气体绝缘金属封闭输电线路GIL的抗震性能分析

Seismic Performance Analysis of Gas Insulated Metal-enclosed Transmission Line

摘要:
目的某项目500 kV GIL管道具有单跨长度跨大，对地距离高的特点，需要验证气体绝缘金属封闭输电线路（GIL）的抗震性能。
方法建立GIL管道物理结构三维有限元模型，并进行地震响应分析。
结果通过模态分析获得了结构的振型特性并利用反应谱分析方法分析得出了不同地震反应谱激励下结构的动力特性及地震响应。
结论 500 kV GIL输电管道结构在7度的地震作用下具有一定的安全系数。

Abstract:
Introduction The 500 kV GIL pipeline of a project has the characteristics of a large single span and a high distance to ground. It is necessary to verify the seismic performance of gas-insulated metal-enclosed transmission lines （GIL）.
Method A three-dimension finite element model of GIL pipeline physical structure was established to perform a seismic response analysis.
Result The mode shape characteristics of the structure were obtained through modal analysis. The seismic performance of the GIL under different seismic excitations was then specifically evaluated by using the response spectrum analysis method.
Conclusion The 500 kV GIL transmission pipeline structure has a certain safety factor under the earthquake with a seismic intensity of 7 degrees.