Simulation of liquid slosh in braking process of tank truck
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摘要: 采用Volume of Fluid (VOF) 模型对罐车制动时液体的晃动进行了数值模拟,对单室受力、受力位置及整车轴荷分配进行了计算,并通过与实验结果的对比验证了计算方法的可靠性.计算结果表明,无防波板时,随减速度增加,单室 x,y方向受力峰值增大,整车轴荷比增大;随充液比增加,单室x方向受力峰值先增大后减小,y 方向受力峰值增大,制动初始与结束时充液比越大轴荷比越大,1s左右充液比越大轴荷比越小;单室带防波板时,随防波板面积增加, x,y 方向受力峰值减小,当防波板面积大于横截面的40%时,增加防波板面积能显著改善罐体受力,且防波板面积越大轴荷比峰值越小.Abstract: The liquid sloshing in braking process of tank truck was simulated by volume of fluid (VOF) model. The forces and their locations of a single room and weight distribution of a truck were calculated. The reliability of the calculation method was validated by comparing with experimental results. The results show that the maximum of Fx (force in direction x), Fy(force in direction y) and C (The ratio of weight acting on the front axle and rear axle) increase as the deceleration increases without a baffle. When the liquid filling ratio increases, the maximum of Fx increases firstly and decreases afterwards, the maximum of Fy increase, and C increases in the starting and ending period of braking process and decreases during the period around 1 s. When there is a baffle, as the area of the baffle becomes bigger, the maximum of Fx, Fy and C decreases.
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Key words:
- tank truck /
- volume of fluid (VOF) method /
- liquid sloshing /
- two phase flow
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