Power transmission line disaster resistance evaluation method and system considering coupling of local and overall damage

By constructing a phenomenological hysteresis constitutive model and a multi-level damage level mapping relationship, combined with user-defined material subroutines, a two-way dynamic coupling between component-level damage and system-level response of transmission tower structures is achieved. This solves the problem of low accuracy in disaster resistance assessment of transmission tower structures and realizes high-fidelity, full-process disaster simulation.

CN122433320APending Publication Date: 2026-07-21ECONOMIC TECH RES INST OF STATE GRID HENAN ELECTRIC POWER
View PDF 0 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
ECONOMIC TECH RES INST OF STATE GRID HENAN ELECTRIC POWER
Filing Date
2026-04-24
Publication Date
2026-07-21

AI Technical Summary

Technical Problem

Existing disaster assessment methods for transmission tower structures fail to accurately characterize the entire damage-instability process of steel components under cyclic loading, and cannot achieve dynamic coupling between local damage state and system-level response, resulting in distorted predictions of disaster paths and failure modes.

Method used

A phenomenological hysteresis constitutive model is constructed, multi-level damage levels are defined and parameterized mapping relationships are established, and user-defined material subroutines are developed. Through the collaborative operation of the finite element model and the material subroutines, bidirectional dynamic coupling between component-level damage state and system-level mechanical response is achieved.

Benefits of technology

It significantly improves the accuracy and reliability of disaster resistance assessment of transmission tower structures, and can realistically reproduce the redistribution of internal forces and the chain collapse process caused by component failure under extreme disasters, providing high-fidelity, full-process quantitative decision-making basis for disaster resistance design.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN122433320A_ABST
    Figure CN122433320A_ABST
Patent Text Reader

Abstract

The present application relates to the technical field of computer-aided design, in particular to a power transmission line disaster resistance evaluation method and system considering local-global damage coupling, the method comprising: constructing a hierarchical phenomenological hysteretic constitutive model; establishing an intelligent mapping function from damage grade and initial parameters to constitutive parameters; developing a user-defined material subroutine integrating the model and the mapping function, and implanting a double failure criterion; system-level multi-scale damage coupling simulation evaluation, which divides the power transmission tower sections, determines the weight, and inputs the initial damage distribution of the components in section units, in the dynamic time-history analysis, the program automatically calculates the section damage index and the system overall disaster resistance performance index according to the aggregation rules and algorithms, and realizes the whole process, dynamic two-way coupling simulation from component damage evolution to system performance degradation. The present application solves the problem of local-global damage evaluation fragmentation, significantly improves the simulation accuracy, engineering usability and system-level disaster process evaluation capability.
Need to check novelty before this filing date? Find Prior Art