u is the vibration order of the cable, and f i is the vibration frequency of the cable in the i-th vibration order.

3. The cable-stayed bridge cable force testing method according to claim 2, characterized in that: The preset condition is to ignore only the bending stiffness of the cable, that is, the bending stiffness value EI=0, and the strain increment value ε≠0; the simulated tension value group includes a second simulated tension value S2; The step of obtaining the simulated tension value group of the inclined cable according to the preset conditions also includes: According to the preset conditions, the second simulated tension value S2 is obtained using Formula 2; The formula 2 is: Wherein, k is the equivalent stiffness of the shock absorber.

4. The cable-stayed bridge cable force testing method according to claim 3, characterized in that: The preset condition is to only ignore the effect of the shock absorber on the cable force value S z , that is, the bending stiffness value EI≠0, the strain increment value ε=0; the simulated tension value group includes a third simulated tension value S3; The step of obtaining the simulated tension value group of the inclined cable according to the preset conditions also includes: According to the preset conditions, the third simulated tension value S3 is obtained using Formula 3; The formula three is:

5. The cable-stayed bridge cable force testing method according to claim 4, characterized in that: The preset condition is that the bending stiffness of the inclined cable is not ignored and the effect of the shock absorber on the cable force value S is not ignored. z , that is, the bending stiffness value EI≠0, the strain increment value ε≠0; the simulated tension value group includes a fourth simulated tension value S4; The step of obtaining the simulated tension value group of the inclined cable according to the preset conditions also includes: According to the preset conditions, the fourth simulated tension value S4 is obtained using Formula 4; The formula 4 is:

6. The cable-stayed bridge cable force testing method according to claim 5, characterized in that: The cable force value S of the inclined cable is obtained according to the simulated tension value group. z The steps include: According to the first simulated tension value S1, the second simulated tension value S2, the third simulated tension value S3 and the fourth simulated tension value S4, the cable force value S is obtained by using Formula 5: z ; The formula five is: <h2 style=";text-align:left;direction:ltr">S<h2 style=";text-align:left;direction:ltr"> z <h2 style=";text-align:left;direction:ltr"> = w1*S1+w2*S2+w3*S3+w4*S4 Among them, w1 is the first weight, w2 is the second weight, w3 is the third weight, and w4 is the fourth weight.

7. The cable-stayed bridge cable force testing method according to claim 6, characterized in that: The cable force value S of the inclined cable is obtained according to the simulated tension value group. z Prior to the step of, the cable-stayed bridge cable force testing method further comprises: According to the preset condition, the first weight w1, the second weight w2, the third weight w3 and the fourth weight w4 are obtained.

8. A cable-stayed bridge cable force testing device, characterized in that: The device comprises: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the computer program is configured to implement the steps of the cable-stayed bridge cable force testing method according to any one of claims 1 to 7.

9. A storage medium, characterized in that: The storage medium is a computer-readable storage medium, and a computer program is stored on the storage medium. When the computer program is executed by a processor, the steps of the cable-stayed bridge cable force testing method according to any one of claims 1 to 7 are implemented.

10. A computer program product, characterized in that The computer program product comprises a computer program, and when the computer program is executed by a processor, the steps of the cable-stayed bridge cable force testing method according to any one of claims 1 to 7 are implemented.

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