半挂汽车列车操纵特性与横向稳定性的研究  

A Study on the Handling Characteristics and Lateral Stability of Tractor-semitrailer Combination

作　　者：杨秀建[1] 李西涛[1] 

机构地区：[1]昆明理工大学交通工程学院,昆明650500

出　　处：《汽车工程》2012年第12期1107-1113,共7页Automotive Engineering

基　　金：国家自然科学基金项目(51005109);云南省应用基础研究面上项目(2010ZC029)资助

摘　　要：采用牵引车和半挂车的不足转向梯度独立定义的方式对半挂汽车列车的操稳性进行了研究,分析了车辆的结构参数对不足转向梯度的影响。应用动态系统的稳定性理论,探讨了"折叠"和"横向摆振"失稳与其操纵特性间的关系。结果表明,与两轴单体汽车只会发生单调分歧失稳相比,半挂汽车列车还会发生"横向摆振"失稳,具体的失稳形式与牵引车和半挂车的不足转向梯度以及车辆结构参数密切相关。The handling and stability of tractor-semitrailer combination are studied with the separate definition of understeer gradient for tractor and semitrailer, and the effects of structural parameters on the understeer gradients of the combination are analyzed. By applying the stability theory of dynamic system, the relationships between instabilities like ＂jackknife＂ and ＂lateral sway＂ and handling characteristics are investigated. The results indicate that different from two-axle single vehicle, in which only monotonous bifurcation instability may happen, beside that ＂lateral sway＂ may also take place in tractor-semitrailer combination, and its specific pattern of instability is closely related to the understeer gradient and structural parameters of tractor-semitrailer combination.

关 键 词：半挂汽车列车 汽车动力学 操纵稳定性 不足转向梯度 

分 类 号：U469.5[机械工程—车辆工程]