CN-121997590-A - Digital twinning-based cable swing test evaluation method and system

CN121997590ACN 121997590 ACN121997590 ACN 121997590ACN-121997590-A

Abstract

The application provides a cable swing test evaluation method and system based on digital twinning, and belongs to the field of power cable testing. The method comprises the steps of establishing a cable digital twin model facing a target cable, verifying and optimizing the cable digital twin model based on historical swing test data, carrying out twin simulation based on the optimized cable digital twin model by combining predefined real working condition requirements and a swing test scheme to be evaluated to generate a corresponding reference damage response mode set and a corresponding contrast damage response mode set, comparing and analyzing the reference damage response mode set and the contrast damage response mode set, and evaluating simulation effectiveness of the swing test scheme on the real working condition according to comparison and analysis results. The application solves the technical problem that the cable swing test scheme in the prior art cannot accurately evaluate the simulation effectiveness of the cable swing test scheme on the real working condition, and achieves the technical effect of accurately evaluating the simulation effectiveness of the cable swing test scheme through digital twin simulation comparison analysis.

Inventors

LIN YINGTING
ZHANG TAIQI

Assignees

东莞富迪电子有限公司

Dates

Publication Date: 20260508
Application Date: 20260123

Claims (10)

1. The cable sway test evaluation method based on digital twinning is characterized by comprising the following steps of: establishing a cable digital twin model oriented to a target cable, and verifying and optimizing the cable digital twin model based on historical swing test data; based on the optimized cable digital twin model, carrying out twin simulation by combining with predefined real working condition requirements and a swing test scheme to be evaluated, and generating a corresponding reference damage response mode set and a corresponding contrast damage response mode set; and comparing and analyzing the reference injury response mode set and the comparison injury response mode set, and evaluating the simulation effectiveness of the swing test scheme on the real working condition according to the comparison and analysis result.
2. The digital twinning-based cable sway test evaluation method of claim 1, wherein establishing a cable digital twinning model for a target cable and performing verification optimization on the cable digital twinning model based on historical sway test data, previously comprises: Acquiring the historical swing test data; Calculating and determining the time proximity according to the interval between the generation time and the current time of the historical swing test data; calculating and determining scheme difference degree according to the difference between the historical test scheme corresponding to the historical swing test data and the swing test scheme; Calculating the selection priority of each historical swing test data according to the time adjacency and the scheme difference, wherein the selection priority is inversely related to the time adjacency and positively related to the scheme difference; The historical swing test data items are arranged in a descending order based on the selection priority, and the arranged sequence is divided into a priori data set and a check data set according to a preset proportion threshold; the prior data set is used for optimizing parameters of the cable digital twin model subsequently, and the verification data set is used for verifying the optimized cable digital twin model subsequently.
3. The digital twinning-based cable sway test evaluation method of claim 1, wherein establishing a cable digital twinning model for a target cable and performing verification optimization of the cable digital twinning model based on historical sway test data comprises: constructing a parameterized digital twin-cable model of a target cable, wherein key physical properties and boundary conditions of the digital twin-cable model are defined as adjustable model parameters; Extracting priori input conditions and priori output response data according to the historical swing test data, and applying the priori input conditions to the cable digital twin model to perform twin simulation to obtain priori simulation response data; Performing iterative optimization on the model parameters with the aim of minimizing the difference between the prior simulation response data and the prior output response data; And extracting verification input conditions and verification output response data according to the historical swing test data, verifying the cable digital twin model, and outputting according to a verification result.
4. The digital twinning-based cable sway test evaluation method of claim 1, wherein based on the optimized cable digital twinning model, twinning simulation is performed in combination with predefined real working condition requirements and a sway test scheme to be evaluated, and a corresponding reference damage response mode set and a corresponding contrast damage response mode set are generated, comprising: defining a minimum working condition cycle of the target cable according to the real working condition requirement; Extracting a minimum test cycle of a target cable based on the swing test scheme, wherein the cycle time length ratio of the minimum working condition cycle to the minimum test cycle is not more than n and not less than the reciprocal of n, and n is more than 1; Circularly inputting the minimum working condition to the cable digital twin model to carry out twin simulation, and extracting a reference response mode set according to a twin simulation result; inputting the minimum test cycle to the cable digital twin model for twin simulation, and extracting a comparison response mode set according to a twin simulation result; the reference injury response mode set and the contrast injury response mode set at least comprise an injury accumulation mode and a loss distribution mode.
