No.560 水中爆発ガスバブルの脈動と浮上挙動の解析 / Pulsation and Surfacing behavior of a gas bubble generated by an underwater explosion with LS-DYNA

水中爆発による爆発生成ガス球の脈動と浮上挙動をLS-DYNAのALE法で解析した例を示します。ガスバブルの脈動に伴い水面も脈動しスプラッシュが発生する様子を表現することに成功しました。

参考文献:米田尚弘, 岩田節雄, 谷川雅之, Sherif M.H. Rashed, 河原 充 :三次元水中衝撃波と浮体構造物の衝撃応答シミュレーション, 日本造船学会論文集, 1994巻(1994)175号

なお,本事例はサンプルであることをご了承下さい。

Keywords: Underwater explosion, gas bubble, surfacing, pulsation, ALE method

Tools: LS-PrePost ver.4.9, LS-DYNA MPP Win64 R13.1.1

August 22, 2023 create a new entry

 Pulsation and surfacing behavior of a gas bubble by UNDEX
Fig.1 水中爆発生成ガスバブルの脈動と浮上挙動の解析例

 Pulsation and surfacing behavior of a gas bubble by UNDEX
Fig.2 水中爆発生成ガスバブルの脈動と浮上挙動の解析例

 Pulsation and surfacing behavior of a gas bubble by UNDEX
Fig.3 time = 2 ms

 Pulsation and surfacing behavior of a gas bubble by UNDEX
Fig.4 time = 60 ms

 Pulsation and surfacing behavior of a gas bubble by UNDEX
Fig.5 time = 110 ms

 Pulsation and surfacing behavior of a gas bubble by UNDEX
Fig.6 time = 150 ms

 Pulsation and surfacing behavior of a gas bubble by UNDEX
Fig.7 time = 210 ms

 Pulsation and surfacing behavior of a gas bubble by UNDEX
Fig.8 time = 270 ms

 Pulsation and surfacing behavior of a gas bubble by UNDEX
Fig.9 time = 310 ms

 Pulsation and surfacing behavior of a gas bubble by UNDEX
Fig.10 time = 360 ms

 Pulsation and surfacing behavior of a gas bubble by UNDEX
Fig.11 time = 570 ms

 Pulsation and surfacing behavior of a gas bubble by UNDEX
Fig.12 time = 800 ms

例題559へ 例題561へ