A cable stress monitoring device

Abstract

The present invention provides a cable stress monitoring device, which relates to the technical field of cable monitoring. The device is configured to obtain the installation design data of the cable for state model analysis to obtain the stress data of the cable model; obtain the real-time stress data at the stress monitoring position, and combine the stress data of the cable model for static stress monitoring analysis to form static stress monitoring result data; perform dynamic stress monitoring analysis according to the real-time stress data and in combination with the stress data of the cable model to form dynamic stress monitoring result data; and synthesize the static stress monitoring result data and the dynamic stress monitoring result data to form the cable stress monitoring result data. The device realizes a relatively accurate and comprehensive cable stress monitoring effect through the comparative analysis of the stress model parameter data and the real-time stress monitoring data based on the design data and the force-bearing big data.

Description

Technical Field

[0001] The present invention relates to the technical field of cable monitoring, and more particularly, to a cable stress monitoring device. Background Art

[0002] Cable structures are widely used in engineering fields such as construction and machinery, and have important mechanical effects. In actual situations, the stress environment of cables is relatively complex, and long-term use may cause functional failure, so it is necessary to monitor them reasonably.

[0003] Since the failure of cables is mainly caused by stress and environmental influences, it is necessary to monitor the stress of cables. Stress can not only reflect the influence of stress on cables, but also reflect the influence of temperature, humidity, etc. on cables. However, the current monitoring of cable stress is mainly a simple analysis and judgment at the static mechanics level, and it is not comprehensive.

[0004] Therefore, designing a cable stress monitoring device to achieve a more accurate and comprehensive cable stress monitoring effect through comparative analysis of stress model parameter data and real-time stress monitoring data based on design data and stress big data is an urgent problem to be solved at present. Summary of the Invention

[0005] The purpose of the present invention is to provide a cable stress monitoring device. By obtaining the installation design data of the cable, a stress model of the cable installation is established. Then, based on the model, the prestress data of the model and the stress limit information within the stress controllable range based on material properties are obtained. The stress limit information includes the limit information in the static mechanics range and the stress limit information in the dynamics aspect analyzed from big data based on different environmental conditions. During the process of real-time monitoring of the cable stress, the limit information provided by the model is used to analyze the real-time stress situation of the cable from both static and dynamic aspects, ensuring that the stress does not exceed the limit in the static state and does not cause fatigue damage beyond the allowable range due to long-term stress accumulation.

[0006] In a first aspect, the present invention provides a cable stress monitoring device, configured to: obtain cable installation design data for state model analysis to obtain cable model stress data; obtain real-time stress data at the stress monitoring position, and combine the cable model stress data for static stress monitoring analysis to form static stress monitoring result data; according to the real-time stress data, and combine the cable model stress data for dynamic stress monitoring analysis to form dynamic stress monitoring result data; synthesize the static stress monitoring result data and the dynamic stress monitoring result data to form cable stress monitoring result data.

[0007] In the present invention, the device establishes a stress model for stay cable installation by obtaining the installation design data of the stay cable, and then obtains the prestress data of the model and the stress limit information within the stress controllable range based on the material properties. The stress limit information includes the limit information in the static range and the stress limit information in the dynamic aspect analyzed based on the big data of different environmental conditions. During the process of real-time monitoring of the stress of the stay cable, the limit information provided by the model is used to analyze the real-time stress condition of the stay cable from both static and dynamic aspects, ensuring that the stress does not exceed the limit in the static state and that fatigue damage beyond the allowable range does not occur due to stress accumulation caused by long-term stress.

[0008] As a possible implementation method, obtain the installation design data of the stay cable for state model analysis and obtain the stress data of the stay cable model, including: extracting the material performance parameters in the stay cable installation design, determining the allowable tensile stress and allowable compressive stress of the stay cable; establishing a stay cable installation model according to the stay cable installation design data, and conducting a limit state analysis of the stay cable to obtain the stress data of the stay cable limit state; aggregating the allowable tensile stress, allowable compressive stress of the stay cable and the stress data of the stay cable limit state to form the stress data of the stay cable model.

[0009] In the present invention, when obtaining the stress limit information of the stay cable using the model established based on the installation design data of the stay cable, two aspects of stress limits are mainly considered. On the one hand, whether the stress exhibited by the stay cable in the static state exceeds the allowable stress value of the material defined in the design. On the other hand, for the stay cable to be stably connected, it must be in a tightened state after installation and there is a certain pre-tightening force, so there is a minimum prestress limit. Falling below the prestress limit will cause the stay cable to lose its original functional role. At the same time, the stay cable also has a stress limit determined by the design. Exceeding the limit will cause destructive phenomena such as fracture of the stay cable and loss of its use function. Only after obtaining the limit information in both aspects can the monitoring effect of the stress of the stay cable be accurately achieved in real-time stress monitoring.

[0010] As a possible implementation method, establish a stay cable installation model according to the stay cable installation design data, and conduct a limit state analysis of the stay cable to obtain the stress data of the stay cable limit state, including: extracting the prestress data for stress monitoring according to the stay cable installation model to form the prestress data of the model monitoring position; conducting a dynamic stress analysis based on the environmental effect according to the stay cable installation model to form the dynamic stress limit data of the model; aggregating the prestress data of the model monitoring position and the dynamic stress limit data of the model to form the stress data of the stay cable limit state.

[0011] In the present invention, the allowable stress of the cable is obtained mainly by determining the maximum allowable stress in combination with the mechanical properties of the cable structure and the material itself, and the safety factor of the allowable stress can be determined according to actual needs. Of course, generally speaking, the limits of the tensile stress and compressive stress of the material are different, so there are also differences in the allowable values of the tensile stress and compressive stress, and they need to be accurately determined separately. The acquisition of the stress data at the ultimate state of the cable includes the ultimate data of the prestress and the dynamic stress analysis. The prestress can be obtained through the installation model, and for the dynamic stress limit data, different environmental effects need to be considered. After all, the dynamic limit conditions of the stress are different under different stress environments.

[0012] As a possible implementation, according to the cable installation model, the prestress data for stress monitoring is extracted to form the prestress data at the model monitoring positions, including: calibrating the stress monitoring positions according to the cable installation model, and extracting the model prestress at the calibrated stress monitoring positions to form the model position prestress corresponding to different stress monitoring positions; aggregating different stress monitoring positions and the corresponding model position prestress to form the prestress data at the model monitoring positions.

[0013] In the present invention, the prestress data information can be accurately obtained according to the static stress state of the model. Of course, since the stress monitoring of the cable in practice is not carried out in a full-coverage manner, but key or main positions are selected for stress monitoring, in order to facilitate subsequent real-time monitoring analysis and comparison based on the prestress of the cable determined by the model, it is only necessary to obtain the stress data at the real-time monitoring position points as the target data, which can also reduce the amount of data storage and save resources.

