<p>Particle damping can provide substantial damping, regardless of external harsh conditions. The numerical analysis of particle dampers is usually based on the Discrete Element Method (DEM), which is a&nbsp;highly-costly numerical method.&nbsp;To facilitate future studies and faster analyses with that&nbsp;method, a&nbsp;GPU penalty-based DEM solver for particle dampers with spherical particles, called PMB, is described and validated.&nbsp;PMB is an explicit integration GPU particle code considering only uniform diameter spherical particles with a simple contact model.&nbsp;Case studies are analyzed with PMB and other available DEM software programs: the results showed that, beside the use of a consumer GPU, the used modeling approach leads to execution times lower than an order of magnitude when thousands of particles are analysed. To enable the analysis of particle dampers on deformable structures or multibody systems, PMB is coupled with MBDyn, which is a free general purpose multibody dynamics analysis software of widespread use.&nbsp;The coupling algorithm is validated both with a well-known experiment from literature and with new in-house experiments carried out by controlling the measured acceleration RMS amplitude of the particle damper. The validation of the in-house experiment required the development of an amplitude RMS control technique that adjust the sinusoidal input amplitude iteratively.</p>

A Simple Discrete Element Code for Particle Dampers

Paper Proceedings: https://asmedigitalcollection.asme.org/IDETC-CIE/IDETC-CIE2021/volume/85369

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