FSAE赛车两种不等长双横臂独立悬架的运动位移比例仿真与对比  

Comparative Study of Simulation Models for the Motion Ratio of Unequal Length Double Wishbone Suspension of a FSAE Racing Car

作　　者：刘泽[1,2] 张新[1,2] 

机构地区：[1]长沙理工大学汽车与机械工程学院,湖南长沙410114 [2]工程车辆安全性设计与可靠性技术湖南省重点实验室,湖南长沙410114

出　　处：《汽车工程学报》2015年第4期297-303,共7页Chinese Journal of Automotive Engineering

基　　金：2014年湖南省研究生科研创新项目(CX2014B378)

摘　　要：拉杆式与推杆式不等长双横臂独立悬架应用于大多数的FSAE赛车,赛车弹簧运动位移与车轮中心位移比例的大小不仅影响着其弹簧刚度的选取,同时影响着操纵稳定性。分别建立赛车左侧前悬架拉杆式与推杆式机构的物理模型,应用牛顿-辛普森方法进行悬架几何运动分析,并通过运动学仿真分析探索较精确地获得该比例大小的方法,之后对两种机构形式求得的该比例变化趋势进行对比分析,求取它们的等效刚度并得出推杆式可得到更大的等效刚度的结论,为FSAE赛车悬架系统设计提供了有益的建议。The pushrod and pullrod suspension designs with unequal length double wishbone are commonly used in FSAE racing cars. The motion ratio between the spring and the wheel center not only affects the calculation for the spring stiffness, but also affects the handling and stability of the race car. Physical models were built for a pullrod suspension and a pushrod suspension respectively at the left front wheel and the Newton-Raphson method was used to analyze the kinematics of suspension geometry. And a more accurate method of estimating the motion ratio was proposed by using kinematics simulation analysis. The motion ratio curves and the effective stiffness were compared for the pullrod and pushrod designs. It is concluded that the pushrod suspension has greater effective stiffness. The paper provides some useful suggestions for the suspension system design.

关 键 词：FSAE赛车 不等长双横臂独立悬架 仿真与对比 运动位移比例 

分 类 号：U462.1[机械工程—车辆工程]