摘要
针对高速列车车轮镟修后轮轨匹配等效锥度低所造成的车体低频晃动问题,基于实车参数,建立四动四拖八编组全自由度列车动力学模型,并从单车系统和车间悬挂系统对列车模型的准确性进行验证,再现了低轮轨等效锥度下发生的晃车现象。然后从车间纵向减振器性能参数方面提出抑制车体低频横向振动的优化方案,并根据方案设计了新车间纵向减振器,同时对其开展了减振器性能试验。最后将试验获得的动刚度和动态非线性阻尼特性融入到列车动力学模型中,通过对比安装新、旧车间纵向减振器的列车各节车辆的横向平稳性指标验证了优化方案的可行性。研究结果表明:车体低频横向振动由车体侧滚和摇头振动耦合而成;可以通过降低车间纵向减振器动刚度,提高其阻尼系数来有效抑制车辆的低频横向振动;新设计的车间纵向减振器低频段时动刚度较小,动阻尼较大,符合方案所提出的技术要求;与原车间纵向减振器相比,列车安装优化后的车间纵向减振器不仅在晃车段能明显抑制车体主频在1.11~1.33Hz的横向振动,大幅度降低各车辆的横向平稳性指标,还能进一步提高未晃车段各节车辆的横向平稳性。研究结果从车间纵向减振器性能参数方面为消除低轮轨等效锥度所导致的车体低频晃动现象提供了一种有效的应对措施。
Aiming at the issue of low-frequency shake of the carbody caused by the low equivalent conicity of wheel-rail matching after wheel re-profiling of a high-speed train and based on the real train parameters,a fulldegree-of-freedom dynamic model for an eight-unit train consisting of four motored cars and four trailer cars was established,and the accuracy of the train model was verified through the single-vehicle system and the intervehicle suspension system,reproducing the train shaking phenomenon that occurred under the low wheel-rail equivalent conicity.Then an optimization scheme for suppressing the low-frequency lateral vibration of the carbody was proposed in terms of the inter-vehicle longitudinal damper performance parameters,a new inter-vehicle longitudinal damper was designed according to the scheme,and the damper performance test was carried out on it at the same time.Finally,the dynamic stiffness and the dynamic nonlinear damping characteristics obtained from the test were incorporated into the train dynamic model,and the feasibility of the optimization scheme was verified by comparing the lateral ride quality index of each car of the train installed with the newly designed and originally used inter-vehicle longitudinal damper.The results show that the low-frequency lateral vibration of the carbody is coupled by the roll and yaw vibration of the carbody.The low-frequency lateral vibration of the carbody can be effectively suppressed by reducing the dynamic stiffness of the inter-vehicle longitudinal damper or increasing its damping coefficient.The newly designed inter-vehicle longitudinal damper has lower dynamic stiffness and higher dynamic damping in the low-frequency range,which conforms to the technical requirements presented in the scheme.Compared with the original inter-vehicle longitudinal damper,the train equipped with the optimized inter-vehicle longitudinal damper can not only significantly suppress the lateral vibration of the carbody with the main frequency of 1.11~1.33 Hz in the carbody shaki
作者
赵苍鹏
代亮成
池茂儒
郭兆团
曾鹏程
姜文锴
ZHAO Cangpeng;DAI Liangcheng;CHI Maoru;GUO Zhaotuan;ZENG Pengcheng;JIANG Wenkai(State Key Laboratory of Rail Transit Vehicle System,Southwest Jiaotong University,Chengdu 610031,China)
出处
《铁道科学与工程学报》
EI
CAS
CSCD
北大核心
2024年第10期3956-3968,共13页
Journal of Railway Science and Engineering
基金
国家重点研发计划资助项目(2022YFB4301202)。
关键词
高速列车
低锥度晃车
优化方案
车间纵向减振器性能试验
横向平稳性
high-speed train
carbody shaking caused by low equivalent conicity
optimization scheme
inter-vehicle longitudinal damper performance test
lateral ride quality
