Inhaul cable stress monitoring device

Abstract

The invention provides an inhaul cable stress monitoring device, and relates to the technical field of inhaul cable monitoring. The device is configured to obtain inhaul cable installation design data for state model analysis and obtain inhaul cable model stress data; acquiring real-time stress data of the stress monitoring position, and performing static stress monitoring analysis in combination with the stress data of the inhaul cable model to form static stress monitoring result data; according to the real-time stress data, dynamic stress monitoring analysis is carried out in combination with the stress data of the inhaul cable model, and dynamic stress monitoring result data is formed; and integrating the static stress monitoring result data and the dynamic stress monitoring result data to form inhaul cable stress monitoring result data. According to the device, comparative analysis of stress model parameter data and real-time stress monitoring data is carried out based on design data and stress big data, and an accurate and comprehensive inhaul cable stress monitoring effect is achieved.

Description

Technical Field

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

[0002] Cables are widely used in engineering fields such as construction and machinery, and have important mechanical effects. In actual situations, the force environment of cables is relatively complex, and long-term use will cause functional failure, so they need to be reasonably monitored.

[0003] Since the failure of cables is mainly caused by force and environmental influences, it is necessary to monitor the stress of cables. Stress can reflect the influence of force on cables as well as the influence of temperature, humidity, etc. However, the current monitoring of cable stress is mainly based on simple static analysis and judgment, which is not comprehensive.

[0004] Therefore, it is an urgent problem to be solved to design a cable stress monitoring device to achieve a more accurate and comprehensive cable stress monitoring effect by comparing and analyzing the stress model parameter data with the real-time stress monitoring data based on the design data and force big data. Summary of the invention

[0005] The purpose of the present invention is to provide a cable stress monitoring device, which establishes a force model for cable installation by acquiring the installation design data of the cable, and then obtains the model's prestress data and stress limit information within the controllable stress range based on material properties based on the model, and the stress limit information includes static range limit information and dynamic stress limit information analyzed based on big data of different environmental conditions. In the process of real-time monitoring of the cable stress, the real-time stress condition of the cable is analyzed from both statics and dynamics using the limit information provided by the model, to ensure that the stress does not exceed the limit in the static state and that fatigue damage beyond the allowable range will not occur due to stress accumulation caused by long-term force action.

[0006] In a first aspect, the present invention provides a cable stress monitoring device, which is configured to: obtain cable installation design data for state model analysis, and obtain cable model stress data; obtain real-time stress data at the stress monitoring position, and perform static stress monitoring and analysis in combination with the cable model stress data to form static stress monitoring result data; perform 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; and integrate the static stress monitoring result data and the dynamic stress monitoring result data to form the cable stress monitoring result data.

[0007] In the present invention, the device establishes a stress model for cable installation by acquiring the installation design data of the cable, and then acquires the prestress data of the model and the stress limit information within the controllable stress range based on the material properties based on the model, and the stress limit information includes the limitation information of the static range and the stress limit information of the dynamics analyzed based on the big data of different environmental conditions. In the process of real-time monitoring of the stress of the cable, the real-time stress condition of the cable is analyzed from the two aspects of statics and dynamics using the limitation information provided by the model, to ensure that the stress does not exceed the limit in the static state and that fatigue damage beyond the allowable range will not occur due to stress accumulation caused by long-term force.

[0008] As a possible implementation method, the cable installation design data is obtained to perform state model analysis and obtain cable model stress data, including: 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 the cable limit state stress data; and combining the allowable tensile stress, allowable compressive stress and cable limit state stress data of the cable to form the cable model stress data.

[0009] In the present invention, the model established by the installation design data of the cable is used to obtain the cable stress limit information, and two aspects of stress limit are mainly considered. On the one hand, whether the stress exhibited by the cable in a static state exceeds the allowable stress value of the material specified by the design, and on the other hand, the cable must be stably connected and must be in a tightened state after installation, with a certain prestress, so it has a minimum prestress limit. If it is lower than the prestress limit, the cable will lose its own function. At the same time, the cable also has a stress limit determined by the design. If it exceeds the limit, the cable will break and lose its function. Only after obtaining the two aspects of limit information can the monitoring effect of the cable stress be accurately achieved in real-time stress monitoring.