[0014] As a possible implementation, according to the cable installation model, the dynamic stress analysis based on environmental effects is carried out to form the model dynamic stress limit data, including: obtaining all the single-environment load-bearing conditions of the cable corresponding to different environmental effects, and extracting the single-environment comprehensive stress change function corresponding to different single-environment load-bearing conditions of the cable , where n represents the number of different environmental effects, and m represents the number of different single-environment load-bearing conditions of the cable under the environmental effect numbered n; for the different single-environment comprehensive stress change functions , the alternating effect analysis based on the load amplitude fluctuation is carried out to determine the effective alternating working conditions existing under the environmental effect, and the limiting alternating data corresponding to the environmental effect is obtained; according to the limiting alternating data corresponding to different environmental effects, the cumulative effect analysis based on the fatigue damage effect is carried out on the cable installation model to obtain the cumulative data of the over-range fatigue damage.

[0015] In the present invention, the dynamic stress analysis of the cable installation model based on environmental effects mainly uses the historical stress change data corresponding to different environmental stress conditions for dynamic stress analysis, mainly considering whether alternating stress will occur under the corresponding stress conditions of the cable, resulting in fatigue damage exceeding the allowable range due to stress accumulation. To have fatigue damage exceeding the allowable range, two aspects need to be determined during the analysis. One is whether the stress change generated under the corresponding stress environment forms alternating stress, and the other is the cumulative effect information corresponding to the fatigue damage exceeding the allowable range under the accumulation of alternating stress. It can be understood that under the same environmental effect, such as wind blowing, vibration of different types of vibration sources, etc., although the stress application methods are the same, the magnitudes of the stresses will vary. Therefore, there are different specific environmental load conditions corresponding to the environmental effects. After obtaining the data of these environmental conditions, the corresponding stress change data is formed, which is then used as the basic data for extracting the fatigue cumulative effect of alternating stress under the corresponding environmental effect.

[0016] As a possible implementation, for the different single - time environmental comprehensive stress change functions under different environmental effects , an alternating effect analysis based on load amplitude fluctuation is carried out to determine the effective alternating working conditions existing under the environmental effect, and the restricted alternating data corresponding to the environmental effect is obtained, including: for the different single - time environmental comprehensive stress change functions corresponding to the single - time environmental load conditions, the following method is used to determine them as effective alternating working conditions: set the peak allowable deviation. For the single - time environmental comprehensive stress change function , if there are any number of clustering groups such that the difference between any two peaks in the clustering group does not exceed the peak allowable deviation, and the peaks in different clustering groups form a single - number fixed order and fixed - duration permutation combination, and different permutation combinations are periodically distributed in the time dimension, then the environmental load condition corresponding to the single - time environmental comprehensive stress change function is calibrated as an effective alternating working condition; for the single - time environmental comprehensive stress change function determined to be an effective alternating working condition , the average value of the periods corresponding to all the fixed - order and fixed - duration permutation combinations is determined as the effective alternating period of the effective alternating working condition, and the average value of the alternating - period cumulative stress of the cable at the stress monitoring position in all the fixed - order and fixed - duration permutation combinations is determined as the effective alternating stress of the effective alternating working condition; for the environmental effect with effective alternating working conditions, according to all the effective alternating working conditions, the minimum effective alternating period is determined as the restricted effective alternating period corresponding to the environmental effect, and the maximum effective alternating stress is determined as the restricted effective alternating stress corresponding to the environmental effect; the restricted effective alternating period and the restricted effective alternating stress are combined to form the restricted alternating data corresponding to the environmental effect.

[0017] In the present invention, whether there are historical environmental loading conditions under different environments that cause the cable to produce alternating stress is essentially a judgment of whether there is an alternating situation in the force formation of a single environmental loading condition. If the force is alternating, the load will show a periodic change with a certain stability in the time dimension. Therefore, by analyzing whether the force of the cable shows a stable periodic change in the time dimension, it can be determined whether the corresponding working condition belongs to the alternating type. Here, although the alternation of the load is considered to be stable, there will be certain practical factors, data collection, data processing, etc. in actual situations, which will cause reasonable errors in the peak and period of the alternating load. Therefore, it is more reasonable to provide the judgment criteria including the peak allowable deviation, fixed duration, cycle duration, etc. in the form of a range for judgment during analysis. The specific range size can be set according to the actual situation, or it can be determined based on big data analysis. After determining that there are effective alternating working conditions under environmental effects, the effective alternating cycles and effective alternating stresses corresponding to different alternating working conditions are extracted. Considering that the stress modes of different working conditions under the same environmental effects are the same, the cumulative effect of the alternating working conditions on fatigue damage under this mode will cause different efficiencies due to the different alternating cycles and alternating stresses. In order to facilitate the subsequent acquisition of boundary information of the cumulative effect of fatigue damage beyond the allowable range, the cycles of different working conditions under environmental effects are taken as the effective alternating cycles, and the average of the average stress accumulation values ​​under a single cycle of different working conditions is taken as the effective alternating stress, so that the corresponding boundary information can be quickly determined in subsequent analysis. Of course, it should also be noted that although different environmental effects have different stress modes on the cables, due to the single stress state of the cables themselves, which are mainly tension and compression, even loads perpendicular to the cable axis will cause the cables to produce tensile stress and compressive stress, and the influence of shear force will be less due to the deformation of the material and the non-contact stress. Therefore, the accumulation of fatigue damage caused by alternating loads generated by different environmental effects on cables is nothing more than the change in cumulative efficiency and the difference in cumulative amount, as well as the difference in the initial location of fatigue damage that exceeds the allowable limit. However, it is certain that the fatigue properties of the material will not change due to environmental conditions. Therefore, it is reasonable to use the minimum value of the effective alternating cycle and the maximum value of the effective alternating stress under different environmental effects as the basic input parameters for fatigue damage analysis of the cable model without considering the difference in environmental effects. In addition, the smaller the cycle, the faster the accumulation frequency, and the greater the alternating stress per unit cycle, the greater the accumulation amount. Therefore, the alternating characteristic information obtained based on big data is a state information that is relatively close to the boundary value of the allowable fatigue damage range, which is conducive to the subsequent extraction of corresponding boundary characteristic data based on model analysis.

[0018] As a possible implementation, based on the restricted alternating data corresponding to different environmental effects, the cumulative effect analysis of the cable installation model based on the fatigue damage effect is carried out to obtain the cumulative data of out-of-range fatigue damage, including: for different environmental effects, taking the restricted effective alternating cycle as the fixed fatigue analysis cycle of fatigue damage and the restricted effective alternating stress as the initial cycle stress, the fatigue damage analysis of the cable installation model with a one-way continuous change of the initial cycle stress is carried out. When the initial cycle stress is adjusted to just cause out-of-range fatigue damage in the cable installation model, the cycle stress corresponding to different position points at the stress monitoring position is determined as the out-of-range fatigue cycle stress limit value of the position point, and the total stress accumulation amount at different position points of the stress monitoring position over the entire duration is obtained to form the total model environment accumulation amount of the position point; the out-of-range fatigue cycle stress limit values and the total model environment accumulation amount corresponding to the monitoring position under different environmental effects are combined to form the out-of-range fatigue damage cumulative data corresponding to the environmental effects.

