基于两种模型下的储水罐应力计算

Stress Calculated by Two Models of Large Storage Tank

分别采用弹簧质量模型和流固耦合模型2种方式对大型储水罐进行相互验证计算。弹簧质量模型基于HOUSNER理论,计算出脉冲液体质量M0、脉冲液体重心高度H0、对流液体质量M1、对流液体重心高度H1以及弹簧模拟对流液体晃动频率的等效刚度k1,并以此作为有限元模型的输入参数;流固耦合模型采用ANSYS的流体单元fluid80模拟液体,壳单元shell181模拟储水罐,考虑液体及结构阻尼,计算结构在地震时程下的响应。

Two methods for mutual verification calculation of simplified model and fluid solid coupling model are used in the stress analysis of the large storage tank. The calculation for pulsed liquid quality M0, the height of gravity of pulsed liquid H0, the height of gravity of liquid convectionHl, and the equivalent stiffness k1 of spring simulating slosh frequency of liquid convection is based on HOUSNER theory and as the input parameters of finite element model. FLUIDS0 elements are used in the fluid solid coupling model to model the fluid and SHELL181 elements to model the storage tank. Fluid solid coupling model considering the structure damp is used to calculate the response of the tank under seismic time history.