[0010] As a possible implementation method, a cable installation model is established according to the cable installation design data, and a cable limit state analysis is performed to obtain the 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; performing stress dynamic analysis based on environmental effects according to the cable installation model to form model dynamic stress limit data; and combining the model monitoring position prestress data and the model dynamic stress limit data to form the cable limit state stress data.

[0011] In the present invention, the acquisition of the allowable stress of the cable is mainly to determine the maximum allowable stress in combination with the cable structure and the mechanical properties of 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 material tensile stress and compressive stress are different, so there are also differences in the allowable values ​​for tensile stress and compressive stress, and they must be accurately determined separately. The acquisition of the ultimate stress data of the cable includes the limit data of prestress and stress dynamic analysis. 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 stress are different in different force environments.

[0012] As a possible implementation method, prestress data extraction for stress monitoring is performed according to the cable installation model to form prestress data of the model monitoring position, including: calibrating the stress monitoring position according to the cable installation model, and extracting model prestress from the calibrated stress monitoring position to form model position prestress corresponding to different stress monitoring positions; and combining different stress monitoring positions and corresponding model position prestresses to form model monitoring position prestress data.

[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 is not fully covered in practice, but the stress monitoring is performed at key or main positions, the prestress of the cable determined based on the model is convenient for subsequent real-time monitoring, analysis and comparison, and the stress data at the real-time monitoring position point can be obtained as the target data, which can also reduce the amount of data storage and save resources.

[0014] As a possible implementation method, according to the cable installation model, a stress dynamic analysis based on environmental effects is performed to form the model dynamic stress limit data, including: obtaining all cable single environmental loading conditions corresponding to different environmental effects, and extracting the single environmental comprehensive force change function corresponding to different cable single environmental loading conditions , n represents the number of different environmental effects, m represents the number of different single environmental loading conditions of the cable under the environmental effect numbered n; the comprehensive force change function of different single environments under different environmental effects , carry out 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 the environmental effects; according to the restricted alternating data corresponding to different environmental effects, carry out cumulative effect analysis based on fatigue damage effect on the cable installation model, and obtain the cumulative data of over-range fatigue damage.

[0015] In the present invention, the stress dynamic analysis based on the environmental effect of the cable installation model is mainly to use the historical stress change data corresponding to different environmental stress conditions to perform dynamic stress analysis, mainly considering whether the cable will have alternating stress under the corresponding stress condition, resulting in stress accumulation and fatigue damage beyond the allowable range. In order to cause fatigue damage beyond 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 beyond 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 force mode is the same, the magnitude of the force will change, so there are different specific environmental loading conditions corresponding to the environmental effect. After obtaining these environmental condition data, the corresponding force change data is formed, which is then used as the basic data for extracting the fatigue cumulative effect with alternating stress under the corresponding environmental effect.

[0016] As a possible implementation method, the comprehensive stress change function of different single environments under different environmental effects is , 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, including: different single environmental comprehensive force change functions under different environmental effects The corresponding single environmental loading condition is determined as the effective alternating condition by setting the peak allowable deviation and calculating the single environmental comprehensive force change function. , 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 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 loading condition is calibrated as the effective alternating condition; the single environmental comprehensive force change function determined as the effective alternating condition , determine the average value of the cycles corresponding to all permutations and combinations of fixed order and fixed duration as the effective alternating cycle of the effective alternating condition, and determine the average value of the alternating cycle cumulative stress of the cable at the stress monitoring position in all permutations and combinations of fixed order and fixed duration as the effective alternating stress of the effective alternating condition; for environmental effects with effective alternating conditions, determine the limiting effective alternating cycle corresponding to the environmental effect based on all effective alternating conditions with the minimum effective alternating cycle, and determine the maximum effective alternating stress as the limiting effective alternating stress corresponding to the environmental effect; collect the limiting effective alternating cycles and limiting effective alternating stresses to form the limiting 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 method, according to the limited alternating data corresponding to different environmental effects, the cable installation model is subjected to a cumulative effect analysis based on the fatigue damage effect to obtain the out-of-range fatigue damage accumulation data, including: for different environmental effects, the fixed fatigue analysis period of fatigue damage is limited to the effective alternating period, and the starting cycle stress is limited to the effective alternating stress, and the fatigue damage analysis of the cable installation model with a single-direction continuous change of the starting cycle stress 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 stress accumulation at different position points of the stress monitoring position over the entire duration is obtained to form the model environment total accumulation of the position point; the out-of-range fatigue cycle stress limit and the model environment total accumulation corresponding to the monitoring position under different environmental effects are combined to form the out-of-range fatigue damage accumulation data corresponding to the environmental effect.

