Introducing Metamodel-Based Global Calibration of Material-Specific Simulation Parameters for Discrete Element Method

An important prerequisite for the generation of realistic material behavior with Discrete Element Method (DEM) is correct determination material-specific simulation parameters. Usually, this done in a process called calibration. One main disadvantage classical calibration fact that it non-learning approach. This means knowledge about functional relationship between parameters and responses does not evolve over time, number necessary simulations per sequence respectively investigated stays same. To overcome these shortcomings, new method Metamodel-based Global Calibration (MBGC) introduced. Instead performing expensive runs taking several minutes to hours MBGC uses metamodel which can be computed fractions second search an optimal parameter set. The was trained data from hundred able predict dependence given set very high accuracy. ensure usability wide variety bulk materials, variance particle size distributions (PSD) included via parametric PSD-functions, whose serve as additional input values metamodel.