车辆斜碰撞系统的非线性特性研究  

Study on the Nonlinear Characteristics of Vehicle Oblique-Impact Vibration

作　　者：韩宁 李万祥[1] 李雄兵 雷菲菲 HAN Ning;LI Wan-xiang;LI Xiong-bing;LEI Fei-fei(School of Mechanical and Electrical Engineering,Lanzhou Jiaotong University,Lanzhou Gansu 730070,China;Tianshui Normal University,Tianshui Gansu 741000,China)

机构地区：[1]兰州交通大学机电工程学院,甘肃兰州730070 [2]天水师范学院,甘肃天水741000

出　　处：《机械研究与应用》2022年第6期76-80,共5页Mechanical Research & Application

摘　　要：将车辆追尾工况抽象为多自由度斜碰撞振动系统,推导了系统的半解析解,建立了Poincaré映射,基于一定参数使用Runge-Kutta法进行数值仿真,借助相图、Poincaré映射图、时间历程图,分析了倍化分岔、hopf分岔、擦边分岔和阵发混沌等非线性行为。通过计算减振器质量参数与频率的关系曲线发现,配备较小质量的减振器在较低频率时相对稳定,中高频率时稳定性与减振器质量不构成同步关系,这对车辆减振器的选择具有指导意义。In this paper, vehicle rear-end collision is abstracted as a multi-degree of freedom oblique collision vibration system. The semi-analytical solution of the system is derived, and the Poincaré mapping is established;based on certain parameters, the Runge-Kutta method is used for numerical simulation;and the nonlinear behaviors of doubling bifurcation, hopf bifurcation, edge bifurcation and array chaos are analyzed with the help of phase diagram, Poincaré mapping diagram and time history diagram. By calculating the relation curve between the quality parameters of the shock absorber and the frequency, it is found that the shock absorber with a smaller mass is relatively stable at a lower frequency, and the stability does not form a synchronous relationship with the quality of the shock absorber at a middle or high frequency, which has guiding significance for the selection of the vehicle shock absorber.

关 键 词：车辆碰撞 斜碰 周期运动 分岔 混沌 POINCARÉ映射 

分 类 号：U467.14[机械工程—车辆工程]