[0019] In the present invention, after obtaining the alternating force information based on big data according to different environmental effects, the alternating force information is used as the initial input of the model for fatigue damage analysis, and the input conditions are continuously changed 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 more likely fatigue damage will occur. 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 is necessary to adjust in two directions, larger or smaller. After all, the amount of stress accumulation per unit time reaches a certain volume before fatigue damage will occur. Before it is reached, even if the alternating cycle is short, it cannot be effectively accumulated. In this way, the cycle and alternating stress accumulation boundary value of the cable that exceed the allowable fatigue damage range are determined as the limit boundary of stress under dynamic analysis. Of course, after determining the limit boundary, considering that the cable is an object with size and volume, the cumulative effect will be different at different positions. Therefore, in order to facilitate real-time monitoring and analysis, the stress data at the corresponding monitoring position under the limit boundary are extracted to form the target data required for monitoring.

[0020] As a possible implementation method, 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: obtaining position stress relationship information of stress value changing with 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; performing the following analysis and judgment based on 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 the prestress data of the model monitoring position: if the real-time maximum compressive stress does not exceed the allowable tensile stress, and 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 the real-time static stress value normal information is formed, otherwise the real-time static stress value abnormal information is formed; 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 real-time stress change gradients do not exceed the stress change gradient limit value, then the real-time static stress gradient normal information is formed; if there is a real-time stress change gradient that exceeds the stress change gradient limit value, then the real-time static stress gradient abnormal information is formed.

[0021] In the present invention, the real-time monitoring process mainly extracts the data of stress value changes over time at the monitoring position. When analyzing and judging static stress, the main thing is to obtain the limit value in the variable data 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, so the stress change gradient of adjacent position points in the continuous area is also within a reasonable range, and then the gradient situation needs to be confirmed to avoid the local stress damage caused by excessive stress changes. Of course, the gradient can also be confirmed for two discontinuous position points through position information. The stress change gradient limit value can be set according to the actual situation, and can also be determined based on big data analysis.

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

[0023] In the present invention, during real-time monitoring, the monitoring and analysis of dynamic stress is mainly to 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 accumulated data of over-range fatigue damage. Here, it is considered that there may be differences in stress change data at different positions, because the analysis is based on the stress change data of the position point as the basis for judging the alternating characteristics. Of course, the alternating characteristics of a single position point also represent that the stress of the entire cable has an alternating characteristic. It is also possible to specify a certain number of position points for verification to ensure the accuracy of the analysis. The judgment of the alternating characteristics is the same as the dynamic stress analysis of the model. It is mainly considered that the data with obvious periodic characteristics such as the difference in peak values ​​and the stability of the cycle are all within a reasonable range before it is determined to have an alternating characteristic.

[0024] As a possible implementation method, if the real-time stress change 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, including: obtaining the real-time cycle stress and the real-time stress total accumulation corresponding to the real-time stress change function of the position point, and combining the out-of-range fatigue cycle stress limit and the out-of-range fatigue damage stress total accumulation of the corresponding position point in the out-of-range fatigue damage accumulation data, and performing 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 stress total accumulation is not less than the out-of-range fatigue damage stress total accumulation, then 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 real-time stress change data with alternating characteristics is compared and analyzed with the accumulated data of over-range fatigue damage, and the periodic stress value and the accumulated total amount at the corresponding position point are compared. Only when both do not reach the limit value can it be determined that the dynamic stress monitoring does not have a stress abnormality result. Here, multiple position points can also be selected for verification to ensure the accuracy of the analysis results.

