沖縄県固有土壌の動特性評価と土中爆発問題の数値シミュレーション

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  • Numerical simulation for underground explosion problem and dynamic characteristics of Okinawa's unique soil

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<p>In this paper, dynamic characteristics of Shimajiri Mahji that is a unique soil to Okinawa's main island, were clarified by visualization experiments with ultrahigh-speed camera on the plane wave generated by detonation and the interaction field at the target soil interface. Next, numerical simulation of the detonation experiment using commercial finite element analysis software was carried out and the validity of the soil dynamic characteristics clarified from the experiment was confirmed. Furthermore, in order to clarify the fragment behavior when explosive the unexploded bombs, we have constructed the simple numerical simulation models for soil surface and underground explosion problems by SPH scheme. From the series of computational results, we have confirmed the fragment behaviors is significantly dependent on the explosive amounts and the depth buried of unexploded bomb.</p>

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