[0019] In the present invention, after obtaining the alternating stress information based on big data according to different environmental effects, the alternating stress information is used as the initial input for the fatigue damage analysis of the model, and the input conditions are continuously changed to determine the boundary value of the out-of-allowable fatigue damage range. It should be noted that for fatigue damage, the shorter the cycle, the greater the stress accumulation per unit time, and the easier it is to occur fatigue damage. Therefore, the change of the effective alternating cycle is gradually adjusted to a larger value. After all, the smallest cycle under historical data is the effective alternating cycle, and the cycle time will not be shorter. For the effective alternating stress, it needs to be adjusted in two directions, larger or smaller. After all, the stress accumulation per unit time reaches a certain volume to cause fatigue damage. Even if the alternating cycle is shorter before reaching this volume, it cannot be effectively accumulated. In this way, the cycle and the cumulative boundary amount of the alternating stress when the cable exceeds the allowable fatigue damage range are determined as the limit boundary of the stress under dynamic analysis. Of course, after determining the limit boundary, considering that the cable in kind is an object with size and volume, the cumulative effect will be different at different positions. Therefore, for the convenience of real-time monitoring and analysis, the stress data at the monitoring position corresponding to the limit boundary is extracted to form the target data required for monitoring.

[0020] As a possible implementation method, real-time stress data at the stress monitoring position is obtained, and static stress monitoring and analysis are carried out in combination with the stress data of the cable model to form static stress monitoring result data, including: obtaining the position stress relationship information of the stress value changing with the position at the stress monitoring position according to the real-time stress data; extracting the real-time maximum tensile stress, real-time minimum tensile stress, real-time maximum compressive stress and real-time minimum compressive stress in the position stress relationship information; according to the real-time maximum tensile stress, real-time maximum compressive stress, real-time minimum tensile stress and real-time minimum compressive stress, and combining the allowable tensile stress, allowable compressive stress and prestress data of the model monitoring position, the following analysis and judgment are carried out: if the real-time maximum compressive stress does not exceed the allowable tensile stress, the real-time maximum compressive stress does not exceed the allowable compressive stress, and for the position corresponding to the real-time minimum tensile stress, the corresponding prestress extracted from the prestress data of the model monitoring position is not greater than the real-time minimum tensile stress, and for the position corresponding to the real-time minimum compressive stress, the corresponding prestress extracted from the prestress data of the model monitoring position is not greater than the real-time minimum compressive stress, then real-time static stress value normal information is formed, otherwise real-time static stress value abnormal information is formed; setting a stress change gradient limit value, extracting the real-time stress change gradient between adjacent positions according to the position stress relationship information and carrying out the following analysis and judgment: if all real-time stress change gradients do not exceed the stress change gradient limit value, then real-time static stress gradient normal information is formed; if there is a real-time stress change gradient exceeding the stress change gradient limit value, then real-time static stress gradient abnormal information is formed.

[0021] In the present invention, during the real-time monitoring process, mainly the data of the stress value changing with time at the monitoring position is extracted. When carrying out the analysis and judgment of the static stress, mainly the limit values in the variable data are obtained for comparative analysis with the allowable tensile stress, allowable compressive stress and prestress. Of course, it should also be noted that under normal circumstances, the distribution and change of stress are uniform. Therefore, the stress change gradient of adjacent position points in a continuous region is also within a reasonable range. Furthermore, it is necessary to confirm the gradient situation to avoid local stress damage caused by too large stress change. Of course, for two discontinuous position points, the gradient can also be confirmed through the position information. The stress change gradient limit value can be set according to the actual situation or determined based on big data analysis.

[0022] As a possible implementation, based on the real-time stress data and combined with the cable model stress data, dynamic stress monitoring and analysis are carried out to form dynamic stress monitoring result data, including: obtaining the stress change information of the stress monitoring position during the entire real-time monitoring duration according to the real-time stress data; extracting the stress change information of any position point to form a real-time stress change function of the position point; performing an alternating effect analysis based on amplitude fluctuation on the real-time stress change function of the position point: if the real-time stress change function of the position point is a non-alternating function, real-time dynamic stress normal information is formed; if the real-time stress change function of the position point is an alternating function, fatigue stress analysis based on the over-range fatigue damage cumulative data is carried out to form a real-time dynamic fatigue stress monitoring result.

[0023] In the present invention, during real-time monitoring, for the monitoring and analysis of dynamic stress, it is mainly to first determine whether the stress change has an alternating characteristic, and then perform a comparative analysis on the stress data with an alternating characteristic based on the over-range fatigue damage cumulative data. Here, considering the possible differences in stress change data at different position points, since the analysis is based on the stress change data of the position point as the basis for judging the alternating characteristic, of course, the alternating characteristic of a single position point also represents that the stress of the entire cable has an alternating characteristic, and a certain number of position points can also be specified for extraction to ensure the accuracy of the analysis. The judgment of the alternating characteristic is the same as that for the dynamic stress analysis of the model, mainly considering that the data with obvious periodic characteristics such as the peak difference and cycle stability are within a reasonable range to be considered as having an alternating characteristic.

[0024] As a possible implementation, if the real-time stress change function of the position point is an alternating function, fatigue stress analysis based on the over-range fatigue damage cumulative data is carried out to form a real-time dynamic fatigue stress monitoring result, including: obtaining the real-time periodic stress and the total real-time stress accumulation amount corresponding to the real-time stress change function of the position point, and combining the over-range fatigue periodic stress limit value and the total over-range fatigue damage stress accumulation amount of the corresponding position point in the over-range fatigue damage cumulative data, and performing the following analysis and judgment: if the real-time periodic stress is not less than the over-range fatigue periodic stress limit value, and the total real-time stress accumulation amount is not less than the total over-range fatigue damage stress accumulation amount, real-time fatigue damage over-limit information is formed, otherwise real-time fatigue damage non-over-limit information is formed.

[0025] In the present invention, the comparative analysis of the real-time stress change data with an alternating characteristic and the over-range fatigue damage cumulative data is also to compare the periodic stress value and the cumulative total amount at the corresponding position point. Only when neither reaches the limit value can it be determined that the dynamic stress monitoring does not show abnormal stress results. Here, multiple position points can also be selected for verification to ensure the accuracy of the analysis result.

[0026] The beneficial effects of a cable stress monitoring device provided by the present invention are:

[0027] The device establishes a stress model for the cable installation by obtaining the installation design data of the cable. Then, based on the model, the prestress data of the model and the stress limit information within the stress controllable range based on the material properties are obtained. The stress limit information includes the limit information in the static range and the stress limit information in the dynamic aspect analyzed from the big data based on different environmental conditions. During the real-time monitoring of the cable stress, the limit information provided by the model is used to analyze the real-time stress condition of the cable from both static and dynamic aspects, ensuring that the stress does not exceed the limit in the static state and that fatigue damage beyond the allowable range does not occur due to long-term stress accumulation caused by the long-term force application. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments of the present invention will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0029] Figure 1 It is a working implementation step diagram of the cable stress monitoring device provided by the embodiment of the present invention;

[0030] Figure 2 It is a schematic structural diagram of the cable stress monitoring device provided by the embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0031] The technical solutions in the embodiments of the present invention will be described below with reference to the drawings in the embodiments of the present invention.

[0032] Cable structures are widely used in engineering fields such as construction and machinery and have important mechanical effects. In actual situations, the stress environment of the cable is relatively complex, and long-term use will cause functional failure, so it is necessary to monitor it reasonably.

[0033] Since the failure of the cable is mainly caused by stress and environmental influences, it is necessary to monitor the stress of the cable. Stress can not only reflect the influence of stress on the cable but also reflect the influence of temperature, humidity, etc. on the cable. However, the current monitoring of cable stress is mainly a simple analysis and judgment at the static level and is not comprehensive.