[0026] The beneficial effects of a cable stress monitoring device provided by the present invention are: The device establishes a stress model for cable installation by acquiring the installation design data of the cable, and then acquires the model's prestress data and stress limit information within the controllable stress range based on material properties based on the model. The stress limit information includes static range limit information and dynamic stress limit information analyzed based on big data of different environmental conditions. In the process of real-time monitoring of the cable stress, the real-time stress condition of the cable is analyzed from both static and dynamic aspects using the limit information provided by the model to ensure that the stress does not exceed the limit in the static state and that fatigue damage beyond the allowable range will not occur due to stress accumulation caused by long-term force action. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] 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 are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0028] Figure 1 A diagram showing the working steps of the cable stress monitoring device provided by an embodiment of the present invention; Figure 2 A schematic structural diagram of a cable stress monitoring device provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present invention will be described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0030] Cables are widely used in engineering fields such as construction and machinery, and have important mechanical effects. In actual situations, the force environment of cables is relatively complex, and long-term use will cause functional failure, so they need to be reasonably monitored.

[0031] Since the failure of cables is mainly caused by force and environmental influences, it is necessary to monitor the stress of cables. Stress can reflect the influence of force on cables as well as the influence of temperature, humidity, etc. However, the current monitoring of cable stress is mainly based on simple static analysis and judgment, which is not comprehensive.

[0032] refer to Figure 1~Figure 2The embodiment of the present invention provides a cable stress monitoring device, which establishes a force model of cable installation by acquiring the installation design data of the cable, and then acquires the model's prestress data and stress limit information within the controllable stress range based on material properties based on the model, and the stress limit information includes static range limit information and dynamic stress limit information analyzed based on big data of different environmental conditions. In the process of real-time monitoring of the cable stress, the real-time stress condition of the cable is analyzed from both static and dynamic aspects using the limit information provided by the model, to ensure that the stress does not exceed the limit in the static state and that fatigue damage beyond the allowable range will not occur due to stress accumulation caused by long-term force action.

[0033] The cable stress monitoring device is specifically configured as follows: S1: Obtain cable installation design data for state model analysis and obtain cable model stress data.

[0034] The cable installation design data is obtained for state model analysis to obtain cable model stress data, including: 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 the cable limit state stress data; and combining the allowable tensile stress, allowable compressive stress and cable limit state stress data of the cable to form the cable model stress data.

[0035] The model established by using the installation design data of the cable to obtain the cable stress limit information mainly considers two aspects of stress limit. On the one hand, whether the stress exhibited by the cable in static state exceeds the allowable stress value of the material specified by the design, and on the other hand, the cable must be stably connected and must be in a tightened state after installation, with a certain prestress, so it has a minimum prestress limit. If it is lower than the prestress limit, the cable will lose its own function. At the same time, the cable also has a stress limit determined by the design. If it exceeds the limit, the cable will break and lose its function. Only after obtaining the two aspects of limit information can the monitoring effect of cable stress be accurately achieved in real-time stress monitoring.

[0036] A cable installation model is established according to the cable installation design data, and a cable limit state analysis is performed to obtain the 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; performing stress dynamic analysis based on environmental effects according to the cable installation model to form model dynamic stress limit data; and combining the model monitoring position prestress data and the model dynamic stress limit data to form the cable limit state stress data.

[0037] The acquisition of the allowable stress of the cable is mainly to determine the maximum allowable stress in combination with the cable structure and the mechanical properties of the material itself. The safety factor of the allowable stress can be determined according to actual needs. Of course, generally speaking, the limits of material tensile stress and compressive stress are different, so the allowable values ​​are also different in tensile stress and compressive stress, and they must be accurately determined separately. The acquisition of the ultimate stress data of the cable includes the limit data of prestress and stress dynamic analysis. 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 stress are different in different force environments.

[0038] According to the cable installation model, prestress data for stress monitoring is extracted to form prestress data of the model monitoring position, including: calibrating the stress monitoring position according to the cable installation model, and extracting model prestress from the calibrated stress monitoring position to form model position prestress corresponding to different stress monitoring positions; and combining different stress monitoring positions and corresponding model position prestress to form model monitoring position prestress data.

