摘要
针对磁流变阻尼器动态建模中存在的模型复杂、拟合精度差、计算速度慢等问题,文中提出一种改进型“速度分级多项式模型”。该模型在传统多项式模型的基础上加入两个速度切换点,在不同速度段分别采用不同函数进行拟合,从而在保证模型拟合精度的同时,有效避免了Runge振荡现象,也适当提高了计算速度。以RD-8040-1型号阻尼器为对象,对其进行特性测试和模型参数辨识。将该模型替换CRH3高速动车组二系横向减振器,采用开关天棚阻尼控制策略实现高速动车组二系悬挂的横向半主动控制整车动力学仿真,仿真模型中考虑到磁流变阻尼器卸荷、响应时滞等实际特性。结果表明,基于磁流变阻尼器的二系悬挂半主动控制能有效抑制高速列车的横向振动,与被动悬挂相比,在速度300 km/h直线运行工况下,车体横向加速度幅值谱最大幅值和加速度均方根值分别下降38.1%和37.6%。
To solve the problems of complex identification model,poor fitting accuracy and slow calculation speed of magnetorheological dampers dynamic modeling,this paper proposes an improved"velocity graded polynomial model".The model adds two velocity switching points to the traditional polynomial model and uses different functions for fitting in different velocity segments,thus effectively avoiding the Runge Oscillation Phenomenon while ensuring the model fitting accuracy,and also appropriately improving the calculation speed.The LORD RD-8040-1 damper is used as the test object,its characteristics are tested and the model parameters are identified.The model is used to replace the secondary lateral dampers of CRH3 high-speed EMU,and the switching Sky-Hook control strategy is used to realize the simulation of lateral semi-active control of the whole vehicle dynamics of the high-speed EMU secondary suspension,the simulation model takes into account the magnetorheological damper unloading and response time delay.The results show that the semi-active control of the secondary suspension based on magnetorheological dampers can effectively suppress the lateral vibration of high-speed trains.Compared to the passive suspension,the maximum value of the car body lateral acceleration amplitude spectrum and the root-mean-square value of lateral acceleration of the car body are reduced by 38.1%and 37.6%,respectively,under the operating condition of straight-line operation at 300 km/h.
作者
张祥光
程俊
吴国颂
钟晓波
姚远
ZHANG Xiangguang;CHENG Jun;WU Guosong;ZHONG Xiaobo;YAO Yuan(State Key Laboratory of Rail Transit Vehicle System,Southwest Jiaotong University,Chengdu 610031 Sichuan,China;Bogie R&D Department,CRRC Zhuzhou Locomotive Co.,Ltd.,Zhuzhou 412001 Hunan,China)
出处
《铁道机车车辆》
北大核心
2024年第3期63-71,共9页
Railway Locomotive & Car
基金
国家自然科学基金(51735012)
中国国家铁路集团有限公司科研开发计划课题(N2020J026,N2021J028)
牵引动力国家重点实验室自主研究课题(2022TPL-T02)。
关键词
高速列车
磁流变阻尼器
半主动控制
多项式模型
时滞
High-speed trains
magnetorheological dampers
semi-active control
polynomial model
time delay