[0034] Reference Figures 1 to 2, an embodiment of the present invention provides a cable stress monitoring device. The device establishes a force model for cable installation by obtaining the installation design data of the cable, and then obtains the prestress data of the model and the stress limit information within the stress controllable range based on material properties from the model. The stress limit information includes the limit information in the static range and the stress limit information in the dynamic aspect analyzed from big data based on different environmental conditions. During the process of real-time monitoring of the cable stress, the limit information provided by the model is used to analyze the real-time stress condition of the cable from both static and dynamic aspects, ensuring that the stress does not exceed the limit in the static state and that fatigue damage exceeding the allowable range does not occur due to long-term stress accumulation caused by the force action.

[0035] The cable stress monitoring device is specifically configured in the following steps:

[0036] S1: Obtain the installation design data of the cable for state model analysis to obtain the cable model stress data.

[0037] Obtain the installation design data of the cable for state model analysis to obtain the cable model stress data, including: extracting the material property parameters in the cable installation design, determining the allowable tensile stress and allowable compressive stress of the cable; establishing a cable installation model according to the cable installation design data, and conducting a cable ultimate state analysis to obtain the cable ultimate state stress data; aggregating the allowable tensile stress, allowable compressive stress of the cable and the cable ultimate state stress data to form the cable model stress data.

[0038] When obtaining the cable stress limit information using the model established based on the cable installation design data, two aspects of stress limits are mainly considered. On the one hand, it is whether the stress exhibited by the cable in the static state exceeds the allowable stress value of the material defined in the design. On the other hand, for the cable to be stably connected, it must be in a tightened state after installation and has a certain pre-tightening force, thus having a minimum prestress limit. Falling below the prestress limit will cause the cable to lose its original functional role. At the same time, the cable also has a stress limit determined by the design. Exceeding the limit will cause the cable to break and other destructive phenomena and lose its use function. Only after obtaining the limit information in both aspects can the monitoring effect of the cable stress be accurately achieved in real-time stress monitoring.

[0039] Establish a cable installation model according to the cable installation design data, and conduct a cable ultimate state analysis to obtain the cable ultimate state stress data, including: extracting the prestress data for stress monitoring according to the cable installation model to form the prestress data at the model monitoring position; conducting a dynamic stress analysis based on environmental effects according to the cable installation model to form the dynamic stress limit data of the model; aggregating the prestress data at the model monitoring position and the dynamic stress limit data of the model to form the cable ultimate state stress data.

[0040] The acquisition of the allowable stress of the stay cable mainly involves determining the maximum allowable stress in combination with the mechanical properties of the stay cable structure and the material itself. The safety factor of the allowable stress can be determined according to actual needs. Of course, generally speaking, the limits of the tensile stress and compressive stress of the material are different, so there are also differences in the allowable values for tensile stress and compressive stress, and they need to be accurately determined separately. The acquisition of the stress data at the ultimate state of the stay cable includes the ultimate data of prestress and stress dynamic analysis. The prestress can be obtained through the installation model, and for the dynamic stress limit data, different environmental effects need to be considered. After all, the dynamic limit of stress is different under different stress environments.

[0041] According to the stay cable installation model, extract the prestress data for stress monitoring to form the prestress data at the model monitoring positions, including: calibrate the stress monitoring positions according to the stay cable installation model, and extract the model prestress at the calibrated stress monitoring positions to form the model position prestress corresponding to different stress monitoring positions; aggregate the different stress monitoring positions and the corresponding model position prestress to form the prestress data at the model monitoring positions.

[0042] The prestress data information can be accurately obtained according to the static stress state of the model. Of course, since the stress monitoring of the stay cable in practice is not carried out in a full-coverage manner, but key or main positions are selected for stress monitoring, in order to facilitate subsequent real-time monitoring analysis and comparison based on the prestress of the stay cable determined by the model, it is only necessary to obtain the stress data at the real-time monitoring position points as the target data. This can also reduce the amount of data storage and save resources.

[0043] According to the stay cable installation model, conduct a stress dynamic analysis based on environmental effects to form the model dynamic stress limit data, including: obtain all the single environmental loading conditions of the stay cable corresponding to different environmental effects, and extract the single environmental comprehensive force change function corresponding to different single environmental loading conditions of the stay cable , where n represents the number of different environmental effects, and m represents the number of different single environmental loading conditions of the stay cable under the environmental effect numbered n; for the different single environmental comprehensive force change functions , conduct an alternating effect analysis based on the load amplitude fluctuation to determine the effective alternating working conditions existing under the environmental effect, and obtain the limiting alternating data corresponding to the environmental effect; according to the limiting alternating data corresponding to different environmental effects, conduct an accumulative effect analysis based on the fatigue damage effect on the stay cable installation model to obtain the cumulative data of over-range fatigue damage.

[0044] The dynamic stress analysis of the cable installation model based on environmental effects mainly uses the historical stress change data corresponding to different environmental loading conditions for dynamic stress analysis. It mainly considers whether alternating stress will occur under the corresponding loading conditions of the cable, resulting in fatigue damage caused by stress accumulation exceeding the allowable range. To have fatigue damage exceeding the allowable range, two aspects need to be determined during the analysis. One is whether the stress change generated under the corresponding loading environment forms alternating stress, and the other is the cumulative effect information corresponding to the fatigue damage exceeding the allowable range under the accumulation of alternating stress. It can be understood that under the same environmental effect, such as wind blowing, vibration of different types of vibration sources, etc., although the loading methods are the same, the magnitudes of the loads will vary. Therefore, there are different specific environmental loading conditions corresponding to the environmental effect. After obtaining the data of these environmental conditions, the corresponding stress change data is formed, which is then used as the basic data for extracting the fatigue cumulative effect of alternating stress under the corresponding environmental effect.

[0045] For the different single - time environmental comprehensive stress change functions under different environmental effects , conduct an alternating effect analysis based on the load amplitude fluctuation to determine the effective alternating working conditions existing under the environmental effect, and obtain the restricted alternating data corresponding to the environmental effect, including: for the different single - time environmental comprehensive stress change functions corresponding to the single - time environmental loading conditions, determine them as effective alternating working conditions through the following method: set the peak allowable deviation. For the single - time environmental comprehensive stress change function , if there are any number of clustering groups such that the difference between any two peaks in the clustering group does not exceed the peak allowable deviation, and the peaks in different clustering groups form a single - number fixed order and fixed - duration permutation combination, and different permutation combinations are periodically distributed in the time dimension, then the environmental loading condition corresponding to the single - time environmental comprehensive stress change function is calibrated as an effective alternating working condition; for the single - time environmental comprehensive stress change function determined as an effective alternating working condition , determine the average value of the periods corresponding to all the fixed - order and fixed - duration permutation combinations as the effective alternating period of the effective alternating working condition, and determine the average value of the alternating - period cumulative stress of the cable at the stress monitoring position in all the fixed - order and fixed - duration permutation combinations as the effective alternating stress of the effective alternating working condition; for the environmental effect with effective alternating working conditions, according to all the effective alternating working conditions, determine the minimum effective alternating period as the restricted effective alternating period corresponding to the environmental effect, and determine the maximum effective alternating stress as the restricted effective alternating stress corresponding to the environmental effect; combine the restricted effective alternating period and the restricted effective alternating stress to form the restricted alternating data corresponding to the environmental effect.

