机车传动系统扭转与轮对纵向耦合振动稳定性.pdf

第9 卷　第1 期 交 通 运 输 工 程 学 报 Vol.9　No.1 2009 年2 月 Journal of T raffic and Transportation Engineering Feb.2009 :1671-1637(2009)01-0017-0 姚　远,张红军, 罗　赟,金鼎昌 ( , 　610031) 　:为研究机车打滑时 动系统扭转与轮对纵向耦合运动作用下 动系统的稳定性,建立了机 车单轮对 动系统动力学模型,考虑了轮对回转与纵向振动自由度, 对非线性系统微分方程在平衡 点附近线性化, 并根据线性化系统在状态空间中的特征值判断系统的稳定性, 绘制了振动系统临界 稳定曲线。分析结果表明:由于轮轨粘着系数的负斜率, 动系统的扭转振动与轮对的纵向振动为 不稳定的自激振动, 两者与轮对运行速度和轴重有关, 速度越大,轴重越小,振动越稳定, 因此, 动 系统的扭转与轮对的纵向阻尼能很好抑制这种自激振动。 :机车 动系统;扭转振动;纵向振动;稳定性分析 :U260.111　　　:A Torsional-longitudinal coupling vibration stability of drive system for locomotive YAO Yuan, ZHANG Hong-jun, LUO Yun, JIN Ding-chang (Traction Pow er S tate Key Laboratory, Southw est Jiaotong University, Chengdu 610031, Sichuan, China) Abstract:In order to investigate the stability of drive system under torsional-longitudinal coupling vibration for locomotive in slippage process, a dynamics model of drive system with single wheelset w as set up, the torsional and longitudinal vibration freedoms of the w heelset were taken into account.The nonlinear differential equations of drive system vibration were linearized at the balance point, and its eigenvalues were calculated to judge the stability of the system, w hose critical vibration curves were gained.Analysis result show s that the torsional vibration of drive system and the longitudinal vibration of w heelset are self-excited vibrations because of the negative slope of adhesion curve betw een wheel and rail, and their stabilities depend on w heelsets speed and axle load.The higher the velocity is and the lower the axle load is, the stabler the vibrations are.So the damps of torsional and longitudinal vibrations are able to suppress the unstable vibrations.1 tab, 5 figs, 8 refs. Key words:drive syste