微地貌下输变线路振动响应特性研究

Study on Vibration Response Characteristics of Microtransmission Line

架空输电导线在复杂微地形条件下风振响应的研究方面,常采用将流场与固体分开的单向耦合方式进行计算,文章针对研究不足,基于双向流固耦合理论,构建微地貌下输变线路风环境下振动强双向耦合计算方法,并研究风速骤降时输变线路振动特性。研究发现,风速骤降时线路出现周期性摆动衰减,且摆动幅度与下降梯度有关,但周期基本不变。

Overhead transmission wire under the condition of complex micro terrain wind vibration response research,often using the flow field and solid separate unidirectional coupling calculation,in this paper for this deficiency,based on the theory of bidirectional solid coupling theory,build micro landform under the transmission line wind environment vibration strong bidirectional coupling calculation method,and study the wind speed drop variable line vibration characteristics,found that the wind speed drop line periodic swing decay,and the swing amplitude related to drop gradient,but the period is basically unchanged.