曲线轨道不平顺对车辆动力响应影响仿真研究

研究目的:本文旨在通过现场实测和仿真计算研究曲线轨道不平顺对车辆动力特性的影响。首先,利用轨检车实测数据对我国提速线路轨道不平顺与车辆振动加速度之间的关系等进行了统计分析及相关分析,对武九线曲线段的轨道谱也进行了初步估计。其次,采用动力学仿真软件Adams/Rail建立车辆-轨道动力学模型,并以实测数据作为验证手段,分析了轨道不平顺类型、幅值和波长对车辆运行平稳性和安全性的影响,提出了对行车运行有不利影响的不平顺波长范围。研究结论:高低不平顺对列车垂向振动影响显著,轨向不平顺对列车垂向、横向振动均有显著影响,当列车以110 km/h运行时,为了避免列车在不平顺激励下产生共振,应该对2.5 m、3.72 m、20 m和28 m波长的轨道不平顺进行控制。

Simulation Study on Impact of Track Irregularity on Dynamic Response of Vehicle

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.