[0039] Prestress data information can be accurately obtained according to the static stress state of the model. Of course, in practice, the stress monitoring of the cable is not fully covered, but the key or main positions are selected for stress monitoring. Therefore, in order to facilitate the subsequent real-time monitoring, analysis and comparison based on the cable prestress determined by the model, the stress data at the real-time monitoring position point can be obtained as the target data, which can also reduce the amount of data storage and save resources.

[0040] According to the cable installation model, a stress dynamic analysis based on environmental effects is performed to form the model dynamic stress limit data, including: obtaining the corresponding single environmental loading conditions of all cables under different environmental effects, and extracting the single environmental comprehensive force change function corresponding to the single environmental loading conditions of different cables , n represents the number of different environmental effects, m represents the number of different single environmental loading conditions of the cable under the environmental effect numbered n; the comprehensive force change function of different single environments under different environmental effects , carry out 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 the environmental effects; according to the restricted alternating data corresponding to different environmental effects, carry out cumulative effect analysis based on fatigue damage effect on the cable installation model, and obtain the cumulative data of over-range fatigue damage.

[0041] The stress dynamic analysis based on environmental effects on the cable installation model mainly uses the historical stress change data corresponding to different environmental stress conditions to perform dynamic stress analysis, mainly considering whether the cable will have alternating stress under the corresponding stress conditions, resulting in stress accumulation and fatigue damage beyond the allowable range. In order to cause fatigue damage beyond the allowable range, two aspects need to be determined during the analysis. One is whether the stress changes generated in the corresponding stress environment form alternating stress, and the other is the cumulative effect information corresponding to fatigue damage beyond 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 force mode is the same, the magnitude of the force will change. Therefore, there are different specific environmental loading conditions corresponding to the environmental effect. After obtaining these environmental condition data, the corresponding force change data is formed, which is then used as the basic data for extracting the fatigue accumulation effect with alternating stress under the corresponding environmental effect.

[0042] Function of the comprehensive stress change of different single environments 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, including: different single environmental comprehensive force change functions under different environmental effects The corresponding single environmental loading condition is determined as the effective alternating condition by setting the peak allowable deviation and calculating the single environmental comprehensive force change function. , 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 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 loading condition is calibrated as the effective alternating condition; the single environmental comprehensive force change function determined as the effective alternating condition , determine the average value of the cycles corresponding to all permutations and combinations of fixed order and fixed duration as the effective alternating cycle of the effective alternating condition, and determine the average value of the alternating cycle cumulative stress of the cable at the stress monitoring position in all permutations and combinations of fixed order and fixed duration as the effective alternating stress of the effective alternating condition; for environmental effects with effective alternating conditions, determine the limiting effective alternating cycle corresponding to the environmental effect based on all effective alternating conditions with the minimum effective alternating cycle, and determine the maximum effective alternating stress as the limiting effective alternating stress corresponding to the environmental effect; collect the limiting effective alternating cycles and limiting effective alternating stresses to form the limiting alternating data corresponding to the environmental effect.

[0043] 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.

[0044] According to the limited alternating data corresponding to different environmental effects, the cable installation model is analyzed for the cumulative effect based on the fatigue damage effect to obtain the out-of-range fatigue damage accumulation data, including: for different environmental effects, the fixed fatigue analysis period of fatigue damage is limited to the effective alternating period, and the starting period stress is limited to the effective alternating stress, and the fatigue damage analysis of the cable installation model with continuous change in one direction of the starting period stress is performed; when the starting period stress is adjusted to the point where fatigue damage beyond the allowable range just occurs in the cable installation model, the period stress corresponding to different position points of the stress monitoring position is determined as the out-of-range fatigue period stress limit of the position point, and the total stress accumulation at different position points of the stress monitoring position over the entire duration is obtained to form the model environment total accumulation of the position point; the out-of-range fatigue period stress limit and the model environment total accumulation corresponding to the monitoring position under different environmental effects are combined to form the out-of-range fatigue damage accumulation data corresponding to the environmental effect.

