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A Numerical Method for Simulating Fluid-induced Vibration of Elastic Solids

An elastic solid, numerical method technology, applied in CAD numerical modeling, special data processing applications, design optimization/simulation, etc., can solve the problem that the fluid domain and the solid domain cannot be solved separately, and the independent variables cannot be eliminated explicitly. The effect of reducing mechanical vibration, reducing noise and ensuring smooth operation

Active Publication Date: 2020-09-04
方立环保设备河北有限公司
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Problems solved by technology

Fluid-solid coupling calculation has two notable features: (1) The calculation of fluid domain and solid domain cannot be solved separately; (2) The independent variables describing the motion of fluid and solid cannot be explicitly eliminated

Method used

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Embodiment Construction

[0032] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0033] The invention provides a numerical method for simulating the vibration of an elastic solid caused by a fluid, which includes the following steps, see figure 1 Shown:

[0034] Step (1), construct the governing equation of fluid and elastic solid, the governing equation of fluid comprises equation (11) and equation (12), the governing equation of elastic solid is equation (13):

[0035]

[0036]

[0037]

[0038] in, is a vector differential operator, u represents the velocity vector of the fluid particle, and ρ represents the density of the fluid, Represents the acceleration of the fluid particle, σ(x,t) represents the surface tension of the fluid, σ f (x,t) represents the stress tensor of the fluid, f s (x,t) represents the force density of the elastic solid on the fluid, For the symbol of partial derivative, X(s,t) is ...

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Abstract

The invention relates to a numerical method for simulating fluid to cause elastic solid vibration. The method comprises the following steps: programming and solving a constructed control equation of fluid and elastic solid, a constructed invasion boundary method and a constructed elastic solid force density formula by adopting Fortran software; importing the file obtained by calculation into fluid visualization processing software for performing visualization processing, thereby obtaining the speed and pressure distribution chart of the elastic solid. Compared with the prior art, the method disclosed by the invention has the advantages that the fluid control equation and solid control equation are iteratively calculated through the invasion boundary method and the elastic solid force density formula, so that the numerical method can capture an instantaneous evolution rule of a flow-induced vibration phenomenon, and the error between the simulated flow-induced vibration phenomenon and a real flow-induced vibration phenomenon is small; structural parameters of elastic solids in water treatment equipment are guided and optimized by utilizing numerical simulation results, so that the mechanical vibration is effectively reduced, steady operation of the water treatment equipment is ensured, and the noise is further reduced.

Description

technical field [0001] The invention relates to a numerical method for simulating the vibration of an elastic solid caused by a fluid. Background technique [0002] Noise pollution is a kind of chronic damage to the human body. Long-term exposure to heavy noise pollution can easily cause nervous system diseases such as dizziness, insomnia, and tinnitus. With the improvement of urban residents' requirements for drinking water standards, public and household cleaning / water-saving equipment has been widely promoted and popularized, but noise pollution is one of the common problems of current cleaning / water-saving equipment. The phenomenon of flow-induced vibration in water treatment equipment is one of the main causes of noise. Therefore, systematically studying and mastering the mechanism of flow-induced vibration of different materials is an effective way to improve the quality of water treatment equipment products. [0003] The phenomenon of fluid-induced vibration has alwa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/20G06F111/10
CPCG06F30/367
Inventor 邢天宇高俊虎
Owner 方立环保设备河北有限公司
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