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Prestressed waveguide structure analysis method and system based on wave finite element method

A finite element method and waveguide structure technology, applied in the field of prestressed waveguide structure analysis, can solve the problem of inability to calculate the dispersion characteristics of complex periodic waveguide structures, and achieve the effect of reducing calculation costs and ensuring calculation accuracy

Pending Publication Date: 2022-01-28
CHINA UNIV OF PETROLEUM (EAST CHINA) +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] In order to solve the above problems, the present invention proposes a prestressed waveguide structure analysis method and system based on the wave finite element method. The present invention can solve the problem that the current analytical method and semi-analytical finite element method cannot calculate the dispersion characteristics of complex periodic waveguide structures. question

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  • Prestressed waveguide structure analysis method and system based on wave finite element method
  • Prestressed waveguide structure analysis method and system based on wave finite element method
  • Prestressed waveguide structure analysis method and system based on wave finite element method

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Effect test

Embodiment 1

[0043] Such as figure 1 As shown, a prestressed waveguide structure analysis method and system based on wave finite element method, including:

[0044]Obtain the periodic substructure of the periodic waveguide;

[0045] Using the Murnaghan hyperelastic model to obtain the modeling data of the periodic substructure;

[0046] According to the periodic substructure and modeling data, the wavenumber-frequency dispersion curves and phase velocity dispersion curves of the prestressed waveguide structure are respectively obtained by using the finite element method.

[0047] Specifically, according to the dispersion curve of the prestressed waveguide structure, the phase velocity values ​​at different characteristic frequencies are obtained, so as to obtain the phase velocity dispersion relationship corresponding to the prestressed waveguide structure.

[0048] Further, obtaining the wavenumber-frequency dispersion curve and the phase velocity dispersion curve of the prestressed wav...

Embodiment 2

[0066] A prestressed waveguide structure analysis system based on wave finite element method, including:

[0067] a data acquisition module configured to acquire the periodic substructure of the periodic waveguide;

[0068] The data modeling module is configured to obtain the modeling data of the periodic substructure by using the Murnaghan hyperelastic model;

[0069] The calculation module is configured to, according to the periodic substructure and the modeling data, use the finite element method to respectively obtain the wave number-frequency dispersion curve and the phase velocity dispersion curve of the prestressed waveguide structure.

Embodiment 3

[0071] A computer-readable storage medium stores a plurality of instructions, and the instructions are suitable for being loaded by a processor of a terminal device and executing a method for analyzing a prestressed waveguide structure based on a wave finite element method provided in this embodiment.

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Abstract

The invention provides a prestressed waveguide structure analysis method and system based on a wave finite element method. The analysis method comprises the following steps of: acquiring a periodic substructure of a periodic waveguide; acquiring modeling data of the periodic substructure by utilizing a Murnaghan hyper-elastic body model; and according to the periodic substructure and the modeling data, respectively acquiring a wave number-frequency dispersion curve and a phase velocity dispersion curve of the prestressed waveguide structure by using the finite element method. According to the method, the waveguide structure with a geometric structure or material attribute periodically changing in the wave propagation direction can be calculated, and the defect that the frequency dispersion characteristic of a complex periodic waveguide structure cannot be calculated through a current analytical method and a semi-analytical finite element method is overcome.

Description

technical field [0001] The invention relates to the technical field of ultrasonic guided wave non-destructive testing, in particular to a prestressed waveguide structure analysis method and system based on wave finite element method. Background technique [0002] The statements in this section merely provide background information related to the present invention and do not necessarily constitute prior art. [0003] Engineering facilities with periodic waveguide structures such as plate shells, pipes, and rods as basic components have a large number of applications in aerospace, petrochemical, transportation, and acoustic metamaterials. Due to the influence of material properties, manufacturing process and service environment (stress, temperature), etc., these waveguide structures will inevitably suffer fatigue, creep, corrosion and other damage, resulting in material performance degradation, which seriously threatens the safe operation of engineering facilities and people's...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/23G06F30/17G06F111/04G06F111/10G06F119/14
CPCG06F30/23G06F30/17G06F2111/04G06F2111/10G06F2119/14
Inventor 张旭陈雷刘刚卢兴国滕厚兴
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)