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| Research on Track Irregularity and Unfavorable Wavelength of Speed—increased Railway |
| FANG Jian1,2，LEI Xiao—yan2，LIAN Song—liang2，Liu Lin—ya1 |
| 1．East China Jiaotong University，Nanchang，Jiangxi 330013，China；2．Tongji University，Shanghai 201804，China |
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Abstract Research purposes: Track irregularity is the main sources to induce the vibration of vechicle and track structure．For different types of track irregularity，the stimulation and disturbance direction and impact level are different．And the amplitude and wavelength of track irregularity produce significant effect on the dynamic Mcharacteristics of vehicle and track structure．So the study Can be done on revealing the power spectrums of track irregularity characteristics from the amplitude and wavelength to better know the vibration characteristics of vehicle．
Research conclusions:From the measured data of the track irregularity of Wuhan—Jiujiang Railway Line，the distribution functions of the power spectrums of the track irregularity are obtained．According to the measured acceleration of the vehicle vibration。the analysis iS made for correlation between the different track irregularities and vibration acceleration and the most unfavorable wavelength that brings about the vehicle vibration is known．
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Received: 15 April 2010
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2010, Vol. 27 
