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车辆非稳态轮胎路面三向作用力差异特性分析

, PP. 112-119

Keywords: 汽车工程,轮胎,作用力分析,动摩擦特性,滑动摩擦,车辆模型,9自由度

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Abstract:

?为从力学角度解析轮胎印迹显隐特性,基于路面分形理论和粗糙路面接触机理,引入结合路面分形和橡胶特性的滑动摩擦因数改进模型,提出了考虑轮胎动摩擦特性的9自由度非稳态车辆模型,分析了车辆非稳态工况下,轮胎和路面对非稳态轮胎作用力差异特性的影响。建立了车载稳定性检测系统并进行实车试验,验证了车辆模型的有效性,应用MATLAB在固定转向角和恒定制动条件下对模型进行了仿真分析。研究结果表明:轮胎和路面性质对轮胎纵向作用力差异特性影响相对较小,对轮胎横向作用力和垂向载荷的差异特性影响显著;轮胎横向作用力和垂向载荷差异特性是产生轮胎印迹显隐特性的一个主要原因。

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