Efficient Discrete Element Modeling of Particle Dampers

Particle dampers’ dissipative characteristics can be difficult to predict because of their highly non-linear behavior. The application such devices in deformable vibrating systems require extensive experimental and numerical analyses; therefore, improving the efficiency when simulating particle dampers would help this regard. Two techniques often proposed speed up simulation, namely adoption a simplified frictional moment reduction contact stiffness, are considered; effect on simulation run-time, ability bed sustain shear deformation, prediction dissipation performance is investigated for different case studies. stiffness studied relation maximum overlap between particles, as well contacts’ duration. These simulations carried out over wide range motion regimes, frequencies, amplitude levels. Experimental results considered well. All performed using GPU-based discrete element tool coupled with multi-body code MBDyn; execution time compared those other solvers.