| With the improved condition of highway and the increase of vehicle speed, it is on rising for the high driving speed performance of vehicle caused by that. One kind of vehicle has steering wheel shimmy at high speed, while the traditional classical dynamic method can't satisfy the requirement of complex vehicle system modeling and precise solution.This research bases on Multi-Body Dynamic theory and FEA, applies software ADAMS, ANSYS and UG to built the Multi-Body dynamic and kinetic model of front suspension system.optimized the coordinate coefficients of front wheels, finished the structure design of key components of front suspension. With the simulation calculation of dynamic model, it indicates the extra eccentric mass of wheel is the main reason for shimmy. Bases on different simplify of the stabilizer, the rigid dynamic model, discrete dynamic model and mode integrated model of the front suspension and steering system are built. The effects to the analysis result of the three models are compared. The research calculates the varied law of steering wheel shimmy with the vehicle speed, the inherence characteristic and force vibration response of the front suspension and steering system in different stabilizer diameters, discusses the restrain capability of vary the stabilizer diameter to shimmy.Utilize the method and theory in this research, it overcomes the problem of the traditional classical dynamic method can't handle the complex vehicle system modeling and solution. Greatly improve the solution precise, it has important theoretic value. Furthermore through this research it optimizes the design of front wheels' coordinate coefficients and finds the principle reason of the shimmy, guides the manufacturer's improvements. So this study has great realistic significance and value too. |