[0046] Whether there are historical environmental loading conditions in different environments that cause the cables to produce alternating stresses is essentially a judgment of whether there is an alternating situation in the force formation of a single environmental loading condition. If the force is alternating, the load will show a periodic change with a certain stability in the time dimension. Therefore, by analyzing whether the force of the cable shows a stable periodic change in the time dimension, it can be determined whether the corresponding working condition belongs to the alternating type. Here, although the alternation of the load is considered to be stable, there will be certain practical factors, data collection, data processing, etc. in actual situations, which will cause reasonable errors in the peak and period of the alternating load. Therefore, it is more reasonable to provide the judgment criteria such as the peak allowable deviation, fixed duration, and cycle duration in the form of a range for judgment. The specific range size can be set according to the actual situation, or it can be determined based on big data analysis. After determining that there are effective alternating working conditions under environmental effects, the effective alternating cycles and effective alternating stresses corresponding to different alternating working conditions are extracted. Considering that the stress modes of different working conditions under the same environmental effects are the same, the cumulative effect of the alternating working conditions on fatigue damage under this mode will cause different efficiencies due to the different alternating cycles and alternating stresses. In order to facilitate the subsequent acquisition of boundary information of the cumulative effect of fatigue damage beyond the allowable range, the cycles of different working conditions under environmental effects are taken as the effective alternating cycles, and the average of the average stress accumulation values ​​under a single cycle of different working conditions is taken as the effective alternating stress, so that the corresponding boundary information can be quickly determined in subsequent analysis. Of course, it should also be noted that although different environmental effects have different stress modes on the cables, due to the single stress state of the cables themselves, which are mainly tension and compression, even loads perpendicular to the cable axis will cause the cables to produce tensile stress and compressive stress, and the influence of shear force will be less due to the deformation of the material and the non-contact stress. Therefore, the accumulation of fatigue damage caused by alternating loads generated by different environmental effects on cables is nothing more than the change in cumulative efficiency and the difference in cumulative amount, as well as the difference in the initial location of fatigue damage that exceeds the allowable limit. However, it is certain that the fatigue properties of the material will not change due to environmental conditions. Therefore, it is reasonable to use the minimum value of the effective alternating cycle and the maximum value of the effective alternating stress under different environmental effects as the basic input parameters for fatigue damage analysis of the cable model without considering the difference in environmental effects. In addition, the smaller the cycle, the faster the accumulation frequency, and the greater the alternating stress per unit cycle, the greater the accumulation amount. Therefore, the alternating characteristic information obtained based on big data is a state information that is relatively close to the boundary value of the allowable fatigue damage range, which is conducive to the subsequent extraction of corresponding boundary characteristic data based on model analysis.

[0047] Based on the restricted alternating data corresponding to different environmental effects, perform an analysis of the cumulative effect based on fatigue damage on the cable installation model to obtain the cumulative data of over-range fatigue damage, including: for different environmental effects, use the restricted effective alternating cycle as the fixed fatigue analysis cycle for fatigue damage, and the restricted effective alternating stress as the starting cycle stress. Conduct a fatigue damage analysis on the cable installation model with a continuous change in the single direction of the starting cycle stress. When the starting cycle stress is adjusted until the cable installation model just shows fatigue damage beyond the allowable range, determine the cycle stress corresponding to different position points at the stress monitoring position as the over-range fatigue cycle stress limit value of the position point, and obtain the total stress accumulation at different position points at the stress monitoring position over the entire duration to form the total cumulative amount of the model environment at the position point; collect the over-range fatigue cycle stress limit values and the total cumulative amount of the model environment corresponding to the monitoring position under different environmental effects to form the over-range fatigue damage cumulative data corresponding to the environmental effects.

[0048] After obtaining the alternating force information based on big data according to different environmental effects, use the alternating force information as the initial input for fatigue damage analysis of the model, and continuously change the input conditions to determine the boundary value of the over-allowable fatigue damage range. It should be noted that for fatigue damage, the shorter the cycle, the greater the stress accumulation per unit time, and the easier it is to occur fatigue damage. Therefore, the change in the effective alternating cycle is gradually adjusted towards a larger value. After all, the smallest cycle under historical data is the effective alternating cycle, and the cycle time will not be shorter. For the effective alternating stress, it needs to be adjusted in two directions, larger or smaller. After all, the stress accumulation per unit time reaches a certain volume to cause fatigue damage. Even if the alternating cycle is shorter before reaching this volume, it cannot be effectively accumulated. In this way, determine the cycle and the cumulative boundary amount of the alternating stress when the cable exceeds the allowable fatigue damage range as the limit boundary of the stress under dynamic analysis. Of course, after determining the limit boundary, considering that the physical cable is an object with size and volume, the cumulative effect will be different at different positions. Therefore, for the convenience of real-time monitoring and analysis, extract the stress data at the monitoring position corresponding to the limit boundary to form the target data required for monitoring.

[0049] S2: Obtain the real-time stress data at the stress monitoring position, and combine it with the stress data of the cable model to perform static stress monitoring analysis to form static stress monitoring result data.

[0050] Obtain the real-time stress data at the stress monitoring positions, and combine it with the stress data of the cable model for static stress monitoring analysis to form static stress monitoring result data, including: Obtain the position stress relationship information of the stress value changing with position at the stress monitoring positions according to the real-time stress data; Extract the real-time maximum tensile stress, real-time minimum tensile stress, real-time maximum compressive stress, and real-time minimum compressive stress from the position stress relationship information; According to the real-time maximum tensile stress, real-time maximum compressive stress, real-time minimum tensile stress, and real-time minimum compressive stress, and combine with the allowable tensile stress, allowable compressive stress, and prestress data of the model monitoring positions to conduct the following analysis and judgment: If the real-time maximum compressive stress does not exceed the allowable tensile stress, the real-time maximum compressive stress does not exceed the allowable compressive stress, and for the position corresponding to the real-time minimum tensile stress, the corresponding prestress extracted from the prestress data of the model monitoring positions is not greater than the real-time minimum tensile stress, and for the position corresponding to the real-time minimum compressive stress, the corresponding prestress extracted from the prestress data of the model monitoring positions is not greater than the real-time minimum compressive stress, then form real-time static stress value normal information, otherwise form real-time static stress value abnormal information; Set the stress change gradient limit value, extract the real-time stress change gradient between adjacent positions according to the position stress relationship information and conduct the following analysis and judgment: If all real-time stress change gradients do not exceed the stress change gradient limit value, then form real-time static stress gradient normal information; If there is a real-time stress change gradient exceeding the stress change gradient limit value, then form real-time static stress gradient abnormal information.

[0051] During the real-time monitoring process, mainly extract the data of the stress value changing with time at the monitoring positions. When conducting the analysis and judgment of static stress, mainly obtain the extreme values in the variable data for comparison and analysis with the allowable tensile stress, allowable compressive stress, and prestress. Of course, it should also be noted that under normal circumstances, the distribution and change of stress are uniform. Therefore, the stress change gradient of adjacent position points in a continuous region is also within a reasonable range. Furthermore, it is necessary to confirm the gradient situation to avoid local stress damage caused by too large stress changes. Of course, for two discontinuous position points, the gradient can also be confirmed through the position information. The stress change gradient limit value can be set according to the actual situation or determined based on big data analysis.

