Abstract: Currently，the research on dynamic characteristics of motorcycle system usually adopts multi-rigid-body dynamic method without considering the influence of flexibility of motorcycle frame，human and road on the dynamic characteristics of motorcycle，which leads to the great difference between the analysis result and the reality. A new dynamic model of motorcycle is established by taking into account the flexibility of the motorcycle frame. Dynamic characteristics of the established system are studied through simulating the system under different driving conditions including acceleration, braking, and turning, and subjected to two types of road excitations including the State Grade B road and the bumper. Furthermore, the simulation results are validated through experiments. It has significance in the design and development of motorcycle and further optimization of its dynamic characteristics.

Key words: Driver-motorcycle-road system, Dynamic, Finite element method, Motorcycle, Rigid-flexible coupling