输电塔-线耦合体系参数振动的离散元模拟与分析

Simulation and Analysis on Parametric Vibration of Transmission Tower-Line Coupling System by Discrete Element Method

分析了塔-线体系的研究现状及存在的问题,建立了塔-线耦合振动问题的简化力学模型来描述塔与线之间的作用机理,利用Hamilton原理推导了塔-线组合结构的非线性运动方程,最后应用离散元数值模拟方法验证了其在分析输电塔线体系参数振动中的有效性,并揭示了该体系耦合振动中存在的参数振动的规律.

The present research process and some problems unsolved on transmission tower-line system are discussed in this paper,and a simplified mechanical model is established to disclose the mechanism of interaction between the transmission tower and line.Based on the mechanical model,nonlinear motion equations are pushed out by the Hamilton’s principle.Finally,the numerical simulation is carried out in order to verify the validity of studying the parametric vibration of the coupling system by using DEM,also,according to the calculation test,further recognitions are obtained during the coupled system vibrating.