Ultrasonic guided-wave optimal excitation frequency selection method and device, equipment and storage medium

A technology of excitation frequency and ultrasonic guided wave, applied in mechanical equipment, design optimization/simulation, gas/liquid distribution and storage, etc., can solve problems such as pipe wall thinning, gas or liquid leakage, pipe corrosion, etc., to improve intuitive The effect of visibility

Active Publication Date: 2021-10-29
DONGGUAN UNIV OF TECH +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to long-term use and deep burial underground, the outer layer of the pipeline is particularly susceptible to corrosion due to the influence of complex underground environmental factors, resulting in thinning of the pipe wall or cracks, causing safety accidents such as gas or liquid leakage

Method used

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  • Ultrasonic guided-wave optimal excitation frequency selection method and device, equipment and storage medium
  • Ultrasonic guided-wave optimal excitation frequency selection method and device, equipment and storage medium
  • Ultrasonic guided-wave optimal excitation frequency selection method and device, equipment and storage medium

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Experimental program
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Effect test

Embodiment 1

[0068] Such as figure 1 with figure 2 As shown, this embodiment provides a method for selecting the optimal excitation frequency of ultrasonic guided waves, which is applied to the detection of ultrasonic guided waves for polyurea anti-corrosion pipelines, including the following steps:

[0069] S201. Construct a polyurea anticorrosion pipeline simulation model.

[0070] Further, this step S201 specifically includes:

[0071] S2011. By analyzing the analytical model of the polyurea anticorrosion pipeline, it is judged that the polyurea anticorrosion pipeline is approximately an idealized structure of an isotropic viscoelastic-elastic material double-layer cylinder, and it is assumed that the viscoelastic polyurea anticorrosion layer and the elastic pipeline have an ideal structure The contact surfaces are tightly bonded without any relative displacement.

[0072] S2012. Select a three-dimensional solid unit as the elastic pipe, and set the material density, Young's modulus...

Embodiment 2

[0110] This embodiment provides a defect location simulation analysis method applied to different damage levels in polyurea anticorrosion pipelines. The polyurea anticorrosion pipeline defect location system adopted is as follows: Figure 8 As shown, the specific implementation process is as follows:

[0111] S1: Based on the polyurea anti-corrosion pipeline simulation model in the above-mentioned embodiment 1, circumferential cracks with different cross-sectional loss rates are set at a distance of 1.2m from the signal excitation end, such as Figures 9a-9d As shown (a is intact, b is the circumferential length of the crack is π / 6, c is the circumferential length of the complete crack is π / 5, d is the circumferential length of the complete crack is π / 4), the width is 2mm, and the depth Both are 3mm. The settings of circumferential crack defects are shown in Table 3 below.

[0112] Table 3 Settings of circumferential crack defects

[0113]

[0114] S2: According to the l...

Embodiment 3

[0121] Such as Figure 10 As shown, this embodiment provides a device for selecting the optimal excitation frequency of ultrasonic guided waves, which is applied to the detection of ultrasonic guided waves for polyurea anti-corrosion pipelines, including a construction module 1001, a demarcation module 1002, a loading module 1003 and a selection module 1004 , the specific functions of each module are as follows:

[0122] The construction module 1001 is used to construct a polyurea anticorrosion pipeline simulation model.

[0123] Delineation module 1002, used to delineate the frequency range of L(0,2) longitudinal wave in the non-dispersion section as the optional range of optimal excitation frequency based on the dispersion curve of ultrasonic guided wave propagation in polyurea anticorrosion pipeline .

[0124] The loading module 1003 is used to load L(0,2) longitudinal waves at different excitation frequencies in the bare pipe and polyurea anti-corrosion pipeline simulati...

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Abstract

The invention discloses an ultrasonic guided-wave optimal excitation frequency selection method and device, equipment and a storage medium. The method is applied to ultrasonic guided-wave detection of a polyurea anti-corrosion pipeline, and comprises the following steps of constructing a polyurea anti-corrosion pipeline simulation model; selecting a frequency range of L (0, 2) longitudinal waves in a non-frequency dispersion section as an optional range of an optimal excitation frequency on the basis of a frequency dispersion curve of ultrasonic guided-wave propagation in a polyurea anti-corrosion pipeline; loading the L (0, 2) longitudinal waves under different excitation frequencies in a bare pipe and the polyurea anti-corrosion pipeline simulation model respectively, carrying out data average processing on signals collected by a receiving end, and obtaining a time travel curve of the L (0, 2) longitudinal waves propagated in the bare pipe and polyurea anti-corrosion pipeline simulation model under different frequencies within a certain time length; and selecting the optimal excitation frequency by combining attenuation characteristic analysis. According to the ultrasonic guided-wave optimal excitation frequency selection method and device, the equipment and the storage medium provided by the invention, weak defects with different damage degrees in the polyurea anti-corrosion pipeline can be effectively identified and positioned, and meanwhile, the feasibility of realizing detection by utilizing an ultrasonic guided-wave detection technology in the polyurea anti-corrosion pipeline is also shown.

Description

technical field [0001] The invention relates to an ultrasonic guided wave detection technology, in particular to a method, device, system and storage medium for selecting an optimal excitation frequency of an ultrasonic guided wave, belonging to the technical field of nondestructive testing. Background technique [0002] At present, most of the domestic buried pipelines are used in the transportation industries such as natural gas, petrochemical gas, oil, and municipal sewage. Due to long-term use and deep burial, the outer layer of the pipeline is particularly susceptible to corrosion due to the influence of complex underground environmental factors, resulting in thinning of the pipe wall or cracks, which may cause safety accidents such as gas or liquid leakage. Therefore, it is very important to select the appropriate anti-corrosion pipeline and to carry out effective detection on the pipeline. [0003] With the continuous update and development of various types of anti-c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F17D5/06G06F30/23
CPCF17D5/06G06F30/23
Inventor 马宏伟梁灝然武静刘仲铭邹厚德
Owner DONGGUAN UNIV OF TECH
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