Monitoring method for corrosive damage of hole edge of aluminum alloy porous structure

A technology for porous structure and damage monitoring, which can be used in measurement devices, analysis of solids using sonic/ultrasonic/infrasonic waves, and material analysis using sonic/ultrasonic/infrasonic waves. It can solve problems such as difficult real-time and effective monitoring.

Inactive Publication Date: 2017-11-24
BEIHANG UNIV
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Problems solved by technology

[0004] Aiming at the problem that it is difficult to effectively monitor the corrosion damage of the hole edge of the porous aluminum alloy structure in real time, this patent proposes a method for monitoring the corrosion d

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  • Monitoring method for corrosive damage of hole edge of aluminum alloy porous structure
  • Monitoring method for corrosive damage of hole edge of aluminum alloy porous structure
  • Monitoring method for corrosive damage of hole edge of aluminum alloy porous structure

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Embodiment Construction

[0062] A method for monitoring corrosion damage of aluminum alloy structures based on an algebraic iterative reconstruction algorithm of the present invention, see Figure 8 As shown, its specific implementation steps are as follows:

[0063] step one:

[0064] This patent selects material Al-2024-T3, and its density, Young's modulus and Poisson's ratio are respectively 2.78g / cm3, 73.1GPa, 0.33. Its size is designed to be 500mm*500mm*2mm. There are 6 holes with a diameter of 10mm in the middle of the aluminum alloy plate, the size of which is as follows figure 2 shown.

[0065] This patent selects the piezoelectric sensor of American Steminc Company for use. The size and appearance of the piezoelectric sensor are shown in Figure 1.

[0066] In this patent, the rectangular array is selected from linear array, rectangular array, circular array and parallel array according to the aluminum alloy material to be tested and the geometric characteristics of the piezoelectric sens...

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Abstract

The invention provides a monitoring method for corrosive damage of the hole edge of an aluminum alloy porous structure based on an iterative algebraic reconstruction algorithm. The monitoring method comprises the following steps: firstly, selecting a porous aluminum alloy, and arranging piezoelectric sensors by a square array layout; secondly, adopting a sine wave exciting signal; thirdly, imaging the damage by applying a tomography scanning algorithm of ART according to the network layout of the piezoelectric sensors and selected signal characteristic quantity; fourthly, carrying out location imaging on the damage by analyzing a correlation coefficient of Lamb waves; fifthly, adopting mean filtering processing, and solving a value of a final pixel by using a mean of a template to replace a value of an original pixel. According to the monitoring method disclosed by the invention, by performing the steps, different piezoelectric sensors are acquired by layout optimization of the piezoelectric sensors and signal monitoring; characteristic parameters are extracted by signal processing, the corrosive damage degree of a porous aluminum alloy member can be quantitatively characterized, and the function of monitoring the corrosive damage of the aluminum alloy structure in real time can be realized.

Description

technical field [0001] The invention provides a method for monitoring corrosion damage at the edge of a hole in an aluminum alloy porous structure, which relates to a method for monitoring corrosion damage at the edge of a hole in an aluminum alloy porous structure based on an algebraic iterative reconstruction algorithm, in particular to a method based on an algebraic iterative reconstruction algorithm (ART) The invention discloses a method for monitoring corrosion damage of an aluminum alloy porous structure, belonging to the technical field of structural health monitoring. Background technique [0002] Structural health monitoring technology comprehensively uses sensor technology, signal processing and analysis technology to monitor the actual situation of the structure in real time, providing an important reference for the safety, reliability and durability of large-scale critical structures. Nondestructive testing based on Lamb waves has a wide range of applications due...

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Application Information

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IPC IPC(8): G01N29/04G01N29/06
CPCG01N29/041G01N29/069G01N2291/0234G01N2291/0423
Inventor 张卫方高晓岩王翔宇冉允萌何晶靖赵炎王邓江
Owner BEIHANG UNIV
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