标准轨道衡有限元分析

Finite element analysis for standard rail weighbridge

轨道衡是称量铁路货车载重的衡器,标准轨道衡是轨道衡领域的最高计量标准。以标准轨道衡载重的核心部件承重梁为研究对象,利用SolidWorks建立三维模型,运用ANSYS进行有限元分析,分析承重梁在各种工况下的最大位移、等效应力;运用模态分析分析承重梁前10阶固有频率及相应的振型。分析结果表明:标准轨道衡结构强度、刚度满足要求;承重梁的1阶固有频率远离外界振动频率;低阶模态振幅较小,不会影响标准轨道衡计量性能。结果验证承重梁设计的合理性,分析数据为标准轨道衡结构优化提供参考依据。

The rail weighbridge is a weighing instrument for measuring the weight of the railway freight. The standard rail weighbridge is the highest measurement standard of the rail weighbridge. This paper focus on the bearing beam which is the key component of the standard rail weighbridge. Employing Solid Works to establish a 3D model and using ANSYS for finite element analysis. The analysis covers the displacement contour cloud maps, equivalent stress contour cloud maps of the bearing beam with different working conditions. The modal analysis shows the results of the natural frequencies and corresponding vibration models of the first 10 orders. Analysis results show that the bearing beam’s strength, stiffness are meeting the requirements of the standard rail weighbridge. The bearing beam’s first natural frequency is far away from the frequency which caused by the external impacts; the amplitudes of the low-modals are very small that could not influence the standard rail weighbridge. The analysis verifies the rationality of the bearing beam’s design and the analytical data could provide some references for the optimization of the standard rail weighbridge structure.