Abstract
We developed a new method for the analysis of the dynamic systems of elastic materials which include backlashes by using Moving Particle Semi-implicit (MPS) method. Rigid-elastic interaction model is newly introduced for the effective analysis. We applied the method for the analysis of the concrete cask subjected to seismic motions. The seismic data which was observed in Kobe in 1995 is used in the present study. The rocking angle and displacement of the concrete cask is evaluated by the simulation and compared with those in literature. It is shown that our model can perform the simulations effectively and the results are in good agreement with those of the reference data.