ZHANG A-man, YAO Xiong-liang. Interaction of Underwater Explosion Bubble With Complex Elastic-Plastic Structure[J]. Applied Mathematics and Mechanics, 2008, 29(1): 81-92.
Citation: ZHANG A-man, YAO Xiong-liang. Interaction of Underwater Explosion Bubble With Complex Elastic-Plastic Structure[J]. Applied Mathematics and Mechanics, 2008, 29(1): 81-92.

Interaction of Underwater Explosion Bubble With Complex Elastic-Plastic Structure

  • Received Date: 2007-03-21
  • Rev Recd Date: 2007-12-10
  • Publish Date: 2008-01-15
  • Considering structure of elastic-plasticity, the combination of boundary element method and finite element method (FEM) was employed to present the calculation method for solving the complex coupling dynamic problem of bubble, plastic-elastic structure and free surface, and the complete threedimensional calculation program was developed as well. The error between calculated result yielded by the program and experimental result is within 10%. Taking surface ship as an example, the three-dimensional calculation program was converted in order to conveniently settle complex elastic-plastic structure problem in engineering field. Finally, a full system of coupling dynamic analysis program was completed, which is fit for solving interaction of three-dimensional bubble with elasticplastic structure in engineering application, aiming at present preference for further research on dynamics of bubble induced by ship underwater explosion. By employing the program, the response of ship under the bubble loading is analyzed. From the wall pressure-time history and stress-time history curves of typical elements of structure, it can be seen that the pressure reaches maximum when the bubble collapses and this validates that the pressure generated by the collapsing of bubble and the jet causes serious damage to the ship structure. From the dynamic process of the interaction of the threedimensional bubble and ship, the low order mode of the ship is provoked and the ship presents whipshaped motion. And the ship does elevation and subsidence movement with the expansion and shrinkage motion of the bubble.
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