一类非连续阻尼力分段线性系统的分岔研究

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基金项目: 非线性和时滞因素作用下汽车悬架动力学性能分析与控制

Bifurcation research for piecewise linear system involved in discontinuous damping force

1.
School of Traffic and Vehicle Engineering, Shandong University of Technology, Zibo 255049, China
2.
State Key Laboratory of Structureal Analysis for Industrial Equipment, Department of Engineering Mechanics, Dalian University of Technology, Dalian 116024, China

摘要: 以某货车的主副钢板弹簧后悬架系统为模型, 建立了一类两自由度具有非连续阻尼力分段线性系统的微分方程. 建立Poincaré映射, 推导了系统在各分界面处的跳跃矩阵, 经分析得知跳跃矩阵与系统的弹簧刚度无关, 只与阻尼力有关. 通过数值方法进一步揭示了系统发生的Neimark-Sacker分岔现象. 分析了在单边横截穿越情况下阻尼系数对系统稳定性的影响. 对该类碰撞系统分岔和混沌的研究, 有助于工程中此类弹性碰撞系统的优化设计.
- 分岔
Abstract: Based on some truck suspension model consisting of primary and subsidiary spring, a two-degree-of-freedom system with piecewise-Based on truck suspension model consisting of primary andsubsidiary springs, a two-degree-of-freedom system with piecewise-linearityinvolved in discontinuous damping force is established The stroboscopicPoincaré map is established, and the saltation matrix is deduced byzero-time discontinuity mapping method at the interface. The resultindicates that the saltation matrix is independent on spring rate, but isnot independent on damping force. The Neimark-Sacker bifurcation point isinvestigated by the numerical calculation. The research on bifurcation andchaos can contribute to optimizing design in impacting systems.
- bifurcation