Rigid-Flexible Coupling Study on Ride Comfort of Car with Flexible Suspension

Nowadays,most researches on vehicle ride comfort are only based on the multi-rigid body dynamics method,but not considering the affection of the flexible suspension components. These lead to the result being some differences with the actual?value. In order to improve the simulation precision of the model,based on multi-body system dynamics,combining the finite element and modal synthesis methods,a rigid-flexible coupling vehicle model including the flexibility of lower arms,stabilizer bar and torsion beam is established. The B-level test road is established. The simulation on the ride comfort is carried out. The research result shows the root-mean-square value of seat acceleration reduces compared with rigid model.The research result also shows that the differences between rigid body model and rigid-flexible coupling model rise with velocity. It's necessary to establish the rigid-flexible coupling suspension whole when study the ride comfort.