摘要
采用双级隔振系统分析了车下有源设备对车体振动的影响,推导出车下有源设备与弹性车体耦合振动数学模型,得到车体和有源设备运动特性表达式。通过数值计算及考虑车体弹性的刚柔耦合动力学仿真计算,表明了有源设备对车体局部振动影响明显;设备转动不均衡量的增大会导致局部振动范围的进一步扩大;当采用不同隔振方式时,双级隔振系统可以更有效地降低车体弹性振动。通过对隔振系统悬挂参数研究发现,框架与设备质量比主要影响设备自身振动,对车体减振作用较小;合理的悬挂刚度和阻尼比能有效降低设备与车体之间的耦合作用,并且悬挂刚度对系统隔振性能影响更明显。
The two-stage vibration isolation system was used to analyze the influence of active equipment under the train on carbody vibration.A mathematical model of coupled vibration of active equipment and elastic carbody was deduced,and the expression of motion characteristics of carbody and active equipment was obtained.Through the numerical calculation and the rigid-flexible coupling dynamics simulation calculation considering the elastic carbody,it is shown that the active equipment has obvious influence on the local vibration of the carbody.The increase of the rotational unbalance of the equipment will result in a further increase of the local vibration range.When different vibration isolation modes were adopted,the two-stage vibration isolation system can reduce the elastic vibration of the carbody more effectively.The research on the suspension parameters of the vibration isolation system shows that mass ratio of the frame and equipment mainly affects the vibration of the equipment itself and has little effect on the vibration reduction of the carbody.Reasonable suspension stiffness and damping ratio can effectively reduce the coupling effect between the equipment and the carbody,and the suspension stiffness has more effect on the system vibration isolation performance.
作者
李佳明
曾京
汪群生
Li Jiaming;Zeng Jing;Wang Qunsheng(State Key Laboratory of Traction Power,Southwest Jiaotong University,Chengdu 610031,China)
出处
《现代制造工程》
CSCD
北大核心
2019年第10期64-69,共6页
Modern Manufacturing Engineering
基金
国家重点研发计划项目(2016YFB1200505)
牵引动力国家重点实验室课题项目(2015TPL_Z03)
关键词
弹性车体
车下悬挂
车下有源设备
车体振动
双级隔振系统
elastic carbody
suspension under the train
active equipment under the train
carbody vibration
two-stage vibration isolation system
