摘要
轨道车辆行驶过程中线路轨迹的变化将影响车体的随机振动响应,在车辆行驶垂向加速度、车体角速度以及姿态角等运动参数的基础上,建立了轨道车辆车体垂向振动力学模型。通过对变系数微分方程组的数值求解获取轨道车辆运行过程中车体垂向的振动响应,并通过与试验测试振动加速度信号比较检验了所建振动力学模型的合理性。分析了车体垂向随机振动随车辆运动参数的变化情况,结果表明:车体垂向随机振动与行驶垂向加速度存在一定程度的关联性,为轨道车辆安全运行和进一步基于运动和振动信号的故障诊断奠定了基础。
The change of the railway track during rail vehicles travel will affect the vertical random vibration response of the vehicle body. Based on the vertical acceleration of the vehicle,the angular velocity of the vehicle body and the attitude angle, the vertical vibration mechanics model of the rail vehicles is established. The vertical vibration response of the vehicle body during the operation of the rail vehicles is obtained by numerical solution of the differential coefficient differential equations. The rationality of the vertical vibration mechanics model is tested by comparing with the experimental test vibration acceleration signal. The variation of vertical random vibration of vehicle body with train motion parameters is analyzed.The results show that there is a certain degree of correlation between vertical random vibration of vehicle body and vertical acceleration. It lays the foundation for the safe operation of rail trains and further fault diagnosis based on motion and vibration signals.
作者
刘钊
程江琳
朱玉田
郑立辉
LIU Zhao;CHENG Jiang-lin;ZHU Yu-tian;ZHENG Li-hui(School of Mechanical Engineering,Tongji University,Shanghai 201804,China)
出处
《吉林大学学报（工学版）》
EI
CAS
CSCD
北大核心
2020年第5期1600-1607,共8页
Journal of Jilin University:Engineering and Technology Edition
基金
国家高技术研究发展计划(863计划)项目(2014AA041502)。
关键词
车辆工程
轨道车辆
垂向振动
运行参数
运动关联
vehicle engineering
rail vehicles
vertical vibration
motion parameters
motion correlations
