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Method for improving phased array ultrasonic detection capability of R region of complex-shaped component

A complex shape, ultrasonic detection technology, applied in the processing of detection response signals, the use of sound waves/ultrasonic waves/infrasonic waves for material analysis, measuring devices, etc., can solve the problems of insufficient lateral resolution and unsatisfactory detection results, and improve the lateral The effect of detection resolution, improvement of detection ability, and improvement of lateral resolution

Active Publication Date: 2020-06-16
DALIAN UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Studies have shown that SAUL has a good detection effect on a single defect in the R-zone of complex-shaped components, but when there are two or more defects in the circumferential direction of the R-zone, the detection effect is not ideal due to its insufficient lateral resolution

Method used

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  • Method for improving phased array ultrasonic detection capability of R region of complex-shaped component
  • Method for improving phased array ultrasonic detection capability of R region of complex-shaped component
  • Method for improving phased array ultrasonic detection capability of R region of complex-shaped component

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Embodiment Construction

[0025] (1) Establish a finite element simulation model

[0026] For the T-shaped truss sample of CFRP material, the density of the sample was measured by the Archimedes drainage method to be 1542 kg / m 3 ; According to the metallographic method, the thickness of the single layer of the sample is 0.15 mm, and the total number of layers is 40 layers, of which the R area part is 20 layers, and the layering sequence is [45° / 90° / -45° / 0°]5 , the total thickness is 3.0 mm, the radius of curvature of the R zone is 5 mm, and the center angle is 90°. The ultrasonic liquid immersion back reflection method is used to measure the sound velocity of CFRP material T-shaped stringer corresponding to the different directions of the one-way plate sample, and then the elastic stiffness matrix of the one-way plate layer in the 90° direction is obtained through the inversion of the simulated annealing algorithm, and then the bond transformation is carried out. The elastic stiffness matrices of the ...

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Abstract

The invention discloses a method for improving phased array ultrasonic detection capability of an R region of a complex-shaped component, and belongs to the field of high-end equipment manufacturing and detection. The method comprises the following steps: establishing a phased array ultrasonic detection model of an R region of a component with a complex shape; designing a phased array ultrasonic surface adaptation method (SAUL), and combining the SAUL with a receiving focusing detection scheme; reading the sound time from each aperture array element to the corresponding focus by using a finiteelement model, and calculating a phased array ultrasonic detection receiving focusing rule of the R region of the complex-shaped component; transmitting ultrasonic waves by utilizing SAUL, receivingthe scanning signal A in parallel by each array element, and carrying out receiving focusing processing to obtain an imaging result of phased array ultrasonic surface self-adaption method combined with receiving focusing. According to the method, on the basis of SAUL, receiving focusing is combined to improve the transverse resolution of phased array ultrasonic detection of the R area of the component in the complex shape, so the detection noise is reduced, the artifacts are avoided, and a support is provided for high-quality detection of defects of the R area of the component in the complex shape.

Description

technical field [0001] The invention relates to a method for improving the R-zone phased array ultrasonic detection capability of components with complex shapes, and belongs to the field of high-end equipment manufacturing and detection. Background technique [0002] With the development of industrial technology and the continuous improvement of structural design requirements, the geometry of engineering components is becoming more and more complex, and corner areas, namely R areas, are common. In the process of manufacture and use, the R zone is prone to defects. In order to ensure the manufacturing quality and service safety of components, reliable non-destructive testing technology must be developed. At present, phased array ultrasonic technology has shown great application potential in the detection of R-zone defects of complex-shaped components, but there are still problems such as poor shape adaptability and weak defect resolution. Phased array ultrasonic surface adap...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N29/44
CPCG01N29/4418G01N29/4472
Inventor 罗忠兵林莉李飞龙苏慧敏张松
Owner DALIAN UNIV OF TECH
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