Particle dynamics integration to multibody dynamics using graphics processing unit

In this paper, dynamic simulation model which have many sphere particles and MBD (Multi Body Dynamics) entities, i.e., bodies, joints, forces, is built and simulated. Many sphere particles are solved with DEM (Discrete Element Method) and simulated with GPU technology. Fast algorithm is applied to calculate hertzian contact forces between many sphere particles and NVIDIA's CUDA is used to accelerate the calculation. Explicit integration method is applied to solve the many spheres. MBD (Multi Body Dynamics) entities are simulated with recursive formulation. Constraints are reduced by recursive formulation and implicit generalized alpha method is applied to solve dynamic model. Particle Dynamics is integrated to MultiBody Dynamics within commercial software RecurDyn. The interaction forces between many sphere particles and rigid body mesh are calculated and applied to each body to simulate two parts simultaneously. These models are built and simulated; waterfall model, water filled washing machine model and oil filled car model. All models are simulated with NVIDIA's GPU and the results are shown.