Simulation And Optimization Of Ride Comfort With Multi-Axle Vehicle Model Established With ADAMS

The use of multi axle vehicles is increasingly widespread, but the research on the performance of multi axle vehicles is not systematic and comprehensive. Ride comfort is one of the important indexes for evaluating vehicle performance, so it is necessary to study the ride comfort of multi axle vehicles. In this paper, the ride comfort of a all-wheel-drive heavy vehicle is studied, and the influence of the stiffness damping combination on the ride comfort of the rear suspension is discussed. At the same time, the paper explores a new method of reserarching the ride comfort of multi axle vehicle using the vibration head test bench, avoiding the mutual interference between the pavement, which is helpful to provide help and guidance for multi axis vehicle ride comfort research and selecting the vehicle design parameters.In this paper, we point out the key points of modeling with the ADAMS/Car module by the detailed introduction of the multi-body dynamics software ADAMS. Vehicle virtua l prototype model is established according to the information on the mass and structure of vehicle, and key explanation of six excitation head test platform is made.The paper elaborated how to start and operate ADAMS/Car through establishing personal site. The simulat io n model of vehicle is assembled. Then exploring the law of effect of different stiffne ss combination on the ride comfort of multi axle with the vehicle ride comfort index of mass center of vehicle. The law of effect of different damping combination on the ride comfort of multi axle is explored with the vehicle ride comfort index of mass center of vehicle.based on the best stiffness combination.Analysis results show that when the stiffness of two axle of three-axle- vehicle are the same with the other axle stiffness changing, the vehicle ride comfort is better under the combination of front and middle axle having the same stiffness and rear axle stiffness is less than the first two axes; when the three axle stiffness can change arbitrarily, the vehicle ride comfort is the best with front, middle and rear axle stiffness decreasing in turn. When the damping of two axle of three-axle- vehicle are the same with the other axle damping changing, the vehicle ride comfort is better under the combination of middle and rear axle having the same damping and front axle damping is bigger than the last two axes; when the three axle damping can change arbitrarily, the vehicle ride comfort is the best with front, middle and rear axle damping decreasing in turn.The research methods and conclusions of this paper have some guidance for the modeling, design and analysis of multi axle heavy vehicles.