750 kV变电架构隔震性能的有限元分析

针对750 kV变电架构在地震中易损性问题。基于ANSYS有限元软件,分别建立了750kV构架隔震前后的有限元模型,输入地震波进行动力时程响应分析。结果表明,采用合适的隔震支座后电力架构基频降低,顶端位移响应、杆件应力以及倾覆力矩较隔震前都有不同程度的减小,验证了隔震系统的有效性。

Finite element analysis of isolation performance for 750 kV structure gantry

The 750 kV structural gantry is a high and heavy load steel latticed structure,which is of vital importance in the 750 kV electric substation. It has high vulnerability during earthquakes. In this work,finite element models of 750 kV structural gantry with and without isolation layer are established by ANSYS. Dynamic time-history analysis are carried out by inputting seismic waves for these two models. The results show that by adopting suitable isolation bearing the structure gantry with base isolation has lower frequency. Apart from this,its top displacement response and pole stress have different degrees of reduction compared to those of gantry without base isolation. These conclusions indicate that it is effective to use isolation system,which has provided a basis for practical application of isolation technology in power tower.