[0052] S3: According to the real-time stress data, and combine it with the stress data of the cable model for dynamic stress monitoring analysis to form dynamic stress monitoring result data.

[0053] Based on the real-time stress data and combined with the stress data of the cable model, dynamic stress monitoring and analysis are carried out to form dynamic stress monitoring result data, including: obtaining the stress change information of the stress monitoring position during the entire real-time monitoring duration according to the real-time stress data; extracting the stress change information of any position point to form a real-time stress change function of the position point; performing an alternating effect analysis based on the amplitude fluctuation on the real-time stress change function of the position point: if the real-time stress change function of the position point is a non-alternating function, real-time dynamic stress normal information is formed; if the real-time stress change function of the position point is an alternating function, fatigue stress analysis based on the over-range fatigue damage accumulation data is carried out to form a real-time dynamic fatigue stress monitoring result.

[0054] During real-time monitoring, the monitoring and analysis of dynamic stress mainly first determine whether the stress change has an alternating characteristic, and then conduct a comparative analysis of the stress data with alternating characteristics based on the over-range fatigue damage accumulation data. Here, considering that there may be differences in stress change data at different position points, because the analysis is based on the stress change data of the position point as the basis for judging the alternating characteristic. Of course, the alternating characteristic of a single position point also represents that the stress of the entire cable has an alternating characteristic, and a certain number of position points can also be specified for extraction to ensure the accuracy of the analysis. The judgment of the alternating characteristic is the same as that of the dynamic stress analysis of the model, mainly considering that data with obvious periodic characteristics such as the difference in peak values and the stability of the period are within a reasonable range to be considered as having an alternating characteristic.

[0055] If the real-time stress change function of the position point is an alternating function, fatigue stress analysis based on the over-range fatigue damage accumulation data is carried out to form a real-time dynamic fatigue stress monitoring result, including: obtaining the real-time periodic stress and the total real-time stress accumulation amount corresponding to the real-time stress change function of the position point, and combining the over-range fatigue periodic stress limit value and the total over-range fatigue damage stress accumulation amount of the corresponding position point in the over-range fatigue damage accumulation data, and performing the following analysis and judgment: if the real-time periodic stress is not less than the over-range fatigue periodic stress limit value, and the total real-time stress accumulation amount is not less than the total over-range fatigue damage stress accumulation amount, real-time fatigue damage over-limit information is formed, otherwise real-time fatigue damage non-over-limit information is formed.

[0056] The comparative analysis of the real-time stress change data with alternating characteristics and the over-range fatigue damage accumulation data is also to compare the periodic stress values and the total accumulation amounts at the corresponding position points. Only when neither reaches the limit value can it be determined that there is no stress abnormality in the dynamic stress monitoring. Here, multiple position points can also be selected for verification to ensure the accuracy of the analysis result.

[0057] S4: Integrate the static stress monitoring result data and the dynamic stress monitoring result data to form the cable stress monitoring result data.

[0058] Only when both the static stress monitoring results and the dynamic stress monitoring results show normal can it be considered that the stay cable is in a normal working state.

[0059] This application also provides the specific composition of the device. It includes a data acquisition unit for acquiring the installation design data of the stay cable, the force change data corresponding to different working conditions under different environmental effects, and the real-time stress data; a feature extraction unit for obtaining the stay cable model stress data according to the installation design data of the stay cable and the force change data corresponding to different working conditions under different environmental effects acquired by the data acquisition unit; and a real-time monitoring and analysis unit for performing monitoring and analysis based on the adaptability stress data acquired by the data acquisition unit and combining with the stay cable model stress data formed by the feature extraction unit to form the stay cable stress monitoring result data.

[0060] The system provided by this application also includes a specific stress acquisition method. To ensure the comprehensiveness and representativeness of the monitored and acquired data, the acquisition positions are mainly along the axis direction of the stay cable. Of course, multiple acquisition positions along the axis direction can also be set in the circumferential direction of the stay cable. The acquisition form can be a fiber Bragg grating sensor or a strain gauge, etc.

[0061] In summary, the beneficial effects of a stay cable stress monitoring device provided by an embodiment of the present invention are as follows:

[0062] This device establishes a force model for the installation of the stay cable by obtaining the installation design data of the stay cable, and then obtains the prestress data of the model and the stress limit information within the stress controllable range based on the material characteristics. The stress limit information includes the limit information in the static range and the stress limit information in the dynamic aspect analyzed from big data based on different environmental conditions. During the real-time monitoring of the stress of the stay cable, the limit information provided by the model is used to analyze the real-time stress condition of the stay cable from both static and dynamic aspects, ensuring that the stress does not exceed the limit in the static state and will not cause fatigue damage beyond the allowable range due to long-term force accumulation.

[0063] In the embodiments of the present application, "indication" may include direct indication and indirect indication, and may also include explicit indication and implicit indication. If the information indicated by a certain piece of information is called the information to be indicated, then in the specific implementation process, there are many ways to indicate the information to be indicated. For example, but not limited to, the information to be indicated can be directly indicated, such as the information to be indicated itself or the index of the information to be indicated, etc. It is also possible to indirectly indicate the information to be indicated by indicating other information, where there is an association relationship between the other information and the information to be indicated. It is also possible to only indicate a part of the information to be indicated, while the other parts of the information to be indicated are known or pre-agreed. For example, it is also possible to achieve the indication of specific information by means of the arrangement order of each piece of information pre-agreed (such as stipulated in the protocol), thereby reducing the indication overhead to a certain extent. At the same time, it is also possible to identify the common parts of each piece of information and uniformly indicate them to reduce the indication overhead caused by separately indicating the same information.

[0064] In addition, the specific indication method can also be various existing indication methods, such as, but not limited to, the above-mentioned indication methods and their various combinations, etc. The specific details of various indication methods can refer to the prior art and will not be elaborated herein. As can be seen from the above description, for example, when it is necessary to indicate multiple pieces of information of the same type, there may be a situation where the indication methods of different pieces of information are different. In the specific implementation process, the required indication method can be selected according to specific needs. The embodiments of the present application do not limit the selected indication method. In this way, the indication methods involved in the embodiments of the present application should be understood to cover various methods that can enable the party to be indicated to obtain the information to be indicated.

[0065] It should be understood that the information to be indicated can be sent as a whole or divided into multiple sub-information and sent separately, and the sending periods and / or sending timings of these sub-information can be the same or different. The specific sending method is not limited in the embodiments of the present application. Among them, the sending periods and / or sending timings of these sub-information can be predefined, such as predefined according to the protocol, or can be configured by the sending device by sending configuration information to the receiving device.

[0066] "Predefined" or "preconfigured" can be implemented by pre-saving corresponding codes, tables or other ways that can be used to indicate relevant information in the device. The embodiments of the present application do not limit its specific implementation method. Among them, "saving" can mean saving in one or more memories. The one or more memories can be separately set, or can be integrated in an encoder or decoder, a processor, or a communication device. The one or more memories can also be partly separately set and partly integrated in a decoder, a processor, or a communication device. The type of the memory can be any form of storage medium, which is not limited in the embodiments of the present application.

