粒状体ダンパの大規模シミュレーションのための新しいアルゴリズム

抄録

Particle dampers are enclosures partially filled with granular materials, attached to a primary system with high displacement amplitudes. Due to their effectiveness, simplicity and temperature insensitivity, they have been investigated extensively. The discrete element method (DEM) is often used to simulate the dynamics of particle dampers. Because of the very large number of particles in particles dampers, the main issue is the computational efficiency. Some computational approach which can run faster than the original DEM was proposed. However, the validity of the computational approaches has not yet been considered. In this study, a computational scheme combining the uniform grid with linear lists and the coarse-grain model is presented. The validity of the computational scheme is examined by comparison with experimental results. In addition, the relationship between the coarse grain ratio and the errors of the analysis is investigated.