Abstract
The Smoothed Particle Hydrodynamics (SPH) method is used to simulate the dynamics of the underwater explosion within the two-dimensional square metal vessel. The SPH particles well represent detonation gas of an explosive charge, water confined in the vessel, or metal surrounding water as the vessel. The shock wave propagating in water impacts the metal wall and deforms the vessel. Finally, the vessel is ruptured at the corner by the impact of the underwater explosion. Furthermore, the impact passing through the metal wall is simulated and eventually causes the shock propagation in the next room within the vessel. The present simulations clearly demonstrate the advantage of SPH method reproducing the damage of the explosion accident including the coupled fluid-structure interaction.
２次元正方形容器中での水中爆発の数値解析をSmoothed Particle Hydrodynamics (SPH)法を用いて行った。SPH粒子は爆発によるデトネーションガス，容器に満たされた水，金属で出来た容器を良く再現した。水中を伝播する衝撃波は金属容器に衝突し容器を変形させた。そして，最終的には容器の角部が破壊された。さらに，衝撃波が金属壁を通り抜け，容器内を隣の部屋まで伝播する様子も観察された。本数値解析結果は，SPH法が流体-構造連成を含んだ爆発事故の再現に有用であることを示した。
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