Numerical Simulation Using SPH Method On The Detonation And Underwater Explosion Of Explosive

Numerical simulation using the Smoothed Particle Hydrodynamics (SPH) method on the detonation and underwater explosion of explosive is studied from theory, program design and examples analysis in this paper. The main works and aspects of research works in this paper are as follows:a) Plenty of literatures related to the SPH method are investigated and summed up, and the basic theories and design methods of numerical simulation program using the SPH method are mastered. Then through a lot of program practice, a good understanding is obtained of the problems related to the numerical calculation, the shortages in the application of the SPH method, the research progress and the development trend.b) Plenty of literatures are investigated related to the detonation and underwater explosion of explosive, and a quite comprehension about the theories and research progress of the detonation and underwater explosion of explosive is achieved. Then the proper control-equations and equations of state are selected. Furthermore, the process of execution and the principle of circulation of the detonation model are explained.c) The discrete form of equations to solve the detonation and underwater explosion of explosive is obtained by the SPH method and a program using the SPH method is generated to compute the problems of generalized hydrodynamics and the detonation and underwater explosion of explosive.d) Using the generated program, a series of problems of the detonation and underwater explosion of one-dimensional and two-dimensional explosive are simulated and analyzed. In the simulation of the detonation of explosive, the results of numerical simulation tested the size, position and figure of the shock wave successfully, and the main characteristics of explosion are obtained. In the simulation of underwater explosion, the method of point-to-point is introduced to deal with the problems of the common interface. The results of numerical simulation show that the adjusted SPH method is much available to simulate the early phenomenon of underwater explosion.