P2共振型波磨激励下轮轨垂向动力学响应研究  

Research on Vertical Dynamics Response of Wheel-Rail under P2 Resonant Wave Corrugation Excitation

作　　者：蔡学军 CAI Xuejun(State Key Laboratory of Traction Power,Southwest Jiaotong University,Chengdu 610031,China)

机构地区：[1]西南交通大学牵引动力学国家重点实验室,四川成都610031

出　　处：《机械》2022年第12期32-38,共7页Machinery

基　　金：四川省国际科技创新合作项目(2021YFH0006);牵引动力国家重点实验室自主课题(2019TPL_T17)。

摘　　要：为分析小半径曲线上P2共振型波磨激励下轮轨垂向动力学响应,于时域内建立车辆-轨道耦合动力学模型。在69 Hz的P2共振型波磨激励下,将车辆通过速度、波磨波长、波深等参数的变化考虑在内,模拟线路中不同工况对轮轨垂向动力学响应的影响。结果表明:在波深为0.2 mm时,随着车辆运行速度和波磨波长变化,轮对垂向动力学响应均在69 Hz达到最大值,说明与其他波磨通过频率相比,P2共振型波磨对轮对垂向响应影响最大;与无钢轨波磨工况相比,钢轨波磨工况的轮轨垂向动力响应均明显提高,且响应频率与波磨通过频率吻合;随着波磨波深的增加,轮轨间动力学响应加剧,这与现场实际情况和以往研究结论相符。In order to analyze the vertical dynamics response of wheel-rail under P2 resonant wave corrugation excitation on the small radius curve,the vehicle-track coupling dynamics model was established in the time domain.Under P2 resonant wave corrugation excitation of 69 Hz,the changes of vehicle passing speed,wave corrugation wavelength,wave corrugation depth and other parameters were taken into account to simulate the influence of different working conditions on the wheel-rail vertical dynamic response.The results show that when the wave depth is 0.2 mm,with the change of vehicle running speed and wave corrugation wavelength,the vertical dynamics responses of wheel sets reach the maximum at 69 Hz.It indicates that,compared with other wave corrugation with passing frequency,P2 resonant wave corrugation has the greatest influence on the vertical response of wheelset.Compared with the condition without rail corrugation,the vertical dynamic response of wheel and rail under rail corrugation condition is significantly improved,and the response frequency is consistent with the passing frequency of corrugation.The dynamics response between wheel and rail intensifies with the increase of wave corrugation depth,which is consistent with the actual situation on site and the previous research conclusions.

关 键 词：小半径曲线 P2共振型波磨 车辆-轨道耦合动力学模型 轮轨垂向动力学响应 

分 类 号：U270.1[机械工程—车辆工程]