[0067] The "protocol" involved in the embodiments of the present application may refer to a protocol family in the communication field, a standard protocol with a frame structure similar to that of a protocol family, or a related protocol applied to future communication systems. The embodiments of the present application do not make specific limitations thereto.

[0068] In the embodiments of the present application, descriptions such as "when...", "in the case of...", "if", and "when" all refer to the situation where the device will perform corresponding processing under a certain objective condition, rather than limiting the time, and it is not required that the device must have a judgment action during implementation, nor does it mean that there are other limitations.

[0069] In the description of the embodiments of the present application, unless otherwise specified, " / " means that the objects associated before and after are in an "or" relationship. For example, A / B may represent A or B; the "and / or" in the embodiments of the present application is only a description of the association relationship of the associated objects, indicating that three relationships may exist. For example, A and / or B may represent: A exists alone, A and B exist simultaneously, and B exists alone. Here, A and B may be singular or plural. Also, in the description of the embodiments of the present application, unless otherwise specified, "a plurality of" means two or more than two. "At least one (item)" or its similar expression refers to any combination of these items, including any combination of single item (item) or plural items (items). For example, at least one (item) of a, b, or c may represent: a, b, c, a - b, a - c, b - c, or a - b - c, where a, b, and c may be single or multiple. In addition, for the convenience of clearly describing the technical solutions of the embodiments of the present application, in the embodiments of the present application, terms such as "first" and "second" are used to distinguish the same items or similar items with basically the same functions and effects. Those skilled in the art can understand that the terms "first", "second", etc. do not limit the quantity and execution order, and the terms "first", "second", etc. do not necessarily limit to be different. At the same time, in the embodiments of the present application, words such as "exemplary" or "for example" are used to represent examples, illustrations, or explanations. Any embodiment or design solution described as "exemplary" or "for example" in the embodiments of the present application should not be construed as being more preferred or having more advantages than other embodiments or design solutions. Exactly speaking, using words such as "exemplary" or "for example" aims to present relevant concepts in a specific way for easy understanding.

[0070] It should be understood that the processor in the embodiments of the present application may be a central processing unit (CPU), and the processor may also be other general-purpose processors, digital signal processors (DSPs), application specific integrated circuits (ASICs), field programmable gate arrays (FPGAs) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor or the processor may also be any conventional processor, etc.

[0071] It should also be understood that the memory in the embodiments of the present application may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memories. Among them, the non-volatile memory may be a read-only memory (ROM), a programmable ROM (PROM), an erasable PROM (EPROM), an electrically erasable PROM (EEPROM) or a flash memory. The volatile memory may be a random access memory (RAM), which is used as an external cache. By way of example but not limitation, many forms of random access memory (RAM) are available, such as static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), synchlink DRAM (SLDRAM) and direct rambus RAM (DR RAM).

[0072] The above embodiments can be implemented in whole or in part by software, hardware (such as circuits), firmware, or any combination thereof. When implemented using software, the above embodiments can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions or computer programs. When the computer instructions or computer programs are loaded or executed on a computer, the processes or functions described in the embodiments of the present application are generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, the computer instructions can be transmitted from one website, computer, server, or data center to another website, computer, server, or data center by wired (such as infrared, wireless, microwave, etc.) means. The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device such as a server or data center that contains one or more collections of available media. The available media can be magnetic media (such as floppy disks, hard disks, magnetic tapes), optical media (such as DVDs), or semiconductor media. The semiconductor media can be a solid-state drive.

[0073] It should be understood that the term "and / or" in this document is merely a description of the association relationship between associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. Here, A and B can be singular or plural. In addition, the character " / " in this document generally represents an "or" relationship between the associated objects before and after, but it may also represent an "and / or" relationship, which can be specifically understood with reference to the context.

[0074] In this application, "at least one" means one or more, and "a plurality" means two or more. "At least one of the following" or its similar expressions refer to any combination of these items, including any combination of single items or plural items. For example, at least one of a, b, or c can represent: a, b, c, a - b, a - c, b - c, or a - b - c, where a, b, and c can be single or multiple.

[0075] It should be understood that in various embodiments of the present application, the sequence numbers of the above processes do not imply the order of execution. The order of execution of each process should be determined by its function and internal logic, and should not constitute any limitation to the implementation process of the embodiments of the present application.

[0076] Those of ordinary skill in the art will appreciate that the units and algorithm steps of each example described in connection with the embodiments disclosed herein can be implemented in electronic hardware, or in a combination of computer software and electronic hardware. Whether these functions are executed in hardware or software depends on the specific application and design constraints of the technical solution. Skilled professionals can use different methods for each specific application to implement the described functions, but such implementation should not be considered to exceed the scope of this application.

[0077] Those skilled in the art can clearly understand that for the convenience and brevity of description, the specific working processes of the systems, devices, and units described above can refer to the corresponding processes in the foregoing method embodiments and will not be elaborated herein.

[0078] In several embodiments provided in this application, it should be understood that the disclosed systems, devices, and methods can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of the units is only a logical function division, and there may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the displayed or discussed couplings or direct couplings or communication connections to each other can be through some interfaces, and the indirect couplings or communication connections of the devices or units can be in electrical, mechanical, or other forms.

[0079] The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they can be located in one place, or distributed to multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0080] In addition, the functional units in each embodiment of this application can be integrated into one processing unit, or each unit can exist physically alone, or two or more units can be integrated into one unit.

[0081] When the above-mentioned functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or a part of this technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in various embodiments of this application. The aforementioned storage medium includes: various media such as USB flash drives, mobile hard disks, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical discs that can store program codes.

[0082] As described above, the above is only the specific implementation manner of this application, but the protection scope of this application is not limited thereto. Any person skilled in the art within the technical scope disclosed by this application can easily think of changes or substitutions, which should all be covered by the protection scope of this application. Therefore, the protection scope of this application should be subject to the protection scope of the claims.

Claims

1. A cable stress monitoring device, characterized in that: is configured as: Obtain cable installation design data for state model analysis and obtain cable model stress data; Acquire real-time stress data at the stress monitoring position, and perform static stress monitoring analysis in combination with the cable model stress data to form static stress monitoring result data; Performing dynamic stress monitoring and analysis based on the real-time stress data and in combination with the cable model stress data to form dynamic stress monitoring result data; The static stress monitoring result data and the dynamic stress monitoring result data are integrated to form the cable stress monitoring result data; Among them, obtaining cable installation design data for state model analysis and obtaining cable model stress data include: Extracting material performance parameters in the cable installation design to determine the allowable tensile stress and allowable compressive stress of the cable; Establishing a cable installation model according to the cable installation design data, and performing a cable limit state analysis to obtain cable limit state stress data; The allowable tensile stress, the allowable compressive stress and the limit state stress data of the cable are collected to form the cable model stress data; A cable installation model is established according to the cable installation design data, and a cable limit state analysis is performed to obtain cable limit state stress data, including: Extracting prestress data for stress monitoring according to the cable installation model to form prestress data at the model monitoring position; According to the cable installation model, a stress dynamic analysis based on environmental effects is performed to form model dynamic stress limit data; The prestress data of the model monitoring position and the dynamic stress limit data of the model are collected to form the ultimate state stress data of the cable.

