Based On The Difference Scheme Of High Energy Transfer Method Of Numerical Simulation And Analysis

Energetic Materials are widely used in industry, commerce and military, especially in national defense. Peak overpressure is the primary measurement of high energy material. In early period, data is usually obtained by experiment test. As for the extreme experiment environment, data is limited. Although there are several empirical formulas, but these formulas cannot uncover all internal laws of energy transmit, especially for aluminized high materials. With the development of computation technology, numerical simulation methods draw more and more attention.Finite element method (FEM) and finite difference method (FDM) are two main simulation methods. Commercial software like ANYSYS or LS-DYNA chose finite element method. But this platform is huge with applications of all fields and complicated parameter choosing. Subdivision of grid leads to enormous computation without ideal results. From the viewpoint of specialized product design, this software has disadvantage of later exploitation of professional software. Considering these shortages, increasingly importance has been attached to FDM. In this paper, we do some research about energy transmit in air with Lax-Friedrichs based difference method. Numerical results show this method has more advantages than FEM. The last part, we discussed JWL coefficients of aluminized material formulas in order to provide a reference.