Abstract: In order to improve the efficiency of product simulation modeling and enhance the reusability of simulation model, a method for building kinematic model of virtual prototype of mechanical product is proposed. Simulation component is used to express the design knowledge of product structure, which describes various information in the structure related to kinematics. The mutual mapping relation between key design parameters and product CAD model design information is established. The kinematic simulation model of quick reuse mechanism is realized through modifying the key parameters. Numerical algorithm is used to carry out analysis and solution of the model, then various kinematic behavior data of parts and components in the product structure are obtained, and kinematic simulation is carry out in virtual environment to exhibit its kinematics behavior. The method is applied in performance assessment of mechanical products, and it is verified by using the steering and suspension systems of a certain type of motor car. Simulation examples show that the method has good practicability and expandability.

Key words: Digital mockup, Kinematic simulation, Model reused, Simulation component