关键词: 振动与波, 多轴汽车, 悬挂质量, 振动响应, 仿真

Abstract:

In order to predict efficiently the vibration response characteristics of sprung mass at different locations on multi-axle vehicle under the speed input of road roughness, a 7-DOF dynamics simulation model was established according to multi-body dynamics principle in ANSYS. According to the vehicle engine test with the preset rotary speed, and the theoretical analysis, simulation of the vehicle was made with the established model. It shows that the results of simulation well agreed with the test, therefore, the proposed dynamics model and method has high reliability. Simulation results show that the vibration response characteristics of sprung mass at -6m~-4m is mainly influenced by the first natural frequency and -2m~4m is mainly affected by the second natural frequency under the speed input of road surface roughness, especially at the rear of sprung mass; the second natural frequency is the most important factor that impacts the acceleration vibration response characteristics of multi-axle vehicle, therefore, study should be focused on the 3rd and 4th axle suspension systems to improve its ride comfort.