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基于有限元分析方法,对运煤敞车的结构简化、单元选取、边界及约束处理等建模技术进行阐述。应用AN-SYS对运煤敞车空车和重车进行计算模态分析。结果表明,该敞车空车和重车模态振型基本相同,但同振型的空车模态频率均比重车高。与试验模态相比,车体刚体振动的模态频率与试验结果误差相对较大,而弹性振动的模态频率较接近,这为车体的轻量化设计提供了合理的设计模型。
Based on the finite element analysis method, this paper elaborates on the structural simplification, unit selection, boundary and constraint processing of the coal gondola. Application of AN-SYS to Calculate Modal Analysis of Empty Gondolas and Heavy Cars for Coal Gondola. The results show that the modal shapes of the empty car and the heavy car of the gondola are basically the same, but the modal frequencies of the empty car of the same type are heavier than the car. Compared with the experimental modal, the modal frequency of the rigid body vibration of the car body is relatively large compared with the experimental results, while the modal frequency of the elastic vibration is relatively close, which provides a reasonable design model for the lightweight design of the car body.