Abstract：To investigate the correlation between the characteristics of suspension and full vehicle and design parameters of twist beam suspension, the influence factors on twist beam suspension characteristics were analyzed. A rigidflex model of twist beam suspension was built to discuss the influences of position, orientation and torsion stiffness of cross section on the suspension K&C characteristics. The nonlinear relationship between K&C characteristics and above parameters were obtained by simulation.The extreme value of suspension characteristics index and significance of influence design parameters on suspension characteristics index were summarized. The relationship between orientation of cross section and suspension roll center, wheel load transfer, sideslip angle was explicitly explained based on the vehicle double track movement model. In full design space, the nonlinear relationship curves among steady, transient handling index and orientation angle of cross section were obtained.The results show that the optimal steady and transient characteristics of vehicle are achieved at about 75° downward angle of cross section.
2014, Vol. 35 
