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Hydrodynamic analysis method for porous structure

A porous structure and dynamic analysis technology, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve problems such as failure to find roots and difficulty in giving initial values ​​for iterations

Pending Publication Date: 2020-09-22
OCEAN UNIV OF CHINA
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  • Claims
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Problems solved by technology

This equation is a transcendental equation and needs to be solved by an iterative method, but because its roots are distributed in the entire complex plane, it is difficult to give a reasonable initial value for iteration, which often leads to the failure of finding the root

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  • Hydrodynamic analysis method for porous structure
  • Hydrodynamic analysis method for porous structure
  • Hydrodynamic analysis method for porous structure

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Embodiment Construction

[0081] In order to better explain the present invention and facilitate understanding, the present invention will be described in detail below through specific embodiments in conjunction with the accompanying drawings.

[0082] A method for hydrodynamic analysis of porous structures is disclosed in this embodiment, comprising the following steps:

[0083] S1. Based on potential flow theory and porous medium theory, establish a mathematical model for hydrodynamic analysis of porous structures;

[0084] S2. Establish a linear equation system by matching the velocity potential on the boundary, and use the contour integration technique to reconstruct the matrix coefficients;

[0085] S3. Determine the undetermined coefficients in the velocity potential by solving the equations, and calculate the reflection coefficient, transmission coefficient and energy dissipation coefficient of the porous structure.

[0086] Step S1 described in this embodiment also includes:

[0087] Such as ...

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Abstract

The invention relates to a hydrodynamic analysis method for a porous structure, which comprises the following steps: S1, establishing a porous structure hydrodynamic analysis mathematical model basedon a potential flow theory and a porous medium theory; S2, establishing a linear equation set by matching the velocity potential on the boundary, and reconstructing a matrix coefficient by using a bounding channel integral technology; and S3, determining an undetermined coefficient in the speed potential by solving an equation set, and calculating a reflection coefficient, a transmission coefficient and an energy dissipation coefficient of the porous structure. According to the porous structure hydrodynamic analysis method provided by the invention, the matrix coefficient in the equation set is reconstructed through the enclosure integral technology, and the root of the complex dispersion equation is not needed in the calculation after reconstruction, so that the problem of solving the complex dispersion equation is completely avoided. Compared with a traditional analysis method based on separation variables, the method is simpler and more convenient to implement, a rapid and effectivemeans is provided for hydrodynamic characteristic analysis of the porous structure, and an analysis result can provide scientific guidance for actual engineering design.

Description

technical field [0001] The invention belongs to the technical field of hydrodynamic analysis, in particular to a method for hydrodynamic analysis of porous structures. Background technique [0002] In the hydrodynamic analysis of porous structures in coastal engineering, the porous structure is usually regarded as a uniform and rigid porous medium. At this time, the influence of the porous structure on fluid movement can be represented by three physical parameters: porosity, inertial force coefficient and resistance coefficient. In the traditional theoretical method of hydrodynamic analysis of porous structures under wave action, a typical complex dispersion equation is derived. This equation is a transcendental equation and needs to be solved by an iterative method. However, it is difficult to give a reasonable initial value for iteration because its roots are distributed in the entire complex plane, which often leads to root-finding failure. Contents of the invention ...

Claims

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Application Information

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IPC IPC(8): G06F30/20G06F119/14
CPCG06F30/20G06F2119/14Y02T90/00
Inventor 刘勇李爱军李华军方辉
Owner OCEAN UNIV OF CHINA
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