高速动车组车体地板异常振动分析  

Study on Abnormal Vibration of Wood Floor of EMU Car Body

作　　者：张胜建 王勇[1] 董跃鲲 李龙[1] 张博宁 ZHANG Shengjian;WANG Yong;DONG Yuekun;LI Long;ZHANG Boning(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国家重点实验室,四川成都610031

出　　处：《机械制造与自动化》2024年第6期68-73,共6页Machine Building & Automation

摘　　要：随着动车组运营速度越来越快,车体越来越重视轻量化设计,设计是否合理对运行过程中车辆的平稳性和舒适性的影响有待研究。利用多体动力学软件SIMPACK建立带木地板车体的刚柔耦合动力学模型,计算磨耗轮状态下带木地板车体的平稳性和舒适度,对车体木地板进行优化以满足列车运行的平稳性和舒适度。结果表明:车辆在运行过程中,垂直于空气弹簧上方的车体地板会直接受到来自轨道的不平顺激励,当该激励与地板模态频率一致时,必然会引起木地板共振,导致木地板舒适度超标。通过提高木地板模态频率进行错频处理,使木地板舒适度达到合理范围。With the increasing running speed of EMU,much more importance is attached to the lightweight design for car body,and further research on the influence of the reasonable design over the stability and comfort in operation is necessary.The rigid-flexible coupling dynamics model of the car body with wooden floor is established by using the multi-body dynamics software SIMPACK,the stability and comfort of the car body with wooden floor under the condition of wearing wheels are calculated,and the wooden floor of the car body is optimized to meet the stability and comfort indicators of the train operation.The results show that the floor of the car body perpendicular to the air spring will be subject to the irregularity excitation from the track during the operation of the vehicle.When the excitation is consistent with the natural mode of the floor,it will inevitably cause the resonance of the wooden floor,resulting in the wooden floor comfort exceeding the standard.The modal frequency of the wood floor is improved for frequency error processing,enabling the comfort of the wood floor to reach a reasonable range.

关 键 词：高速动车组 木地板 模态分析 平稳性 舒适度 

分 类 号：U26[机械工程—车辆工程]