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| Simulation Study on Impact of Track Irregularity on Dynamic Response of Vehicle |
| FANG Jian1，LEI Xiao － yan1，LIAN Song － liang2，LIU Lin － ya1 |
| 1． Research Centre for Environment Vibration and Noise，East China Jiaotong University，Nanchang 330013，China;2． School of Transportation，Tongji University，Shanghai 201804，China |
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Abstract Research purposes: The main purpose is to study the impact of curved track irregularities on vehicle dynamic characteristics with the measured data and simulation calculation． With the measured data on the curved track irregularity from the track inspection car，the statiscs analysis was made for the relation between the track irregularity of speed － raise railway and the vehicle vibration acceleration and the primary estimation of track spectrum of Wuhan － Jiujiang Railway was made． The vehicle － track dynamic model was established with the software Adama / Rail to analyze the impacts of the types，amplitude and wavelength of the track irregularity on the stability and safety of the vehicle with the measured data． The wavelength range of the track irregularity that negatively impacted the train running was offered．
Research conclusions: The vertical track irregularities produced the obvious impact on vehicle vertical vibrations． And the track direction irregularities produced the obvious impacts on both vertical vibrations and transverse vibrations． In order to avoid the resonance of the train at the speed of 110 km / h，the track irregularities of 2． 5 m，3． 72 m，20 m and 28 m wavelengths would be controlled．
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Received: 20 February 2011
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2011, Vol. 28 
