摘要
通过理论分析建立后轮瞬态随动转向系统数学模型,分析得出摆臂旋转角度及摆臂与车身连接衬套刚度是影响随动转向的主要因素;为验证理论模型的正确性,用ADAMS软件建立包含后轮随动转向特性的FSAE整车模型,后轮随动悬架模型设计为扭力梁悬架,衬套刚度通过动静刚度试验机获取,柔性扭转梁通过ABAQUS输出模态中性文件获取;反向车轮激振仿真表明:左右车轮中心可以获取随动转向位移,与理论数模模型对比,误差仅为1.7%;整车弯道仿真表明:车辆入弯时为过渡转向,出弯时为不足转向,整车兼顾平顺与操稳性;扭力梁安装位置C值变动时,随着C值的增加,不足转向特性趋势减小,整车稳定性便能变差;衬套安装角度θ增加时不足转向特性趋势减小,整车稳定性能提升。
Base on the theoretical analysis,the mathematical model of the system is established.According to the modeling,it analyzed the main factors of the follow-up steering that the rotation Angle of the swing arm and the rigidity of the link bush between the swing arm and the body.In order to verify the correctness of the theoretical model,the FSAE vehicle model including the rear-wheel follow-up steering characteristics was established with ADAMS software.The model adopted a torsion beam suspension,the sleeve stiffness was obtained by the static and dynamic stiffness testing machine,and the flexible torsion beam come from the ABAQUS output modal neutral file.The vibration experiment of reverse wheel shows that the following steering displacement can be obtained from left and right wheel center,Compared with the theoretical digital model,the error is only 1.7%;The simulation results show that the turning of the vehicle is transition steering when it enters the corner and insufficient steering when it leaves the corner.With the installation position C value of the torsion beam increases,the understeer characteristic tends to decrease,and the stability of the vehicle becomes worse.As the installation Angle of the bush increases,its steering characteristic tends to decrease,improving the stability of the car.
作者
王孝鹏
WANG Xiao-peng(School of Mechanical&Electronic Engineering,Sanming University,Fujiang Sanming365004,China;Engineering Res-earch Center in Fujian Province University for Modern Mechanical Design and Manufacturing Technology,Fujiang Sanming365004,China)
出处
《机械设计与制造》
北大核心
2020年第2期129-133,共5页
Machinery Design & Manufacture
基金
福建省自然科学基金项目（2016J01741）
福建省中青年教师教育科研专项（JAT170529)
