ZONGYI XING et al: OPTIMIZATION OF VIBRATION DAMPING FOR THE POWER ASSEMBLY SUSPENSION
In this paper, modelling and simulation calculation were carried out on the suspension system of a MPV (MultiPurpose Vehicle) via ADAMS software. Multiple simulation calculations were carried out by revising the model parameters repeatedly, and finally a model consistent with the data of idling vibration experiment was obtained. On the basis of the revised model, a mathematical model for the optimization design of vibration damping for the power suspension system of MPV was built, with the inherent frequency constraints of the suspension system, the vibration displacements and the turning angle constraints of the power assembly system along X axle and Y axle as the constraint conditions, the rigidities of the suspension components in the 3 main directions as well as the installation angles of the left and right front suspensions of the engine as the design variables, the 6degree of freedom decoupling of the suspension system as the objective function. The optimization design of vibration damping for the suspension system of the engine was completed by means of ant colony algorithm. Simulation analysis was carried out on the dynamic response of the optimized model in terms of time domain and frequency domain, and relevant data and curves were obtained. The simulation results show that the optimized model can control the highest order inherent frequency of the suspension system within the range required by the design, and can make the decoupling rate along Z axle and axle reach over 90% Meanwhile, the transmissibility of the optimized suspension system was calculated, which concludes that the optimized transmissibility is reduced. The results before and after the optimization indicate that the optimized suspension system has good vibration damping effect.