台风“麦莎”作用下输电塔风荷载反演

Research on wind load inversion of electrical transmission tower with typhoon Matsa

由于输电塔结构外部作用实时测量难度大、数据精度低,可以根据现场测量结构动力特性,以实测动力响应来反演结构的动态荷载。本文利用某输电塔在台风"麦莎"作用下塔线耦联体系的现场风振实测结果,采用基于缩聚串联多自由度模型的荷载反演方法,反演得到输电塔在台风作用下的风荷载分布和地线、导线的动张力时程。

The electrical transmission tower is the main part of large complex lifeline system. Because of the difficulty to make the real time measurement and low precision of the data, the dynamie load inversion by the measured dynamic response becomes an effective way to measure the load indirectly. According to the measured dynamic response of tower - line coupling system in an electrical transmission tower with typhoon Matsa, the inversion of wind load distribution and dynamic tension history of ground wire and conductors are given basing on the inversion method of condensation series multi - freedom model.