Data-driven model order reduction for granular media

@article{Wallin2021DatadrivenMO,
  title={Data-driven model order reduction for granular media},
  author={Erik Wallin and Martin Servin},
  journal={Computational Particle Mechanics},
  year={2021},
  volume={9},
  pages={15-28}
}
We investigate the use of reduced-order modelling to run discrete element simulations at higher speeds. Taking a data-driven approach, we run many offline simulations in advance and train a model to predict the velocity field from the mass distribution and system control signals. Rapid model inference of particle velocities replaces the intense process of computing contact forces and velocity updates. In coupled DEM and multibody system simulation, the predictor model can be trained to output… 
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