CAJ | 학술논문

水下爆炸冲击波会使自由液面和结构附近的水域产生空化效应，引起的空化区域在闭合溃灭时会对结构产生较大的二次加载现象。文章理论分析了空化区域的形成，并用ABAQUS模拟计算了水下爆炸冲击波产生的空化区域的膨胀扩大、收缩溃灭过程，将模拟结果与实验值进行比较，结果表明，ABAQUS可以很好地模拟水下爆炸冲击波引起的空化现象，并验证了空化溃灭时对结构的二次加载作用是不可以忽略的。
수하폭작충격파회사자유액면화결구부근적수역산생공화효응，인기적공화구역재폐합궤멸시회대결구산생교대적이차가재현상。문장이론분석료공화구역적형성，병용ABAQUS모의계산료수하폭작충격파산생적공화구역적팽창확대、수축궤멸과정，장모의결과여실험치진행비교，결과표명，ABAQUS가이흔호지모의수하폭작충격파인기적공화현상，병험증료공화궤멸시대결구적이차가재작용시불가이홀략적。
Cavitation can occur in water area near the free surface and structure subjected to underwater shock. A high reloading pressure is generated when the cavitation region collapses. In this paper, the for-mation of cavitation region is analyzed in theory. The evolution and closure of cavitation region are numer-ically simulated by ABAQUS and compared with experimental values. The results show that cavitation can be simulated very well by ABAQUS and the secondary pressure produced in the fluid near the cavitation closure point is proved to be non-ignorable.