爆胎车辆转向系统与垂直载荷瞬态响应特征  

Steering System and Vertical Load Dynamic Response of Vehicle with Tire Burst

作　　者：陈东[1] 武楠[1] 石能芳 

机构地区：[1]华南理工大学机械与汽车工程学院,广东广州510640

出　　处：《中国公路学报》2014年第8期112-119,共8页China Journal of Highway and Transport

基　　金：广东省教育部产学研结合计划项目(2010B090400298)

摘　　要：为了降低高速行驶车辆爆胎带来的危险,分析了车辆在直线行驶中,转向轮胎爆胎后驾驶人的反应操作,结合转向系统的力学模型以及爆胎后轮胎的力学特性变化,研究了在轮胎纵向力作用下主销偏距上的转向力矩受力特性。根据整车动力学模型及爆胎轮心在垂直方向的位移突变,建立了爆胎车辆垂直载荷的运动学方程。通过仿真分析得到了各轮胎垂直载荷以及车辆转向系统的瞬态响应。结果表明:驾驶人采取制动减速的方式来控制爆胎车辆的车速,有可能造成转向盘产生瞬时逆转力矩,如驾驶人无法作出即时反应,车辆偏航将不可避免。To reduce the risk of tire burst for high-speed vehicles, a driver＇s instinctive operation was analyzed when the vehicle running in a straight line with the steering tire burs, and combined with the mechanical model of the steering system and the mechanical properties of burst tire, under the tire longitudinal force the steering torque characteristics on kingpin offset were also analyzed. Then according to the vehicle dynamics model and the displacement mutation in the vertical direction of the tire wheel center after tire burst, the kinematics equation of the vertical load of the vehicle after tire burst was established. Through simulation and analysis the dynamics responses of the tire vertical load and the steering system were obtained. The results show that the driver takes braking for deceleration to control the speed after tire burst, which may cause the steering wheel to generate instantaneous reverse torque and if the driver can not react promptly, the vehicle will go off course inevitably.

关 键 词：汽车工程 爆胎 车辆动力学 垂直载荷 转向系统 驾驶人行为 

分 类 号：U461.1[机械工程—车辆工程]