Analysis of Influence of Wheel Eccentricity on Steering Wheel Shimmy

In order to enhance vehicle handling stability and traveling comfort,influence of wheel eccentricity on steering wheel shimmy was discussed based on theoretical analysis and field vehicle test.Regarded level B vehicle as research object,comparison tests of prototype were carried out after analysis of steering wheel shimmy caused by eccentric forces of wheel and unbalance mass.Results show that compared with the dynamic balance adjustment of wheel,the bushing adjustment of swing-arm has more effect on steering wheel shimmy,but both of them can't obviously cut down vibrational acceleration amplitude.Wheel eccentricity adjustment has significant influence on steering wheel shimmy.Vibrational acceleration amplitude cuts down around 2 times after wheel eccentricity adjustment.Compared with unbalance mass,eccentricity of wheel has more contribution on steering wheel shimmy and the steering wheel shimmy is improved by controlling wheel eccentricity.