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| Application of modified method of characteristics in forward and inversion simulations of underwater explosion |
| Received:January 26, 2016 Revised:June 02, 2016 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7511/jslx201702019 |
| KeyWord:modified method of characteristics underwater explosion interface inversion inverse difference schemes |
| Author | Institution |
| 张程娇 |
大连理工大学 工程力学系 工业装备结构分析国家重点实验室 大连 |
| 李晓杰 |
大连理工大学 工程力学系 工业装备结构分析国家重点实验室 大连 |
| 闫鸿浩 |
大连理工大学 工程力学系 工业装备结构分析国家重点实验室 大连 |
| 王小红 |
大连理工大学 工程力学系 工业装备结构分析国家重点实验室 大连 |
| 杨晨琛 |
大连理工大学 工程力学系 工业装备结构分析国家重点实验室 大连 |
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| Abstract: |
| This paper introduces a modified method of characteristics and its application in forward and inverse simulations of underwater explosion. Underwater explosion of spherical TNT explosive is simulated by using the modified method, and the simulated results are compared with those from empirical formula and AUTODYN. The comparisons indicate that the modified method can be used to solve underwater explosion accurately and capture propagation of weak shock of flow field. The modified method is also applied to gas-water interface inversion of underwater explosion. In the inverse simulation, the shock wave from the forward simulation is taken as the initial condition, and inverse difference schemes for inverse simulation are applied. The calculated inversion interface is compared with the forward one, and they are in good agreement in near field. |