汽车气动造型在侧风稳定性中的应用研究  

Research on Impact of Vehicle Aerodynamic Models on Cross-wind Stability

作　　者：谷正气[1] 赵荣远[1] 杨易[1] 龚旭[1] 吕征[1] 吴彤峰[2] 张洪涛[2] 

机构地区：[1]湖南大学汽车车身先进设计制造国家重点实验室,湖南长沙410082 [2]广西工学院汽车工程系,广西柳州545006

出　　处：《湖南大学学报（自然科学版）》2008年第9期44-47,共4页Journal of Hunan University:Natural Sciences

基　　金：国家“863”科技计划资助项目(2007AA04Z122);湖南省重点科技计划资助项目(06FJ2001)

摘　　要：对比不同气动造型汽车的侧风稳定性,分析了影响侧风稳定性的因素.采用MATLAB软件建立多自由度汽车动力学数学模型,并进行侧风稳定性仿真,通过对比风压中心与质心3种相对位置情况下的侧倾角速度和横摆角速度,得出风压中心位于质心后的汽车气动造型可以改善汽车侧风稳定性的结论.采用实车侧风稳定性试验进一步验证了侧风稳定性虚拟试验结论的有效性.最后从汽车的车身尾翼、车身横断面、阻风板等方面提出汽车侧风稳定性改善措施.Through the comparative study of the automobile cross-wind stability of different aerodynamic formations, the influencing factors were analyzed. The mathematical model was developed and the cross-wind stability simulation was carried out in the MATLAB software. After analyzing the roll angular velocity and the yaw rate in three relative locations of the pressure center and the mass center, it has been found out that automobile cross-wind stability is the best when the pressure center is behind the mass center. For further verification of the validity of this method, a rear automobile crosswind stability test has been conducted. Finally, improvement measures have been presented in the empennage and the cross section of the automobile body.

关 键 词：空气动力学 侧风稳定性 气动造型 仿真 

分 类 号：U461.1[机械工程—车辆工程]