SPH algorithm about underwater contact explosion of warship
Ming Fu-ren1，Zhang A-man1，Yang Wen-shan2，Liu Cui-dan1
Author information+
College of Ship building Engineering，Harbin Engineering University，Harbin 150001，China
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History+
Received
Revised
Published
2011-03-11
2011-05-11
2012-05-28
Issue Date
2012-05-28
Abstract
Underwater contact explosion of warship involves multiphase materials, extremely non-uniform density distribution, and impedance mismatch seriously, at the same time, large deformation, strong shock and other factors make it difficult to simulate by traditional numerical algorithms. This paper aims to improve the traditional SPH algorithm, and apply it to underwater contact explosion of warship. The linked-list search algorithm with variable smoothing length is proposed, not only to improve the computational efficiency but also to guarantee the accuracy. Meanwhile, the mechanisms of dealing with non-uniform density problems are summarized and the pre-treatment and post-processing to improve the capacity of dealing difficult problems and visibility are studied. Finally, the underwater contact explosion is simulated successfully, and the results are consistent with the theories, which verify the effectiveness and feasibility of the proposed theories. Besides, the influence on numerical simulation of different particle spacing is analyzed, which shows that when particle spacing is less than 2:1, numerical results are relatively stable, but it collapses when particle spacing 5:1.
Ming Fu-ren;Zhang A-man;Yang Wen-shan;Liu Cui-dan.
SPH algorithm about underwater contact explosion of warship[J]. Journal of Vibration and Shock, 2012, 31(10): 147-151
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