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An interface decoupling approach to deal with the coupling of compressible fluids and ideal elastoplastic solids in compression

A technology of ideal elastoplasticity and compression state, which is applied in the interface decoupling field of fluid-solid coupling, and can solve problems such as stagnation and fluid-solid coupling difficulties

Inactive Publication Date: 2017-08-29
BEIHANG UNIV
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Problems solved by technology

It can be seen that although the numerical method for solving this problem has been developing, due to the difficulty of fluid-solid coupling, the research in this direction still mainly stays in the single-medium stage

Method used

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  • An interface decoupling approach to deal with the coupling of compressible fluids and ideal elastoplastic solids in compression
  • An interface decoupling approach to deal with the coupling of compressible fluids and ideal elastoplastic solids in compression
  • An interface decoupling approach to deal with the coupling of compressible fluids and ideal elastoplastic solids in compression

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Embodiment Construction

[0052]In order to illustrate the specific implementation of the present invention, a simple example is given. Consider the one-dimensional Riemann problem in which the ideal elastic-plastic solid aluminum on the right is impacted by high-pressure and high-speed water on the left, where the initial dimensionless value of the two media is u L =50.0,p L =50000.0,ρ L = 1.507, u R =0.0,p R =1.0,ρ R =2.7,s R =0.0. The relevant dimensionless parameters of the equation of state for aluminum are ρ 0 =2.71,c 0 = 538.0, gamma s =2.71, K=740000.0, μ=265000.0, Y 0 = 3000.0.

[0053] This problem will generate a shock wave in the water on the left and both elastic and plastic waves in the ideal elastoplastic solid on the right. By adopting the exact solution, the total stress, velocity and density at time t=0.001 can be obtained as Figure 2 to Figure 4 shown.

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Abstract

The invention provides an interface decoupling technology used for processing coupling between compressible fluid and an ideal elastic-plastic solid in a compression state. The main content is a precise solving algorithm which is used for solving the multi-medium Riemannian problem of coupling between the one-dimensional compressible fluid and the ideal elastic-plastic solid in the compression state. The algorithm is used in combination with a corrected virtual medium method, so that the purpose of decoupling on a fluid and solid coupling interface is achieved.

Description

technical field [0001] The invention relates to an interface decoupling method for dealing with fluid-solid coupling, in particular to an interface decoupling method for compressible fluid and elastic-plastic solid coupling in a compressed state. Background technique [0002] Fluid-solid coupling is a research direction for studying the interaction between fluid and solid, and it is a branch of disciplines arising from the intersection of fluid mechanics and solid mechanics. At the same time, it is also a research field that scientific researchers have been interested in for a long time, because it includes many practical problems in engineering, such as wing flutter caused by the interaction between air and wing, explosion or impact in fluid The response of the structure, the oscillation of the floating structure caused by the action of seawater and the floating structure, and the like. [0003] Although the research on the fluid-solid interaction problem has been carried ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F19/00
Inventor 高斯刘铁钢
Owner BEIHANG UNIV
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