基于双向流固耦合的铁路客车水箱的强度分析

STRENGTH ANALYSIS OF RAILWAY PASSENGER VEHICLE WATER TANK BASED ON TWO-WAY FLUID-SOLID INTERACTION

以铁路客车水箱为研究对象,采用双向流固耦合方法,利用有限元分析软件Ansys Workbench对客车水箱箱体内液体冲击晃动问题进行了建模与数值分析。通过研究在行车纵向方向对不同盛水量的水箱施加连续冲击载荷,获得了水箱结构应力随时间变化历程以及水箱结构变形随时间变化历程。研究结果表明:箱体所受最大应力与最大位移随盛水量的增多而逐渐增大。通过分析,确定了箱体结构的薄弱位置,通过绘制各测点试验值与仿真值的对比曲线,验证了水箱计算模型与实际模型的相符程度,表明所采用的双向流固耦合方法和水箱模型具有较好的可靠性,为铁路客车水箱结构的设计及优化提供了使用可靠的分析方法。

Taking the railway passenger car water tank as the research object,the bidirectional fluid-solid coupling method is used to model and numerically analyze the liquid impact sloshing problem in the passenger car tank using the finite element analysis software ANSYS Workbench. By studying the continuous impact load on the water tanks with different water contents in the longitudinal direction of the vehicle,the change history of the tank structure stress with time and the deformation history of the tank structure with time are obtained. The results show that the maximum stress and maximum displacement of the box gradually increase with the increase of water content. Through analysis,the weak position of the box structure is determined,By plotting the comparison curve between the test value and the simulation value of each measuring point,The consistency between the calculation model of the water tank and the actual model was verified. Shows that the two-way fluid-solid coupling method and water tank model used in this paper have good reliability,which provides a reliable analysis method for the design and optimization of the water tank structure of the railway passenger car.