高耸电气贮架地震反应分析的分支模态综合法

The Branch Mode Synthesis Method for Analyzing the Seismic Responses of the High Electric Bank

本文运用分支模态综合法对从国外引进的大型、高耸、瓷质电容器贮架进行了地震反应的数值分析与研究。计算结果表明，无隔震基础的贮架其地震内力将大大超过材料的容许应力，因而倒塌是不可避免的；但采用隔震基础并适当选取隔震基础的水平弹簧刚度系数，则可使其地震内力大大降低，贮架的安全得到切实的保证。本文的研究工作为此类电气贮架的国产化定型设计提供了一定的理论依据和计算方法。

In this paper, we discuss the seismic responses of the high capacitor bank which was imported from abroad. By using the mode synthesis method, the number of equations of motion is greatly reduced and will be fast to solve by numerical integration. The computational results show that: Without vibration isolating bases, the seismic stresses exceed greatly the allowable stresses of materials and the collapse of the bank can not be avoided. With the vibration isolating bases, by appropriately selecting the horizontal spring constant, the seismic stresses are greatly reduced and the safety of the bank is guaranteed. The research work provides some specific theoretic bases, computing methods and designing criterions for the self design of the capacitor banks.