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本文提供一个用于计算储液罐在竖向地震作用下动力和稳定分析的有限元方法。该方法是将罐壁用薄壁环壳单元进行离散,对液体则用解析解,然后用边界积分的方法,从而求解罐-液耦联振动。另外利用反应谱方法,求出地震动力响应,最后用准静力方法,采用前屈曲线件理论对储罐进行动力稳定分析。同时本文还给出了时程分析的计算方法。
This paper presents a finite element method for the calculation of dynamic and stability analysis of reservoirs under vertical seismic action. In this method, the tank wall is discretized with a thin-walled ring-shell element, and an analytical solution is used for the liquid, and then a boundary integral method is used to solve the can-liquid coupling vibration. In addition, using the response spectrum method, the seismic dynamic response was obtained. Finally, the quasi-static method was used to analyze the dynamic stability of the storage tank using the flexion curve part theory. At the same time, this paper also gives the calculation method of time-history analysis.