[0045] After obtaining the alternating force information based on big data according to different environmental effects, the alternating force information is used as the initial input of the model for fatigue damage analysis, and the input conditions are continuously changed 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 more likely fatigue damage will occur. 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 is necessary to adjust in two directions, larger or smaller. After all, fatigue damage will only occur when the amount of stress accumulation per unit time reaches a certain volume. Before it is reached, it cannot be effectively accumulated even if the alternating cycle is short. In this way, the cycle and alternating stress accumulation boundary of the cable that exceeds the allowable fatigue damage range are determined as the limit boundary of stress under dynamic analysis. Of course, after determining the limit boundary, considering that the cable is an object with size and volume, the cumulative effect will be different at different positions. Therefore, in order to facilitate real-time monitoring and analysis, the stress data at the corresponding monitoring position under the limit boundary are extracted to form the target data required for monitoring.

[0046] S2: Obtain 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.

[0047] The real-time stress data of the stress monitoring position is obtained, and static stress monitoring and analysis is performed 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; performing the following analysis and judgment based on 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 the prestress data of the model monitoring position: 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 the real-time maximum For the position corresponding to the small 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 normal information of the real-time static stress value is formed, otherwise abnormal information of the real-time static stress value is formed; the stress change gradient limit value is set, and the real-time stress change gradient between adjacent positions is extracted according to the position stress relationship information, and the following analysis and judgment are performed: if all real-time stress change gradients do not exceed the stress change gradient limit value, normal information of the real-time static stress gradient is formed; if there is a real-time stress change gradient that exceeds the stress change gradient limit value, abnormal information of the real-time static stress gradient is formed.

[0048] The real-time monitoring process mainly extracts data on the stress value at the monitoring position changing with time. When analyzing and judging static stress, the main thing is to obtain the limit value in the variable data 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 area is also within a reasonable range. Therefore, it is necessary to confirm the gradient situation to avoid local stress damage caused by excessive stress changes. Of course, the gradient can also be confirmed for two discontinuous position points through position information. The stress change gradient limit value can be set according to the actual situation, or it can be determined based on big data analysis.

[0049] S3: Perform dynamic stress monitoring and analysis based on real-time stress data and combined with cable model stress data to generate dynamic stress monitoring result data.

[0050] According to the real-time stress data, dynamic stress monitoring and analysis is performed in combination with the stress data of the cable model to form dynamic stress monitoring result data, including: according to the real-time stress data, obtaining the stress change information of the stress monitoring position during the entire real-time monitoring time; 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, normal real-time dynamic stress information is formed; if the real-time stress change function of the position point is an alternating function, fatigue stress analysis based on the accumulated data of over-range fatigue damage is performed to form a real-time dynamic fatigue stress monitoring result.

[0051] During real-time monitoring, the monitoring and analysis of dynamic stress is mainly to 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 accumulated data of fatigue damage beyond the range. Here, it is considered that there may be differences in stress change data at different locations, because the analysis is based on the stress change data of the location point as the basis for judging the alternating characteristics. Of course, the alternating characteristics of a single location point also represent that the stress of the entire cable has an alternating characteristic. It is also possible to specify a certain number of location points for verification to ensure the accuracy of the analysis. The judgment of alternating characteristics is the same as the dynamic stress analysis of the model. It is mainly considered that the data with obvious periodic characteristics such as the difference in peak values ​​and the stability of the cycle are all within a reasonable range before it is determined to have alternating characteristics.

[0052] If the real-time stress change 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, including: obtaining the real-time periodic stress and the real-time total stress accumulation corresponding to the real-time stress change function of the position point, and combining the out-of-range fatigue periodic stress limit and the out-of-range fatigue damage total accumulation of the corresponding position point in the out-of-range fatigue damage accumulation data, and performing the following analysis and judgment: if the real-time periodic stress is not less than the out-of-range fatigue periodic stress limit, and the real-time total stress accumulation is not less than the out-of-range fatigue damage total accumulation, then real-time fatigue damage over-limit information is formed, otherwise real-time fatigue damage non-over-limit information is formed.