2. The cable stress monitoring device according to claim 1, characterized in that: The extracting of prestress data for stress monitoring according to the cable installation model to form prestress data at the model monitoring position includes: Calibrate the stress monitoring position according to the cable installation model, and extract the model prestress of the calibrated stress monitoring position to form the model position prestress corresponding to different stress monitoring positions; The different stress monitoring positions and the corresponding model position prestress are collected to form model monitoring position prestress data.

3. The cable stress monitoring device according to claim 2, characterized in that: The method of performing a stress dynamic analysis based on environmental effects according to the cable installation model to form model dynamic stress limit data includes: Obtain all single environmental loading conditions of the cables corresponding to different environmental effects, and extract the single environmental comprehensive force change function corresponding to the single environmental loading conditions of the cables , n represents the number of different environmental effects, and m represents the number of the single environmental loading conditions of the different cables under the environmental effect numbered n; The comprehensive stress change function of a single environment under different environmental effects , conduct alternating effect analysis based on load amplitude fluctuation, determine the effective alternating working conditions under environmental effects, and obtain the restricted alternating data corresponding to environmental effects; According to the restricted alternating data corresponding to different environmental effects, a cumulative effect analysis based on fatigue damage effect is performed on the cable installation model to obtain out-of-range fatigue damage cumulative data.

4. The cable stress monitoring device according to claim 3, characterized in that: The comprehensive stress change function of different single environments under different environmental effects , conduct alternating effect analysis based on load amplitude fluctuations, determine the effective alternating working conditions under environmental effects, and obtain the restricted alternating data corresponding to environmental effects, including: The comprehensive stress change function of a single environment under different environmental effects The corresponding single environmental loading condition is determined as the effective alternating condition in the following manner: Set the peak allowable deviation, and the comprehensive force change function of the single environment If there are any number of cluster groups so that the difference between any two peaks in the cluster group does not exceed the peak allowable deviation, and the peaks in different cluster groups form a single number of permutations and combinations with a fixed order and a fixed duration, and different permutations and combinations are periodically distributed in the time dimension, then the single environmental comprehensive force change function The corresponding environmental load condition is calibrated as an effective alternating condition; The single environmental comprehensive force change function determined as the effective alternating working condition , determining the average value of the cycles corresponding to all permutations and combinations of fixed sequences and fixed durations as the effective alternating cycle of the effective alternating working condition, and determining the average value of the alternating cycle cumulative stress of the cable at the stress monitoring position in all permutations and combinations of fixed sequences and fixed durations as the effective alternating stress of the effective alternating working condition; For the environmental effect with the effective alternating working condition, according to all the effective alternating working conditions, the minimum effective alternating period is determined as the limiting effective alternating period corresponding to the environmental effect, and the maximum effective alternating stress is determined as the limiting effective alternating stress corresponding to the environmental effect; The limited effective alternating period and the limited effective alternating stress are combined to form the limited alternating data corresponding to the environmental effect.

5. The cable stress monitoring device according to claim 4, characterized in that: According to the restricted alternating data corresponding to different environmental effects, the cable installation model is subjected to cumulative effect analysis based on fatigue damage effect to obtain over-range fatigue damage cumulative data, including: For different environmental effects, the limited effective alternating cycle is used as a fixed fatigue analysis cycle for fatigue damage, and the limited effective alternating stress is used as the starting cycle stress. A fatigue damage analysis of the cable installation model with the starting cycle stress continuously changing in one direction is performed. When the starting cycle stress is adjusted to the point where fatigue damage beyond the allowable range just occurs in the cable installation model, the cycle stress corresponding to different position points of the stress monitoring position is determined as the out-of-range fatigue cycle stress limit of the position point, and the total accumulated stress at different position points of the stress monitoring position over the entire duration is obtained to form the total accumulated stress of the model environment at the position point. The out-of-range fatigue cycle stress limit value and the total cumulative amount of the model environment corresponding to the monitoring position under different environmental effects are collected to form the out-of-range fatigue damage cumulative data corresponding to the environmental effect.

6. The cable stress monitoring device according to claim 5, characterized in that: The real-time stress data of the stress monitoring position is obtained, and static stress monitoring analysis is performed in combination with the stress data of the cable model to form static stress monitoring result data, including: According to the real-time stress data, position-stress relationship information of stress value changing with position at the stress monitoring position is obtained; Extracting the real-time maximum tensile stress, the real-time minimum tensile stress, the real-time maximum compressive stress and the real-time minimum compressive stress from the position stress relationship information; According to the real-time maximum tensile stress, the real-time maximum compressive stress, the real-time minimum tensile stress and the real-time minimum compressive stress, and in combination with the allowable tensile stress, the allowable compressive stress and the prestress data at the model monitoring position, the following analysis and judgment are performed: If the real-time maximum compressive stress does not exceed the allowable tensile stress, the real-time maximum compressive stress does not exceed the allowable compressive stress, and for the position corresponding to the real-time minimum tensile stress, the corresponding prestress extracted from the prestress data at the model monitoring position is not greater than the real-time minimum tensile stress, and for the position corresponding to the real-time minimum compressive stress, the corresponding prestress extracted from the prestress data at the model monitoring position is not greater than the real-time minimum compressive stress, then normal information of the real-time static stress value is generated, otherwise abnormal information of the real-time static stress value is generated; Set the stress change gradient limit value, extract the real-time stress change gradient between adjacent positions according to the position stress relationship information, and perform the following analysis and judgment: If all the real-time stress change gradients do not exceed the stress change gradient limit value, then real-time static stress gradient normal information is generated; If the real-time stress change gradient exceeds the stress change gradient limit value, real-time static stress gradient abnormality information is generated.

7. The cable stress monitoring device according to claim 6, characterized in that: The dynamic stress monitoring analysis is performed based on the real-time stress data and combined with the cable model stress data to form dynamic stress monitoring result data, including: According to the real-time stress data, obtaining stress change information of the stress monitoring position during the entire real-time monitoring period; Extract stress change information at any position point and form a real-time stress change function of the position point; The real-time stress change function of the position point is analyzed for alternating effects based on amplitude fluctuations: If the real-time stress change function of the position point is a non-alternating function, normal information of real-time dynamic stress is formed; If the real-time stress variation function of the position point is an alternating function, fatigue stress analysis based on the out-of-range fatigue damage accumulation data is performed to form a real-time dynamic fatigue stress monitoring result.

8. The cable stress monitoring device according to claim 7, characterized in that: If the real-time stress change function of the position point is an alternating function, a fatigue stress analysis based on the over-range fatigue damage accumulation data is performed to form a real-time dynamic fatigue stress monitoring result, including: The real-time periodic stress and the real-time total stress accumulation corresponding to the real-time stress change function of the position point are obtained, and the out-of-range fatigue periodic stress limit and the out-of-range fatigue damage stress accumulation of the corresponding position point in the out-of-range fatigue damage accumulation data are combined to perform the following analysis and judgment: If the real-time cycle stress is not less than the out-of-range fatigue cycle stress limit, and the real-time total stress accumulation is not less than the out-of-range fatigue damage stress total accumulation, real-time fatigue damage over-limit information is generated, otherwise real-time fatigue damage non-over-limit information is generated.

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