Open AccessNumerical Simulation Optimization of Mach Reflection of Near Ground Air Explosion
Author(s) -
Fuyuan Li,
Jie Ren,
Zhong Jianlin,
Xinxin Liu
Publication year - 2021
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1986/1/012123
Subject(s) - mach number , mach reflection , mach wave , reflection (computer programming) , coupling (piping) , shock (circulatory) , computer simulation , shock wave , mechanics , physics , computer science , engineering , mechanical engineering , medicine , programming language
In order to optimize the numerical simulation method of Mach reflection, three numerical simulation schemes of ALE method, LBE method and coupling method are compared based on the finite element analysis software LS-DYNA. The calculation results are compared with the test data of UFC 3-340-02 manual and related literature, and internal comparison is made to put forward the numerical calculation optimization scheme of Mach reflection. The results show that the calculation results of the three schemes are in good agreement with UFC 3-340-02 and test results. When only Mach reflection is considered on a single surface, LBE method is selected. The coupling method and ALE method are selected when considering the interaction of shock wave between non ground objects. When the object is completely or mostly in the Mach reflection region, the calculation time of the coupling method is only one sixth of that of the ALE method. When the effect of the object on the air flow field is strong and the area in the Mach reflection region is small, ALE method is selected.