车体响应与轨道不平顺的相干分析_刘玉标.pdf

CSTAM2013-P28-E0069 * ( , 100190) COHERENCE ANALYSIS BETWEEN THE VEHICLE VIBRATION RESPONSE AND TRACK IRREGULARITIES * LIU yu-biao , Zhang ying-ying (Key Laboratory for mechanics in Fluid Solid Coupling Systems, Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190, China) Abstract: The measured statistic samples of track irregularities for JingJin passenger railway line are transformed to its power spectrum density (PSD) mode using the Fast Fourier Transform (FFT) method. We analyze the track irregularity distribution on each wavelength and the periodic track irregularities. Through dynamic calculations we obtained the natural frequencies, the vibration mode and its corresponding track irregularity wavelength of the vehicle. According to the vehicle response, the coherence calculations are utilized to analyze the relationship between its horizontal, vertical acceleration and each track irregularity. Combination with the vehicle vibration acceleration PSD and its structural characteristic natural frequencies, the main vibration source and the sensitive wave length that brings about the vehicle vibration is studied. Hereby, some suggestions can be proposed to control and maintain the track irregularities. Key words: track irregularity; PSD; coherence calculations; vehicle vibrate acceleration , [1] [2] [3]