Far-field shock wave peak pressure distribution of underwater explosion of cylindrical charges
LIU Lei1,2, GUO Rui 1, PEI Shan-bao1,3 , CHEN Liang1 LIU Rong-zhong1
1. School of Aeronautics & Astronautics, Purdue University, West Lafayette, IN 47907, USA;
2. School of Mechanical Engineering, Nanjing University of Sci & Tech, Nanjing 210094, China;
3. School of Mechanical Engineering, Anhui University of Technology, Maanshan 243000, China
Abstract：Based on dynamics analysis software AUTODYN, numerical simulation on underwater explosion of cylindrical charges is completed. Using 2D calculation method under unlimited water and RDX cylindrical charges, shock wave pressure peaks of different positions on 5 directions between axial and radial directions (interval 22.5°) are obtained, and the effects resulted from action direction and aspect ratio on far-field pressure peak distribution are qualitatively analyzed. Then, for avoiding direct quantitative analysis on shock wave of cylindrical charges, the hypothesis that mapping relationship exists between peak pressure distribution of cylindrical charge explosion and that of spherical one with same dose is made. Then, the mapping coefficient is obtained, and the far-field pressure peak distribution is developed combining empirical formulas. Finally, numerical simulation of the TNT charge is done, and the previous hypothesis and distribution formula are preliminarily verified.
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