628 AMRを用いた衝撃波による構造物飛散の数値シミュレーション(S09 直交適合格子による計算手法)

抄録

The fragmentation of the structure by explosions is one of crucial problems for safety studies, and well known to be a very difficult subject. The interaction between the blast wave and the probabilistic destruction of the structure has to be solved. The strong pressure of the shock wave makes the structure broken into a lot of small fragments. In the numerical simulation, fine resolution is required locally and moves with the fragmentation process. We have developed a higher-order AMR (IDO-AMR) based on IDO (Interpolated Differential Operator) scheme. We apply our scheme to the fragmentation of the structure driven by a blast wave. The fine resolution is controlled not only for the shock wave but also for the area around small fragments to account for the detail interactions. The destruction of the structure is described by the Extended Distinct Element Method. In this paper, the destruction of a simple-structured material will be presented.