基于多质点模型的输电塔线体系随机风振响应研究

Random Response Analysis of Transmission Tower-line System Under Winds Based on the Multi-particle Model

输电塔线体系在风致振动表现出强烈的非线性特征,因此不能直接采用现有的结构随机风振响应分析方法。基于此,开展了输电塔线体系的随机风振响应研究。采用Hamilton原理建立了输电塔线体系的势能和动能表达式,通过等价线性化方法建立了塔线体系随机风振反应的分析模型。以某实际大跨越输电塔线体系为实际工程背景开展了其随机风振响应分析。结果表明,从频域角度可以有效地分析评估输电塔线体系的风振响应特点和规律。

The dynamic responses of transmission tower-line system present the properties of strong non-linearity and the current analytical methods for the structural random responses cannot be directly applied.In this regard,the random response analysis of transmission tower-line system under winds based on the multi-particle model was actively conduc-ted.The expression of kinetic energy and potential energy of the transmission tower-line system was established using Hamilton principle and the mechanical model of the tower-line system for the wind-excited random responses were devel-oped based on the equivalent linearization method.A real large span tower-line system was selected as an example to in-vestigated the structural random responses under wind excitation.The made observations indicate that the response prop-erties of the wind-excited transmission tower-line system can be investigated in the frequency domain.