The Vibration Attenuation Characteristic Analysis Of Powertrain Mounting System Based On A Vechile

Along with the advance of human society and the technology development ofautomobile industry,the request of the comformance is more and more high.And thevibration and noise performance have been the important standard to measure whether thevehicle is good or not.The mount system of automobile power is one important system ofthe vibrating system.It has much influence in improving automobile smoothness anddecrease noise.Proper design of automotive powertrain would greatly reduce the vibrationof automotive powertrain and body.This paper aiming at the vibration problem of a hybrid electric bus under engineidling condition,a vibration-attenuation characteristic analysis of the original mountingsystem is carried out.First of all,measure all parameters of the powertrain mounting systemthrough the test, to be prepared for modeling the powertrain mountingsystem.Secondly,measure and analyse the vibration of each suspension of powertrainmounting system under different rotating speeds in idle condition through the test,to beprepared for comparing with simulation behind.Again,according to the size parameters ofthe frame and the floor,model the frame and the floor with CATIA software,and thenimport the model into the ADAMS software.Based on this,model the suspension andtires,finally the vehicle model with13degrees of freedom is completed.Then verify theaccuracy of the model,and simulate the vibration of the suspensions of the vehiclemodel.And based on the model, the vibration attenuation performance of the model issimulated under the idle speed condition both in time domain and in frequencydomain.Compare the simulation results with the test data,to verify the accuracy ofsimulation.