摘要
轮轨异常磨耗是引起车辆振动响应异常的重要原因,其中踏面凹磨和车轮多边形是最常见的动车组(EMU)磨耗形式。为研究某型动车组在踏面磨耗和车轮多边形下的振动响应规律,建立了非线性车辆动力学模型,采用短波分量与轨道谱叠加生成轨道不平顺,利用磨耗参数生成不同磨耗程度的踏面文件,研究了不同组合工况下的振动响应规律。仿真结果表明:车轮多边形的波深对车辆系统各层级的振动响应作用显著,随着车轮多边形阶数的增加,各层级的频域响应幅值先增加后减小,当阶数为7时,幅值达到最大值;踏面凹磨对各层级垂向频谱分布影响较小,对构架层横向频谱分布影响显著。随着磨耗程度的加深,构架横向主频向右偏移,其6~30 Hz频带响应幅值增加明显;车轮多边形阶数与波深对动车组各层级的垂向振动传递率影响不显著,悬挂系统对高于2 Hz的频带有良好的衰减作用。
The abnormal wheel/rail wear is an important cause of abnormal vibration response of rail vehicles.The hollow-worn tread and wheel polygons are the most common forms in electric multiple unit(EMU)wheel wear.In order to study the vibration response of a special EMU with hollow worn or polygons,the nonlinear rail vehicle dynamics model was established,and track irregularity generated by superposition of short wave component and track spectrum,using abrasion definition parameters to generate different hollow-worn tread files,to study the vibration response characteristic under different combination conditions.The simulation results show that the wave depth of the wheel polygon has a significant effect on the vibration response of each level of the rail vehicle system.With the increasing the order of the wheel polygon,the response amplitude of each level in the frequency domain increases at first and then decreases.When the order is 7,the amplitude reaches the maximum value.Hollow-worn tread has little effect on vertical spectrum distribution of each level,but has significant effect on lateral spectrum distribution of bogie frame.With the depth of the wheel wear,the main frequency dominant of the bogie frame shifts to the right side,and the response amplitude of the 6-30 Hz frequency bandwidth increases significantly.The wheel polygon order and amplitude have no significant effect on the vertical vibration transmissibility of each EMU level,and the suspension system has a good attenuation effect on the frequency band beyond 2 Hz.
作者
何辉永
郭冰彬
孙效杰
王恒亮
严建
HE Huiyong;GUO Bingbin;SUN Xiaojie;WANG Hengliang;YAN Jian(State Key Laboratory of Heavy Duty AC Drive Electric Locomotive Systems Integration,CRRC Zhuzhou Locomotive Co.,Ltd.,Zhuzhou 412001,Hunan,China;School of Railway Transportation,Shanghai Institute of Technology,Shanghai 201418,China;Research Institute of Science and Technology,China Railway Shanghai Bureau Group Co.,Ltd.,Shanghai 200333,China)
出处
《应用技术学报》
2023年第4期363-369,共7页
Journal of Technology
基金
大功率交流传动电力机车系统集成国家重点实验室开放课题(13221430000490)资助。
关键词
轮轨异常磨耗
踏面凹磨
车轮多边形
振动特性
wheel-rail wear
hollow-worn tread
wheel polygons
vibration characteristics
