关键词: 振动与波, 结构振动, 声学特性, 高速列车, 轨道谱分析

Abstract: Modal analysis and track spectral analysis were applied on a model of high-speed passenger train, and the acoustical response property of the train was investigated using finite element method. The result of structural modal analysis indicates the first 200th order natural frequency scheme of the train is 0.62-100.27 Hz. For the first 6th order, the scheme is limited to 0.62-1.51 Hz, and the frequencies character for the vibrations of the whole body of the train corresponding to the bogie. The displacement response power spectral density has a larger value in the frequency of 0-2.00 Hz under the exciting of a 200 km/h general track spectrum of China. The first 200th order acoustical natural frequency increases from 0 Hz to 126.66 Hz, and the modes become more complex if the order increases.