NUMERICAL MODELING FOR FLUID-STRUCTURE INTERACTION UNDER BLAST AND IMPACT LOADING RESPONSE |
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Authors: | Guo Pan Liu Jun Wu Wenhua |
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Institution: | 1. The State Key Laboratory for Structural Analysis of Industrial Equipment, Department of Engineering Mechanics, Faculty of Vehicle Engineering and Mechanics, Dalian University of Technology, Dalian 116024, China;2. The State Key Laboratory for Structural Analysis of Industrial Equipment, School of Aeronautics and Astronautics, Faculty of Vehicle Engineering and Mechanics, Dalian University of Technology, Dalian 116024, China |
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Abstract: | In this paper, a framework for numerical modeling of fluid and structure interaction (FSI) under blast shock wave has been developed and implement by loose coupling method on the basis of the equivalence of displacement condition. The nonlinear displacement of solid field is simulated by Discontinuous Galerkin Finite Element Method (DGFEM) which is based on the Lagrange method. The flow field is computed by using the cell-centered finite-volume scheme on the assumption of the improved spring analogy. Compared to the analytical results of one-dimensional spring piston problem, the present loose coupling method shows the good performance in computational accuracy in simulating fluid-structure interaction problem. Furthermore, the program framework exhibits the good abilities in simulating the coupling interacting behavior of the reflection and superposition of flow field due to the complex solid deformations. |
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Keywords: | time discontinuous galerkin finite element method (DGFEM)|blast wave|finite volume method|unstructured dynamic mesh |
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