大型外浮顶立式储液罐被动控制方法

为了减轻大型外浮顶立式储液罐在地震灾害中的损失,基于ANSYS软件建立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,并将被动耗能技术引入大型外浮顶立式储液罐抗震分析中,在罐壁与浮顶之间分别安装摩擦阻尼器和粘滞阻尼器.数值分析结果表明,储液罐液体晃动幅度、罐壁竖向压应力和环向拉应力、罐底提离高度都有不同程度的减小.说明在罐壁与浮顶之间安装摩擦阻尼器或粘滞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.

Passive control method of large elevated liquid-storage tank with outside floating roof

In order to reduce the loss of the large elevated liquid-storage tank in earthquake, this paper introduces the passive control method to the anti-seismic analysis of large elevated liquid-storage tank with outside floating roof by building the finite element model which involves the fluid sloshing and tank bottom uplift with ANSYS. The viscous damper and the frictional damper are installed between the floating roof and rigid wall of the tank, respectively. The numerical 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 conducting passive control on the system of the tank.