Vehicle Rigid-Flexible Coupling Dynamics Model and Ride Comfort Optimization

In order to investigate the influence of elastic deformation of the vehicle body on its ride comfort,a rigid-flexible coupling model of the vehicle in ADAMS/Car module was established.Then a simulation test was conducted according to the relevant test regulations to evaluate its ride comfort under random road input,and an actual vehicle road test was made to verify the accuracy and rationality of the model.The verified rigid-flexible coupling model and the design technique of the experiment were used to optimize the spring stiffness coefficient of the suspension and the damping coefficient of the shock absorber.The weighted acceleration root mean square value of vertical vibration at center of mass of the vehicle body decreased by 12.6% after optimization,indicating that a reasonable match of suspension system parameters can significantly improve the vehicle ride comfort.