摘要
针对立式钢制储罐抗震计算的模型简化问题,将储罐简化为三质点体系,即晃动质点、液固耦合质点、刚性脉冲质点。液体的晃动频率远低于罐壁的频率,所以可以忽略液体的晃动和壳体振动的耦合,将储罐简化为液固耦合质点、刚性脉冲质点的二质点体系。通过数值分析发现可将储罐简化为单质点体系,即只考虑液固耦合质点。与规范算法(只能计算出最大值)相比,误差不大。因此,可采用单质点体系计算得出储罐在任意地震波输入下任意时刻的地震时程响应,从而大大减少了计算工作量。
Simplification for aseismic computing model of vertical steel storage tank is expounded in this paper. The storage tank is simplified into three particle system, including slosh particle, liquid - solid coupling particle and rigidity pulse particle. The shaking frequency of liquid is lower than the steel wall＇s, so the coupling between liquid and steel wall is ignored, therefore the storage tank is on second thoughts simplified into two particle system, including liquid - solid coupling particle and rigidity pulse particle. The storage tank is finally simplified to single particle system by numerical analysis, only liquid - solid coupling particle is considered. Comparing with code method （computing maximum value only）, the error is small., Earthquake response of storage tank under any earthquake wave input at anytime can be computed with single particle system, so computational efforts are reduced significantly.
出处
《压力容器》
北大核心
2008年第4期16-20,共5页
Pressure Vessel Technology
基金
黑龙江省自然科学基金项目(E0309)
关键词
储罐模型
液固耦合
时程分析
model Of storage tank
liquid - solid Coupling
history analysis
