计入温度效应与转向传动机构间隙的车辆摆振特性分析  

Analysis of shimmy characteristic based on temperature effects and steering linkage clearance for vehicle

作　　者：卢剑伟[1] 徐燚[1] 王锡锌[1] Stephanos Theodossiades 

机构地区：[1]合肥工业大学机械与汽车工程学院,合肥230009 [2]拉夫堡大学Wolfson机械与制造工程学院

出　　处：《农业工程学报》2013年第14期74-81,共8页Transactions of the Chinese Society of Agricultural Engineering

基　　金：国家自然科学基金(50975071);教育部新世纪优秀人才支持计划(NCET-10-0358);常州市应用基础研究计划项目(CJ20110006)

摘　　要：为改善车辆不同作业环境下的操控性能,防止地域及季节气温差异导致转向系动态响应偏离其设计初衷,该文以非独立悬架车辆为例,对考虑温度效应的车辆摆振系统动力学行为进行了分析。基于热弹性力学考察了温度效应对转动副间隙的影响,建立了计入温度效应的转向传动机构含间隙车辆摆振系统动力学模型。通过数值算例分析了某1030货车摆振响应的分岔特性和初值特性,讨论了车速、温度等参数对摆振系统全局动力学行为的影响,研究表明,温度的改变在85～110km/h车速区间内会导致转向轮摆角周期运动形态的改变,且这种影响在高车速区段下比中低车速区段更为明显,而当车速为100km/h、温度为-40℃时左转向轮摆角中值为负,意味着有向右跑偏趋势;50℃时摆角中值由负变正,说明有改为向左跑偏的趋势。研究结果可为全天候车辆防摆振设计提供参考。Vehicles work in outdoor environments to deliver goods or people, while the ambient temperature varies in different seasons or different regions. Since the process parameters of the kinetic pair in vehicle steering mechanisms are usually designed based on the domestic temperature of 20℃, the temperature variation usually leads to mechanical deformation of components of kinetic pairs in vehicle steering mechanisms, and as a result, the deformation of the components may change the kinetic and dynamic characters of the kinetic pair. Consequently, the dynamic response of the steering system may vary if the vehicle is exposed to different temperature working conditions. As a result, the dynamic behavior of the vehicle shimmy system may be influenced by the temperature effect. Actually, some cases have been reported that the dynamic response of the steering system of certain vehicles varied in different seasons or in different regions. To evaluate the influence of temperature effects on the dynamic response of the vehicle shimmy system with clearance in the steering mechanism, and to prevent the potential deviation of the dynamic response of the steering system from its original design goal, the dynamic behavior of the vehicle shimmy system with clearance in steering linkage with consideration of temperature effect is discussed. Based on thermal elasticity, thermal deformation of kinetic pair components is calculated, and the influence of temperature effects on clearance of revolute kinetic pair was analyzed. As a result, interaction forces between the kinetic pair components with consideration of temperature effect is re-evaluated, and the sub dynamic model of the kinetic pair with clearance with consideration of temperature effect is available. Consequently, a vehicle with dependent suspension was employed as an example, and the dynamic model of the vehicle shimmy system with clearance in steering linkage with consideration of temperature effect is presented. Based on this model, the dynamic behavior of the vehicle

关 键 词：车辆 温度效应 动力学 间隙 摆振 

分 类 号：TH132[机械工程—机械制造及自动化]