摘要
运用非线性分叉理论,对半主动高速列车的蛇行运动稳定性开展了全面研究。建立高速列车模型、半主动减振器模型、半主动控制器模型,并在此基础上构建半主动高速列车联合仿真模型系统。详细分析高速列车动力学系统中影响稳定性的主要非线性特征:轮轨接触几何非线性和抗蛇行减振器非线性。利用演算法计算不同非线性特征组合下的高速列车在采用被动悬挂和采用半主动悬挂系统时的蛇行运动分叉特征,并与线路试验进行对比。结果显示,半主动悬挂系统对采用阻尼型抗蛇行减振器并匹配以大锥度踏面的车辆的稳定性影响不大。半主动悬挂会使采用摩擦型抗蛇行减振器匹配以小锥度踏面的车辆的稳定性有所降低但不影响正常使用。半主动悬挂会使采用摩擦型抗蛇行减振器匹配以磨耗状态的小锥度踏面的稳定性显著下降。因此在高速列车设计中应根据车辆悬挂系统特点,谨慎选用半主动悬挂,在服役过程中亦应关注轮轨关系的变化对半主动悬挂车辆稳定性的影响。
The stability of the high-speed train（HST） with semi-active suspension is studied comprehensive using the nonlinear bifurcation theory. The high-speed train model, semi-active damper model and the semi-active controller model are set up. Using those models, the co-simulation model system of the semi-active high-speed train is built. The nonlinearities of the wheel/rail contact and the yaw damper are analyzed. The hunting bifurcation graph of the high-speed train with the semi-active is calculated using the brute-force method. The influence of the semi-active suspension on the stability of the HST which equipped the damping type yaw damper and the high conicity thread is less. It reduces the critical speed of the HST about 15 km/h, which equipped the friction type yaw damper and the high conicity thread. However, if the HST equipped the friction type yaw damper and the worn low conicity tread, the semi-active suspension would worsen dramatically the stability. The semi-active suspension should be chosen carefully as designing the HST suspension system, when the low conicity thread and friction type yaw damper have been adopted. The influence of the wear of tread on the stability semi-active suspension HST should be concerned in the process of service.
出处
《机械工程学报》
EI
CAS
CSCD
北大核心
2015年第4期116-125,共10页
Journal of Mechanical Engineering
基金
国家重点基础研究发展计划资助项目(973计划
2011CB711106)
