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Fluid-solid coupling calculation method for interface bidirectional data exchange

A technology of data exchange and fluid-solid coupling, which is applied in calculation, electrical digital data processing, computer-aided design, etc., can solve problems that cannot meet actual needs, facilitate the processing of complex fluid-solid coupling problems, improve simulation accuracy, and The effect of conceptual clarity

Active Publication Date: 2020-04-03
NORTH CHINA UNIV OF WATER RESOURCES & ELECTRIC POWER
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, domestic and foreign studies on the coupling of fluid domain and solid domain have different advantages and disadvantages. The traditional calculation method is to calculate the effects of water and solid separately. In the water domain calculation, the boundary of the solid domain is set as Rigid body, in the calculation of solid domain, the role of fluid domain is applied through a simplified load form. Since the water body domain and solid domain will affect each other in the calculation, only considering the structure of water body or solid domain cannot meet the actual needs. In order to solve this problem Contradictions, it is necessary to find a way to combine the fluid domain and the solid domain, and consider the influence of the interaction between them, so it is imperative to study the fluid-solid coupling problem

Method used

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  • Fluid-solid coupling calculation method for interface bidirectional data exchange
  • Fluid-solid coupling calculation method for interface bidirectional data exchange
  • Fluid-solid coupling calculation method for interface bidirectional data exchange

Examples

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Effect test

Embodiment 1

[0048] Example 1: When the fluid domain and the solid domain are in contact with each other, the solid domain will be subjected to stress and strain, and these forces will deform its structure, and the deformation of the structure will also affect the fluid domain accordingly, and then interact, for For this phenomenon, this embodiment provides a fluid-solid coupling calculation method for two-way data exchange at the interface. This method fully considers the mutual influence between the fluid domain and the solid domain, and makes the fluid force field closely related to the bearing capacity of the solid domain infrastructure. Study the law of its structural damage development and change.

[0049]Before calculating the fluid-solid interface, it is necessary to study the interaction force between the water body and the channel panel, which requires the establishment of fluid-solid control equations according to different research objects. The connection between the fluid domai...

Embodiment 2

[0124] Embodiment 2: The similarities between this embodiment and Embodiment 1 will not be repeated, and the difference is that in Step6, the nearest neighbor unit is found by the unit, and the specific steps are as follows:

[0125] 1. Decompose all units into triangles;

[0126] 2. Establish a boundary square, and record the triangle small square generated by the intersection of the established boundary square and the triangle target unit;

[0127] 3. Project the small triangular square recorded in 2 onto the plane to find the nearest triangular unit, such as Figure 7 As shown, prepare for the calculation. For each triangle projected onto the plane, its area and weight relative to all intersecting areas can be calculated separately, and the calculation formula is as follows:

[0128]

[0129] Among them: A i represents the intersection area, Indicates the total area of ​​the intersection area, and the weight size does not exceed 1.

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Abstract

The invention relates to the technical field of fluid-solid coupling, and particularly relates to a fluid-solid coupling calculation method based on interface bidirectional data exchange. According tothe invention, the method comprises the steps: employing an implicit algorithm of commercial software ABAQUS for solid domain calculation structural dynamics; calculating the computational fluid dynamics by adopting a Fluent platform; finally, exchanging the data calculated by the two platforms by an MPCCI platform, and solving the established CFD / CSD model by utilizing a data coupling exchange method on a fluid domain / solid domain interface, so a fluid domain force field is closely related to the bearing capacity of a solid domain infrastructure, so that the aim of solving the problem of hydraulic and structural coupling calculation in engineering is fulfilled.

Description

technical field [0001] The invention belongs to the technical field of fluid-solid coupling calculation methods, and in particular relates to a fluid-solid coupling calculation method for interface bidirectional data exchange. Background technique [0002] Fluid-solid coupling is a special phenomenon objectively existing in nature. It refers to the interaction between fluid and solid. It can be seen everywhere in nature. However, neither the fluid domain nor the solid domain can be solved independently. Therefore, to solve this problem, it is necessary to combine the flow The solid coupling is then solved. Fluid-solid coupling mechanics is a branch of mechanics formed by the intersection of fluid mechanics and solid mechanics, and is a specific means of studying the interaction between fluid and solid media. At present, domestic and foreign studies on the coupling of fluid domain and solid domain have different advantages and disadvantages. The traditional calculation metho...

Claims

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Application Information

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IPC IPC(8): G06F30/23G06F30/28G06F113/08
Inventor 许新勇段春青聂相田徐昕昀张程许文杰谢晨龙
Owner NORTH CHINA UNIV OF WATER RESOURCES & ELECTRIC POWER
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