[0053] The real-time stress change data with alternating characteristics is compared and analyzed with the accumulated data of over-range fatigue damage. The periodic stress value and the accumulated total amount at the corresponding position point are compared. Only when both do not reach 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 results.

[0054] S4: Integrate the static stress monitoring result data and the dynamic stress monitoring result data to form the cable stress monitoring result data.

[0055] Only when both the static stress monitoring results and the dynamic stress monitoring results are normal can the cable be considered to be in normal working condition.

[0056] The present application also provides a specific composition of the device. It includes a data acquisition unit, which is used to collect the installation design data of the cable, the corresponding force change data under different working conditions under different environmental effects, and the real-time stress data; a feature extraction unit, which is used to obtain the cable model stress data according to the installation design data of the cable obtained by the data acquisition unit and the corresponding force change data under different working conditions under different environmental effects; a real-time monitoring and analysis unit, which is used to monitor and analyze the cable model stress data formed by the feature extraction unit based on the adaptive force data obtained by the data acquisition unit, and to form the stress monitoring result data.

[0057] The system provided by the present application also includes a specific stress collection method. To ensure that the monitored and collected data is comprehensive and representative, the collection position is mainly collected along the cable axis direction. Of course, multiple collection positions along the axis direction can also be set in the cable annular direction. The collection form can be a fiber grating sensor or a strain gauge.

[0058] In summary, the cable stress monitoring device provided by the embodiment of the present invention has the following beneficial effects: The device establishes a stress model for cable installation by acquiring the installation design data of the cable, and then acquires the model's prestress data and stress limit information within the controllable stress range based on material properties based on the model. The stress limit information includes static range limit information and dynamic stress limit information analyzed based on big data of different environmental conditions. In the process of real-time monitoring of the cable stress, the real-time stress condition of the cable is analyzed from both static and dynamic aspects using the limit information provided by the model to ensure that the stress does not exceed the limit in the static state and that fatigue damage beyond the allowable range will not occur due to stress accumulation caused by long-term force action.

[0059] In the embodiments of the present application, "indication" may include direct indication and indirect indication, and may also include explicit indication and implicit indication. The information indicated by a certain information is called information to be indicated. In the specific implementation process, there are many ways to indicate the information to be indicated, such as 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. The information to be indicated can also be indirectly indicated by indicating other information, wherein there is an association between the other information and the information to be indicated. It is also possible to indicate only a part of the information to be indicated, while the other parts of the information to be indicated are known or agreed in advance. For example, the indication of specific information can also be achieved by means of the arrangement order of each piece of information agreed in advance (for example, specified by the protocol), thereby reducing the indication overhead to a certain extent. At the same time, the common parts of each piece of information can also be identified and indicated uniformly to reduce the indication overhead caused by indicating the same information separately.

[0060] In addition, the specific indication method may also be various existing indication methods, such as but not limited to the above-mentioned indication methods and various combinations thereof. The specific details of the various indication methods can refer to the prior art and will not be repeated herein. As can be seen from the above, for example, when it is necessary to indicate multiple information of the same type, different indication methods may be used for different information. In the specific implementation process, the desired indication method can be selected according to specific needs. The embodiment of the present application does not limit the selected indication method. In this way, the indication method involved in the embodiment 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.

[0061] 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 period and / or sending time of these sub-information can be the same or different. The specific sending method is not limited in the embodiment of the present application. Among them, the sending period and / or sending time of these sub-information can be pre-defined, for example, pre-defined according to a protocol, or can be configured by the sending end device by sending configuration information to the receiving end device.

[0062] "Pre-definition" or "pre-configuration" can be implemented by pre-saving corresponding codes, tables or other methods that can be used to indicate relevant information in the device, and the embodiments of the present application do not limit the specific implementation method. Among them, "saving" can mean saving in one or more memories. The one or more memories can be set separately or integrated in an encoder or decoder, a processor, or a communication device. The one or more memories can also be partially set separately and partially integrated in a decoder, a processor, or a communication device. The type of memory can be any form of storage medium, which is not limited by the embodiments of the present application.

[0063] 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 similar protocol family frame structure, or a related protocol used in future communication systems, and the embodiments of the present application do not make specific limitations on this.

