Frequency-domain simulation and analysis of vehicle ride comfort based on virtual proving ground

Abstract

Vehicle ride comfort is one of the important properties of modern car. This paper takes a practical model for reference section and a virtual model is established based on virtual proving ground (VPG). By calculating and analyzing simulation results, we can comprehensively and accurately evaluate the model, and do further study of different factors impacting on ride comfort. The main researches include: the multi-body dynamics model and random road surface are established based on VPG. The body acceleration time-domain curves and frequency-domain power spectrums are obtained by LS-DYNA. Total weighted acceleration of vehicle ride comfort is evaluated by root-meansquare method. The effects of suspension system, tire pressure and speed on the vehicle ride comfort are analyzed. Simulation results show that the simulation of vehicle ride comfort based on VPG can truly reflect real test condition and the results achieved are accurate and reliable.