The vibration performance of suspension system affect the vehicle’s stability and riding comfort, which are important indicators to measure the vehicle performance. In this paper, the two degree of freedom vibration model of the front suspension system is established. The vertical acceleration of the body, the dynamic deflection of the suspension and the relative dynamic load of the wheel are used as the response of the vibration analysis. The virtual excitation method is used for the study and analysis under the conditions of different pavement grade, different speed and different non spring load.The research show that the vibration of the electric car is stronger with the deterioration of the pavement grade, the faster the vehicle speed and the increase of the non spring load, the stronger the vibration of the electric vehicle;compared with the road level and speed, the sprung mass has lesser impact on the vibration;the power spectral density is changed significantly within 0 to 5 Hz, and reach the peak within 2 to 3 Hz.
Journal of Qingdao University of Science and Technology:Natutral Science Edition
power spectral density