[0064] In the embodiments of the present application, descriptions such as "when...", "in the case of...", "if" and "if" all mean that the device will make corresponding processing under certain objective circumstances. It does not limit the time, nor does it require the device to have a judgment action when implementing it, nor does it mean that there are other limitations.

[0065] In the description of the embodiments of the present application, unless otherwise specified, " / " indicates that the objects associated before and after are in an "or" relationship. For example, A / B can represent A or B; "and / or" in the embodiments of the present application is only a description of the association relationship of the associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. These three situations, where A and B can be singular or plural. In addition, in the description of the embodiments of the present application, unless otherwise specified, "multiple" refers to two or more than two. "At least one of the following" or similar expressions refers 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, ab, ac, bc, or abc, where a, b, c can be single or multiple. In addition, in order to facilitate the clear description of the technical solution of the embodiments of the present application, in the embodiments of the present application, the words "first" and "second" are used to distinguish the same or similar items with basically the same functions and effects. Those skilled in the art will appreciate that words such as "first" and "second" do not limit the quantity and execution order, and words such as "first" and "second" do not necessarily limit the difference. At the same time, in the embodiments of the present application, words such as "exemplary" or "for example" are used to indicate examples, illustrations or explanations. Any embodiment or design described as "exemplary" or "for example" in the embodiments of the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary" or "for example" is intended to present related concepts in a concrete way for easy understanding.

[0066] 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 (DSP), application specific integrated circuits (ASIC), field programmable gate arrays (FPGA) 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.

[0067] 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 read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (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 and not limitation, many forms of random access memory (RAM) are available, such as static RAM (SRAM), dynamic random access memory (DRAM), synchronous DRAM (SDRAM), double data rate synchronous dynamic random access memory (DDR SDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous link DRAM (SLDRAM), and direct rambus RAM (DR RAM).

[0068] The above embodiments can be implemented in whole or in part by software, hardware (such as circuits), firmware or any other combination. 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 process or function described in the embodiment of the present application is generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium. 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.). 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 available media sets. The available medium can be a magnetic medium (for example, a floppy disk, a hard disk, a tape), an optical medium (for example, a DVD), or a semiconductor medium. The semiconductor medium can be a solid-state hard disk.

[0069] It should be understood that the term "and / or" in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. A and B can be singular or plural. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship, but it may also indicate an "and / or" relationship. Please refer to the context for specific understanding.

[0070] In this application, "at least one" means one or more, and "plurality" means two or more. "At least one of the following" or similar expressions refers 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 mean: a, b, c, ab, ac, bc, or abc, where a, b, and c can be single or multiple.

[0071] It should be understood that in the various embodiments of the present application, the size of the serial numbers of the above-mentioned processes does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0072] Those of ordinary skill in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0073] 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 aforementioned method embodiments and will not be repeated here.

[0074] In the several embodiments provided in the present 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 only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation, such as 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 mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0075] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0076] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0077] If the 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 the present application can be essentially or partly embodied in the form of a software product that contributes to the prior art. The computer software product is stored in a storage medium and includes several instructions for a computer device (which can be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in each embodiment of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM), random access memory (RAM), disk or optical disk, and other media that can store program codes.

[0078] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on 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.

2. The cable stress monitoring device according to claim 1, characterized in that: The step of obtaining the cable installation design data to perform state model analysis and obtain the cable model stress data includes: 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 cable limit state stress data of the cable are collected to form the cable model stress data.

3. The cable stress monitoring device according to claim 2, characterized in that: The step of establishing a cable installation model according to the cable installation design data, performing a cable limit state analysis, and obtaining cable limit state stress data includes: 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.

4. The cable stress monitoring device according to claim 3, 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.

5. The cable stress monitoring device according to claim 4, 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.

6. The cable stress monitoring device according to claim 5, 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 single environmental comprehensive force change function 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.

7. The cable stress monitoring device according to claim 6, 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.

8. The cable stress monitoring device according to claim 7, 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.

9. The cable stress monitoring device according to claim 8, 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.

10. The cable stress monitoring device according to claim 9, 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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