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Fluid-structure interaction and engagement impact Algorithm and Implementation

Author: LiuLei
Tutor: XuShengLi
School: University of Science and Technology of China
Course: Engineering Mechanics
Keywords: FSI FEM Impact load Dynamic Response Contact Impact
CLC: O353.4
Type: Master's thesis
Year: 2011
Downloads: 212
Quote: 1
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Abstract


This paper studies two parts, covering the impact load of fluid-structure interaction problems and exposure to the impact of the problem. This part of the flow field numerical flow field using TVD scheme for solving the Euler equations, numerical part of a solid three-dimensional isoparametric finite element solution Lagrange coordinate system virtual work equation, the contact part is Pinball Method impact algorithm for solving the contact surface of the master-slave The contact force between the units. Calculation procedures based on the existing platform, adding a compressible foam material type and geotechnical and two kinds of viscoelastic constitutive material. Calculate the composite perforation after bomb detonation combustion of gunpowder field and its spread in the water, in the flow field impact load is applied to the case of rock material to simulate the dynamic response of rock material, has been broken rock dynamic regional distribution, and the relationship between the parameters and loading. For preset different angles cracked plate structure, analyze its impact load, the crack propagation law, the distribution of stress field around the crack. Pinball Method achieved using the contact impact algorithm, this algorithm dimensional elastic contact in a collision, three-dimensional and three-dimensional high-speed low-speed collisions in case of collision calculations were checked. Further calculations containing fluid-solid coupled with exposure to the impact of numerical examples, obtained a series of calculations. The main contents are summarized as follows: 1. First chapter introduces the research background, research and related areas of the main research content. (2) This chapter describes the calculation of solid and fluid, the contact impact algorithm theoretical basis, focusing on the finite element method and solid contact with the theoretical basis of the impact of algorithms, discrete form of the boundary conditions and the numerical solution. 3 The third chapter describes the first part of the added two constitutive relation, the second part first numerical examples involving fluid-solid coupling field calculation burning gunpowder, rocks under high pressure gas fracturing process, the dynamic crushing area distribution. The second study calculated the impact load, the preset angles cracked plate crack crack propagation law and variation of the stress field around. 4 Chapter IV of the contact details of the impact of the proposed algorithm. Pinball Method used to achieve the contact algorithm, the contact force using two different solving methods, both have their own scope, and use three examples of the program assessment was carried out verification. 5 The fifth chapter is mainly FSI calculation and calculate the impact of exposure to further study. 6 The sixth chapter is the conclusion and future research proposals.

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CLC: > Mathematical sciences and chemical > Mechanics > Fluid Mechanics > Fluid vibration and wave > The impact of solid and fluid
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