风-雨耦合场下的角钢输电塔-线体系分析方法及系统

By optimizing the wind-rain coupled load model and using three-dimensional finite element analysis, the accuracy of dynamic response analysis of angle steel transmission tower-line system under wind-rain coupled field in existing technologies has been solved, thus improving the safety of transmission towers under severe convective weather.

CN117494525BActive Publication Date: 2026-07-17ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID SHANDONG ELECTRIC POWER COMPANY

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID SHANDONG ELECTRIC POWER COMPANY
Filing Date
2023-11-23
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

Existing technologies struggle to accurately capture the dynamic response and disaster mechanisms of angle steel transmission tower-line systems under strong convective wind and rain conditions when analyzing wind-rain coupled fields, leading to inaccurate tower collapse accident analysis, especially for low-voltage angle steel towers.

Method used

By using wind speed and rainfall records based on measured data, wind load and rain load models were optimized. Combined with three-dimensional finite element analysis, a wind-rain coupled load calculation model was established to conduct dynamic response analysis.

Benefits of technology

Accurate analysis of the response and failure modes of the angle steel transmission tower-line system under strong wind-rain coupled loads was achieved, improving the safety of transmission towers under extreme weather conditions.

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Abstract

本发明公开了一种风‑雨耦合场下的角钢输电塔‑线体系分析方法及系统,包括:分别进行风载荷模拟和雨载荷模拟;建立风速和雨量的联合概率分布,基于建立的风速‑雨量联合概率分布,推求风雨组合作用的各自组合值和组合系数;采用基于一致危险性的灾害组合分析方法,在灾害联合概率密度函数取最大值的条件下,在其联合概率分布函数的设防概率水准等值线上取最可能发生的灾害作用组合值,进一步建立了强对流天气风‑雨耦合载荷计算模型;建立三塔四线三维有限元模型,将强对流天气风‑雨耦合载荷时程施加到三塔四线三维有限元模型上,进行动力响应分析,判断三塔四线三维有限元模型失效分析。
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