关键词: 水下爆炸, 势流, 边界积分法, 有限元法

Abstract: The flow is solved by using the boundary integral equation method and the higher order finite element discretization on the assumption that the water is inviscid and incompressible,the flow is potential and the bubble gas obeys the isoentropic rule. The evolution of the bubble is simulated by means of a mixed Euler-lagrangian method. The comparison of the numerical results with the “exact solution” of a spheric bubble and experimental data shows that the mathematical model is reasonable and the 3-D numerical method has high accuracy.The dynamic load on the body and important behavior of the bubble,such as migration and jetting,are derived.

Key words: underwater explosion, potential flow, boundary integral method, finite element method