强风下高压输电塔线系统非线性随机动力响应

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振动与冲击 ›› 2010, Vol. 29 ›› Issue (6) : 62-65.

论文

强风下高压输电塔线系统非线性随机动力响应

汪大海1;李杰1

作者信息 +

Nonlinear Stochastic Response of Transmission Tower-line System under Strong Wind

Dahai Wang1;Jie Li1

Author information +

文章历史 +

摘要

根据有限元分析得到单塔的非线性刚度软化特征，结合平均风下导线的动力特性，依据Lagrange方程建立了简化的输电塔线耦联系统的MDOF模型，将其应用于统计线性化方法，计算了系统在强风荷载下的非线性随机动力响应频域近似解。与数值模拟计算结果的比较显示，本文方法的计算结果不仅具备一定的精度，还可以对系统动力失稳的临界风荷载作出判断。

Abstract

An approximate 3DOF model for transmission tower-line system has been established，which is combined with softening nonlinear stiffness of tower by static FEM analysis and dynamic characteristics of conductor after distorted under mean wind load. Utilizing the method of statistical linearization, the analytical solution of stochastic response of tower-line coupling system under strong wind is derived. Comparing with numerical simulation, results show that the analytical solution by the herein developed procedure can be not only enough precise for engineering but also an auxiliary tool in judgment of the critical wind speed.

导出引用

汪大海;李杰. 强风下高压输电塔线系统非线性随机动力响应[J]. 振动与冲击, 2010, 29(6): 62-65

Dahai Wang;Jie Li. Nonlinear Stochastic Response of Transmission Tower-line System under Strong Wind[J]. Journal of Vibration and Shock, 2010, 29(6): 62-65