5. The method for evaluating a cable sway test based on digital twinning of claim 4, wherein comparing the reference injury response pattern set with the comparative injury response pattern set and evaluating the simulated effectiveness of the sway test scheme for real conditions based on the comparison, comprises: Analyzing and calculating the dynamic time regular distance between the reference damage response mode set and the comparison damage response mode set in the damage accumulation type mode dimension to obtain a time sequence shape difference measurement; Analyzing and calculating the image similarity and the statistical feature distance between the reference damage response mode set and the contrast damage response mode set in the loss distribution mode dimension, and outputting the weighted image similarity and the statistical feature distance as a spatial distribution difference measure; and obtaining the simulation effectiveness by weighting calculation for the comparison analysis result by using the time sequence shape difference measurement and the space distribution difference measurement.
6. The digital twinning-based cable sway test evaluation method according to claim 1, wherein based on the optimized cable digital twinning model, twinning simulation is performed by combining a predefined real working condition requirement and a sway test scheme to be evaluated, and a corresponding reference damage response mode set and a corresponding contrast damage response mode set are generated, before the steps of: acquiring the real working condition demands, and analyzing and acquiring a corresponding typical working condition load module set; Taking the real working condition requirement as scheme constraint, and carrying out random combination of the typical working condition load modules according to the typical working condition load module set to obtain a plurality of differentiated working condition load schemes; Extracting load module combination information of a plurality of working condition load schemes, and calculating information entropy of the working condition load schemes according to the load module combination information; And if the information entropy meets a preset entropy threshold, outputting a plurality of working condition load schemes as a differential working condition test scheme set.
7. The digital twinning-based cable sway test evaluation method of claim 6, wherein based on the optimized cable digital twinning model, twinning simulation is performed in combination with predefined real working condition requirements and a sway test scheme to be evaluated, generating a corresponding reference damage response mode set and a corresponding contrast damage response mode set, further comprising: traversing the differential chemical engineering test scheme set to carry out twin simulation analysis according to the cable digital twin model; According to twin simulation analysis results corresponding to the working condition load schemes, calculating and obtaining the reference damage response mode set, wherein the reference damage response mode set comprises a plurality of reference damage response mode subsets; and carrying out twin simulation according to the cable digital twin model and the swinging test scheme to obtain the comparison damage response mode set.
8. The digital twinning-based cable sway test evaluation method of claim 7, wherein comparing the reference set of impairment response patterns to the comparative set of impairment response patterns comprises: extracting a plurality of groups of reference damage accumulation type modes and reference loss distribution type modes corresponding to the working condition load schemes according to the reference damage response mode set; Extracting a comparison damage accumulation type mode and a comparison loss distribution type mode from the comparison damage response mode set; Traversing a plurality of groups of reference damage accumulation class modes and reference loss distribution class modes, respectively calculating binary difference metrics between the reference damage accumulation class modes and the reference loss distribution class modes, wherein the binary difference metrics comprise: calculating a dynamic time warping distance between the reference damage accumulation class mode and the comparison damage accumulation class mode as a time sequence shape difference measurement; Calculating the image similarity and the statistical feature distance between the reference loss distribution mode and the contrast loss distribution mode, and outputting the weighted image similarity and the statistical feature distance as a spatial distribution difference measure; And calculating a difference measurement mean value and a difference measurement variance based on a plurality of groups of the binary difference measurement, and outputting the difference measurement mean value and the difference measurement variance as the comparison analysis result.
9. The digital twinning-based cable sway test evaluation method of claim 1, wherein the comparison analysis of the reference injury response pattern set and the comparison injury response pattern set is performed, and the simulation effectiveness of the sway test scheme to real conditions is evaluated based on the comparison analysis results, and further comprising: Iterative analysis is carried out to obtain simulation effectiveness of a plurality of swing test schemes; Calculating a simulation cost factor of each swing test scheme by combining a preset cost evaluation function, wherein the simulation cost factor comprises a time cost item and a resource cost item; and calculating and obtaining scheme recommendation degrees of a plurality of swing test schemes according to the simulation effectiveness and the simulation cost factor by combining a dimensionless weighting method, and feeding back the scheme recommendation degrees.
10. Digital twinning based cable sway test evaluation system for implementing a digital twinning based cable sway test evaluation method according to any one of claims 1 to 9, comprising: the twin modeling verification module is used for establishing a cable digital twin model facing the target cable and verifying and optimizing the cable digital twin model based on historical swing test data; the simulation damage analysis module is used for carrying out twin simulation by combining a predefined real working condition requirement and a swing test scheme to be evaluated based on the optimized cable digital twin model, and generating a corresponding reference damage response mode set and a corresponding contrast damage response mode set; the scheme validity evaluation module is used for comparing and analyzing the reference damage response mode set and the comparison damage response mode set, and evaluating the simulation validity of the swing test scheme on the real working condition according to the comparison and analysis result.

