摘要
为提高车辆系统振动响应的计算精度,基于刚柔耦合动力学理论,将轮对、构架和轨道均考虑为柔性体,建立了考虑多柔性因素的车辆-轨道耦合动力学模型,对比分析了轮轨间动态作用的振动特性,研究了多柔性因素下的轮轨接触动态性能和运行平稳性能。结果表明:多柔性因素下,车轮振动加速度在垂向上有较大变化,柔性部件的横向运动出现"错位";各项动力学指标均有变化;车体加速度在垂向上最大增幅为36.7%,而横向上却与线路半径有一定的关系;横向上,多柔性因素下车体Sperling指数降低,降幅为9.5%,而垂向上该指数却增高16.6%。
In order to improve the calculation accuracy of the vibration response of vehicle system, based on the rigid flexible coupling dynamics theory, the wheelset, frame and track were considered as flexible bodies, and the vehicle track coupling dynamics model considering multiple flexible bodies was established. The vibration characteristics of the dynamic interaction between wheel and rail were compared and analyzed, and the dynamic performance of wheel-rail contact and smooth-running performance under multiple flexible factors were studied. The results show that the vibration acceleration of the wheel varies greatly in the vertical direction and the transverse motion of the flexible parts is "misplaced" under the condition of multi-flexibility. The dynamic parameters are also changed. The acceleration of the car body increases by 36.7% in the vertical direction, while it has a certain relation with the line radius in the transverse direction. The transverse Sperling index decreases by 9.5%, while the vertical Sperling index increases by 16.6% under the multi-flexibility factors.
作者
岳鹏
马森
李国芳
雷银亮
YUE Peng;MA Sen;LI Guofang;LEI Yinliang(College of Railway Technology,Lanzhou Jiaotong University,Lanzhou,Gansu 730000,China;School of Mechatronic Engineering,Lanzhou Jiaotong University,Lanzhou,Gansu 730070,China;Equipment Technology Center of State Railway Administration,Beijing 100070,China)
出处
《机车电传动》
北大核心
2021年第4期34-41,共8页
Electric Drive for Locomotives
基金
国家自然科学基金项目(11462011)。
