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Composite material structure based fluid-solid coupling value prediction method

A composite material and fluid-solid coupling technology, applied in the direction of electrical digital data processing, special data processing applications, instruments, etc., can solve problems such as insufficient consideration, achieve high-precision numerical prediction, improve reliability, save experimental costs and the effect of time

Active Publication Date: 2018-04-10
BEIJING INSTITUTE OF TECHNOLOGYGY
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Problems solved by technology

[0005] The purpose of the present invention is to propose a fluid-solid coupling numerical prediction method based on a composite material structure in view of the problem that the fluid-solid coupling of the existing composite material hydrofoil is not considered comprehensive enough

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Embodiment 1

[0045]Under the action of the flow field, the composite material structure will produce large deformation, which will affect the flow field structure and improve the hydraulic performance of the structure. Applied to hydraulic machinery, it can effectively improve the efficiency of hydraulic machinery. In order to obtain a composite material structure that can effectively improve efficiency and guide the actual design and processing, this example adopts a fluid-structure coupling numerical prediction method based on composite material structure, and analyzes the flow of composite hydrofoils under different design parameters. Numerical prediction of solid-coupling characteristics can quickly obtain composite material structures that can effectively improve efficiency. Among them, the design parameter is the ply angle of the partial ply of the composite material. Corresponding to the efficiency of hydraulic machinery, the design goal of composite hydrofoils is the lift-to-drag ...

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Abstract

The invention relates to a composite material structure based fluid-solid coupling value prediction method, and belongs to the technical field of impeller mechanical simulation. The method comprises the steps that a composite material hydrofoil structure model is built, mesh generation is conducted, a three-dimensional basin is built, mesh generation is conducted on the three-dimensional basin, and a computational fluid dynamics model is built; initial steady flow field numerical calculation and unsteady flow-solid coupling numerical calculation are conducted, calculation results are subjectedto postprocessing, and the dynamic change process of the flow field structure and composite material hydrofoil deformation over time is obtained. Accordingly, influences of the fluid viscosity and the three-dimensional shape of the structure are fully considered, and the reliability of the numerical calculation result is enhanced; in addition, high-precision numerical prediction on the compositematerial hydrofoil fluid-solid coupling phenomenon can be achieved.

Description

technical field [0001] The invention relates to a fluid-solid coupling numerical prediction method of a composite material hydrofoil, belonging to the technical field of turbomachinery simulation. Background technique [0002] In recent years, with the development of technology, the wide use of composite materials makes hydraulic machinery have the characteristics of low vibration, low noise, light weight, high efficiency and corrosion resistance. Due to the change of mass ratio, stiffness and damping of composite materials, the unsteady, nonlinear and strong coupling of fluid-solid coupling and hydroelastic behavior of composite blades become more obvious. The internal coupling effect of the composite material itself, such as the bending-torsion coupling effect, makes the fluid-structure interaction response of the composite material more complicated. Therefore, exploring the fluid-structure interaction characteristics of composite structures has more practical engineering...

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/17G06F30/23Y02T90/00
Inventor 吴钦张汉哲陈倩黄彪王国玉
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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