The whole vehicle system dynamics modeling and simulation for transportation vehicle

To design reliably the products transportation simulation experiment system based on multi-body dynamics theory, vibration theory and virtual prototyping, the transportation vehicle subsystem simulation models such as fore and rear suspension, tire, vehicle body and steering are built and the whole vehicle virtual model is assembled, through the application of multi-body dynamics software (ADAMS). According to the description of special transportation pavement and pavements in different grades in the national army standard, the pavement files in different grades accorded with the requirement of the tire model of the software(ADAMS) is compiled by MATLAB. Through loading the random pavement, the comfort simulation for the vehicle is carried out and the obtained vibration spectra is compared with the measured spectra. Through analyzing, there is only a few difference between the RMS of each point obtained from simulation experiment and the RMS of each point obtained from running-in test, which indicates that the simulation experiment results have enough reliability and the “vehicle-road” transportation simulation experiment system can replace the practical vehicle experiment to some extent. So the simulation experimental results provide reference for correlation research.