Abstract
In this study, the effect of shape representation in rockfall simulations using DEM was investigated. A model test and it's simulation were performed. In the simulation, differnt numerical models were prepared by changing shape representation to figure out a quantitative relationship between shape representation and calculation accuracy. Every simulations were done in the same condition as experiment, except the shape representation quality of calculation models. Two non-dimensional indexes, namely ESR and OR, were defined to enable quantification of the shape representation quality. Eventually, the relationship between the shape representation quality and the accuracy of DEM simulation were found through comparison of simulated data with experiment. Based on the results obtained in this study, the framework to enable quantitative design of calculation accuracy by controlling shape representation quality was proposed.