Description

Digital twinning-based cable swing test evaluation method and system Technical Field The invention relates to the field of power cable testing, in particular to a cable swing test evaluation method and system based on digital twinning. Background The cable can bear swinging stress caused by external factors such as wind power, water flow, mechanical vibration and the like in the applications of ocean engineering, wind power generation, overhead power transmission and the like, and the cable can be damaged by fatigue caused by long-term swinging movement. In order to evaluate the reliability of the cable under the swinging working condition, the prior art adopts a laboratory swinging test method, and a simulation swinging test is carried out on the cable through a specific test device and parameters. However, the laboratory test environment is different from the real working condition environment, the test parameter setting is based on experience or a simplified theoretical model, and the stress state and the damage evolution process of the cable under the real working condition are difficult to accurately reflect. In the prior art, an effective method is lacked to evaluate the simulation accuracy of the swinging test scheme on the real working condition, so that whether the test scheme can reflect swinging response characteristics in the actual application environment of the cable cannot be judged quantitatively, and the reliability of the test result is insufficient. Disclosure of Invention Aiming at the technical problem that the cable sway test scheme in the prior art cannot accurately evaluate the simulation effectiveness of the cable sway test scheme on the real working condition, the invention provides a cable sway test evaluation method and system based on digital twinning, which are used for solving the problem. The technical scheme for solving the technical problems is as follows: The invention provides a cable swing test evaluation method based on digital twinning, which comprises the steps of establishing a cable digital twinning model facing a target cable, verifying and optimizing the cable digital twinning model based on historical swing test data, carrying out twinning simulation based on the cable digital twinning model after optimization by combining predefined real working condition requirements and a swing test scheme to be evaluated to generate a corresponding reference damage response mode set and a comparison damage response mode set, comparing and analyzing the reference damage response mode set and the comparison damage response mode set, and evaluating simulation effectiveness of the swing test scheme on the real working condition according to comparison and analysis results. The invention provides a cable swing test evaluation system based on digital twinning, which comprises a twinning modeling verification module, a simulation damage analysis module and a scheme validity evaluation module, wherein the twinning modeling verification module is used for establishing a cable digital twinning model oriented to a target cable and verifying and optimizing the cable digital twinning model based on historical swing test data, the simulation damage analysis module is used for carrying out twinning simulation based on the optimized cable digital twinning model and combining predefined real working condition requirements and a swing test scheme to be evaluated to generate a corresponding reference damage response mode set and a comparison damage response mode set, and the scheme validity evaluation module is used for comparing and analyzing the reference damage response mode set and the comparison damage response mode set and evaluating simulation validity of the swing test scheme to the real working condition according to comparison and analysis results. The beneficial effects of the invention are as follows: Establishing a cable digital twin model oriented to a target cable, verifying and optimizing the cable digital twin model based on historical swing test data, constructing a virtual model which is highly consistent with the real cable in terms of geometric structure, material property, boundary condition and the like through digital modeling, correcting model parameters by utilizing historical test data, ensuring that the digital twin model can accurately reflect the dynamic response characteristic of the real cable, and providing a reliable digital foundation for subsequent simulation analysis. Based on the optimized cable digital twin model, twin simulation is carried out by combining the predefined real working condition requirement and the swing test scheme to be evaluated, a corresponding reference damage response mode set and a corresponding contrast damage response mode set are generated, and complete characteristic data of cable damage evolution under two working conditions are obtained by respectively simulating the real working condition environment and the test scheme enviro