运动罐体内液体晃动的双向流固耦合数值分析

Numerical Simulations on Liquid Sloshing in the Moving Tank During Braking of a Tank Truck by Fluid Structure Interaction Method

针对部分充液运动罐体内液体晃动对罐车运输安全的问题,以带有单个防波板的运动罐体模型为基础,采用双向流固耦合方法,对运动罐车在刹车过程中罐体内液体的晃动现象进行了数值分析,研究了不同材料防波板在载液罐体内的受力情况,以及在刹车制动过程中罐体内气液两相分布状态,从而获得了采用单向耦合方法不能获得的罐体结构应力随时间的变化历程.研究结果表明:罐体端面受力随着充液比的增加而增大,当充液比为0.8时,罐体的总体受力最大;对于不同材料的防波板,当防波板变形较小时,其对罐体端面和罐体整体受力的影响相对较小,防波板的最大剪切应力随着材料剪切模量的增大而非线性减小.

The study on the liquid sloshing in a moving tank with partially filled liquid is very important to ensure the safety in the tank truck transport.A numerical simulation for the interaction between the baffle and gas-fluid flow in the process of braking was performed by building a simplified model of a moving tank with a piece of baffle.The effects of different baffle materials and different filling ratios on the force which is exerted on the baffle and the tank wall were analyzed.The time history of the baffle stress was obtained with the two-way fluid structure interaction method.The results show that the force exerted on the end wall of the tank increases with the filling ratio.When the filling ratio is 0.8,the force exerted on the whole tank has the maximum value.For the baffle with different materials,the smaller baffle deformation will lead to slight influence on the force exerted on the end wall and the whole tank.In addition,the maximum baffle shear stress decreases nonlinearly with an increase in the material shear modulus.