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目前铁路危险货物罐式集装箱的结构强度冲击试验中,试验充装介质的重心高度与实际运输介质的重心高度一致性难以实现。针对上述问题,应用Lagrange方程建立冲击试验中罐式集装箱的力学模型,对其进行受力分析;并用ANSYS软件建立液化天然气罐式集装箱的仿真模型,设计3种充装工况,对不同充装重心高度下的仿真模型进行有限元计算,验证了力学分析结论。研究结果表明:冲击试验中罐式集装箱框架的应力分布及应力值与罐内充装货物的重心高度基本无关,仅与充装货物的重量有关。
At present, in the structural strength impact test of railway dangerous goods tank containers, the consistency of the center of gravity of the test filling medium with the center of gravity of the actual transportation medium is difficult to be achieved. In order to solve the above problems, the Lagrange equation is used to establish the mechanical model of tank container in impact test, and the force analysis is carried out. The simulation model of liquefied natural gas tank container is established by ANSYS software. Three kinds of filling conditions are designed, The simulation model under the center of gravity is calculated by finite element method, and the mechanical analysis conclusion is verified. The results show that the stress distribution and stress of the tank container frame in impact test have nothing to do with the center of gravity of the filled products in the tank, and only relate to the weight of the filled goods.