球形储液罐液-固耦联地震反应及减振方法

Fluid-structure interactive seismic response and vibration dissipation method of spherical liquid-storage tank

摘要:

为了减轻球形储液罐在地震灾害中的损失,基于ANSYS软件建立了考虑液体晃动的1000m3球形储液罐有限元模型,研究了球形储液罐的地震反应以及液体晃动对地震反应的影响,结果表明支撑体系是球形储液罐的薄弱环节,为此通过引进被动控制技术和改变支撑角度的措施研究球形储液罐的减振方法.数值分析结果表明,被动控制技术对球形储液罐具有较好的减振效果,改变支柱支承角度可以有效提高球罐的抗震性能.

Abstract:

To alleviate the damage of spherical liquid-storage tank under earthquake,this paper performs seismic response analysis by building a finite element model with ANSYS for the tank,which involves fluid sloshing with the volume of 1000 m3.The effect of fluid sloshing on the seismic response is studied.The result shows that the support system is the weak link of the tank.Accordingly,this paper investigates the methods for dissipating the vibration energy by introducing the passive control technology and changing the angle of the support system.Numerical analysis result shows that the seismic response of the spherical liquid-storage tank can be effectively reduced by conducting passive control on the system of the tank,and the angle change of support system can improve the anti-seismic capacity of the tank effectively.