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370 t凹底车是目前载重量最大的凹底车,考虑到结构振动对车辆平稳性的影响,把凹底架、大底架和小底架做成柔性体,建立刚柔混合模型进行仿真分析.对比美国5级谱和铁科院实测谱,并通过傅氏逆变换转换为时域信号,用模态综合法进行仿真分析并与试验数据进行了对比,发现美国5级谱的垂向不平顺比我国实际线路情况要恶劣,短波轨道不平顺对该车的结构振动有较大的影响.
370 t concave car is currently the largest undercar load vehicle, taking into account the structural vibration of the vehicle stability, the concave chassis, large chassis and small chassis made of flexible body, the establishment of rigid and flexible mixed model for simulation By comparing the spectra of the US 5 spectrum with those of the ASTRI, the signals were converted into time-domain signals by inverse Fourier transform, and the results were compared with the experimental data by the modal synthesis method. It was found that the vertical Uneven than the actual situation of the Chinese line to bad, short-wave track irregularities on the vehicle structure vibration have a greater impact.