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Numerical Simulation Using SPH Method on the Detonation and Underwater Explosion of Explosive

Author: ShiLiGuo
Tutor: TangWenHui
School: National University of Defense Science and Technology
Course: Mechanics
Keywords: Smoothed particle hydrodynamics ( SPH ) Dynamite Detonation Underwater explosion Numerical Simulation
CLC: O382.1
Type: Master's thesis
Year: 2007
Downloads: 295
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Abstract


In this thesis, the explosive detonation and underwater explosion smoothed particle hydrodynamics ( SPH ) numerical simulation methods theoretical research, program design and a numerical example , the main work and the results are as follows : 1. Research SPH method related literature , to master the basic theory of the SPH method and numerical simulation program design methods and procedures through a lot of practice , the SPH numerical calculation related issues , the SPH method for the presence of defects and deficiencies in the application , and the SPH method research progress and development trend With a better understanding of ; research literature of explosive detonation and underwater explosion , explosive detonation and underwater explosion theory and research status of a certain understanding ; on this basis , select the appropriate can be used in explosive detonation and underwater explosion simulation equations and the equation of state , and selected explosive detonation model in the SPH method implementation steps and its operation mechanism ; 3 . SPH method for solving the explosives in H and underwater explosion basic equations of the discrete and the preparation of a Cartesian coordinate system of the the SPH calculation procedure for generalized fluid dynamics and explosive detonation and underwater explosion ; 4. prepared by the application program , numerical simulation and analysis of a series of explosive detonation and underwater explosion . Explosive detonation simulation of one-dimensional flat detonation of explosives and a flat two-dimensional wedge charge detonation Two examples were studied and analyzed the results from the simulation analysis , the application of SPH method can well predict the detonation the size and shape of the wave , as well as during an explosion , the pressure distribution, and the main physical properties of the explosives in the simulation process can be captured ; underwater explosion simulations , by introducing a point - to - point the deposit interface processing method , respectively, for the one-dimensional plate explosives underwater explosion and the 2D square explosives underwater explosion were simulated . Numerical examples , the SPH method after appropriate adjustments in the simulation of underwater explosion early physical phenomena ( such as shock) is very effective .

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CLC: > Mathematical sciences and chemical > Mechanics > Explosion > The spread of the detonation wave > Spread in the air, water and underground
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