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| Research on the Evaluation Metliod of Structural Difference Irregularity of Vibration Damping Track |
| HE Zhen – xing |
| (China Railway Eryuan Engineering Group Co. Ltd，Chengdu，Sichuan 610031，China) |
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Abstract Abstract :Research purposes： Due to the use of vibration damping track，the track differences caused the track V dynamic irregularity. As for structure design of vibration reduction track，it is one of tlie key technologies to reduce the dynamic performance of tlie vehicle and track system. But at present，there is a lack of theoretical system research，and no standard and specification for the track structural difference irregularities. Therefore， a multi index comprehensive evaluation metliod based on grey correlation degree is proposed. Research conclusions ：( 1 ) The dynamic response parameters of various track irregularities are calculated using the three - dimensional vehicle track coupling dynamic model. (2 ) In order to avoid the subjective influence of the evaluation results，the construction of t!ie reference object is based on the engineering standards and specifications of t!ie geometric irregularity. (3) The evaluation results are presented in the grey relational degree sequence，which is easy to understand and apply. (4) The structural difference irregularities of the three typical vibration damping tracks are equivalently satisfying the requirements of engineering standard of geometric irregularity. Under the excitation，dynamic response propertie of the vehicle and track system of floating slab track is better，and that of vibration damping fastener is relatively poor. (5 ) The multi index comprehensive evaluation met!iod has the following characteristics. The evaluation information comprehensive ability is strong, the combination with engineering is closely，and the operation process is simple and convenient. This method has reference value for the study of the track parameters and the evaluation of the program by using the dynamic simulation method.
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Received: 23 December 2016
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2017, Vol. 34 
