双向地震作用下外浮顶立式储液罐被动控制减振分析

PASSIVE CONTROL VIBRATION REDUCING ANALYSIS OF LARGE ELEVATED LIQUID-STORAGE TANK WITH OUTSIDE FLOATING ROOF UNDER BIDIRECTIONAL EARTHQUAKE

基于ANSYS软件建立了考虑液体晃动和罐底提离的外浮顶立式储液罐有限元模型,并在罐壁与浮顶之间分别安装摩擦阻尼器和粘滞阻尼器,进行双向地震作用下结构被动控制减振分析。研究结果表明,储液罐液体晃动幅度、罐壁竖向压应力、罐底提离高度都有不同程度的减小,说明安装不同形式的阻尼器可以减轻储液罐地震灾害,从而有效提高外浮顶立式储液罐抗震能力。

This paper introduces the ANSYS finite element model of large elevated liquid-storage tank with outside floating which involves the fluid sloshing and tank bottom uplift.The viscous damper and the frictional damper are installed between the floating roof and rigid wall of the tank,a passive control vibration reducing analysis is carried out in order to reduce the loss of the large elevated liquid-storage tank in earthquake respectively.The results show that the amplitude of fluid sloshing,the vertical compressive stress,the hoop tensile stress and the height of the bottom tank uplift are all reduced by installing dampers.The results also illustrate that the seismic response of the large elevated liquid-storage tank can be effectively reduced by erecting different types of dampers.