脉冲激励下车载储液罐动力响应分析

The dynamic response analysis on train liquid storage tanks under impulsive excitation

采用有限元软件对典型卧式车载储液罐静力响应、模态以及脉冲激励下的动力响应进行研究,研究结果表明:储液量的不同,对结构应力和变形有较大的影响。随着储液量的增加,储液罐固有频率不断降低,流体的晃动对储液罐的模态有较大影响。脉冲激励会使液体产生大幅晃动,变形和应力振荡明显,罐内充满液体能显著减少罐体的应力和总变形量。

Take the typical train liquid storage tank as research object, the static response, the vibration modes and the fluid-solid coupling dynamic responses of the tank are analyzed under the impulsive excitation using finite element software ANSYS. The re- search indicates that the difference of the liquid volume in tank has great influence to the structural stress and strain. With the in- creasing of the liquid volume, the tank natural frequencies reduced, so the liquid sloshing have great effect on the structural vibra- tion modes. And when the tank not filled with liquid, the liquid has large-scale amplitude sloshing, and the stress and strain are much bigger than the static condition. But if the tank is full of the liquid, the stress and total amount of deformity of the tank can be obviously reduced.