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Ultrasonic guided wave frequency dispersion curve calculation method

An ultrasonic guided wave and dispersion curve technology, applied in the field of ultrasonic guided wave dispersion curve calculation, can solve the problems of low calculation efficiency of solving dispersion curve and increased plate thickness, etc.

Pending Publication Date: 2022-07-26
HENAN UNIVERSITY OF TECHNOLOGY
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Problems solved by technology

[0004] The purpose of the present invention is to provide a method for calculating the dispersion curve of ultrasonic guided waves, which is used to solve the problem of low calculation efficiency for solving the dispersion curve caused by the increase of plate thickness

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  • Ultrasonic guided wave frequency dispersion curve calculation method
  • Ultrasonic guided wave frequency dispersion curve calculation method
  • Ultrasonic guided wave frequency dispersion curve calculation method

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Embodiment Construction

[0057] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0058] Method example:

[0059] like figure 1 As shown, the ultrasonic guided wave dispersion curve calculation method of the present invention includes the following steps:

[0060] 1. Use the semi-analytical method to establish a finite element model of the plate structure to be tested. The size of the finite element model and the plate structure to be measured in the thickness direction is the same. At the same time, according to the requirement of solution accuracy, interval B-spline wavelet functions of different scales are selected, and the scale function of the interval B-spline wavelet unit and the unit transformation matrix of the one-dimensional interval B-spline wavelet unit are obtained. Using the scale function of the interval B-s...

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Abstract

The invention provides an ultrasonic guided wave frequency dispersion curve calculation method, and belongs to the technical field of ultrasonic measurement. As the thickness of a to-be-tested plate structure is increased and the structural complexity is increased, when a finite element model of the to-be-tested plate structure is constructed, if a traditional finite element analysis method is adopted, a high-order polynomial interpolation function needs to be adopted, and a large number of units need to be divided, so that the number of finite element grids is increased, and the calculation efficiency is reduced. According to the method, the shape function of the interval B-spline wavelet unit is adopted as the interpolation function for solving, the calculation precision can be guaranteed, a large number of units do not need to be divided, the number of finite element grids is reduced, and the calculation efficiency can be improved.

Description

technical field [0001] The invention relates to a method for calculating a dispersion curve of an ultrasonic guided wave, and belongs to the technical field of ultrasonic measurement. Background technique [0002] Ultrasonic guided wave testing is a new type of non-destructive testing technology developed from traditional ultrasonic testing technology. Compared with traditional ultrasonic bulk waves, guided waves only need a single point of excitation to complete the detection of the entire measured medium, and guided waves have the advantages of fast propagation speed, low energy attenuation and high detection efficiency, so they are widely used in plate structures. rapid detection. The propagation characteristics of guided waves in different waveguide media include some basic information of ultrasonic guided waves. The phase velocity and group velocity dispersion curves of ultrasonic guided waves are mainly solved by establishing relevant models, so as to provide the basi...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/23G06F17/15G06F113/24G06F113/26G06F119/14
CPCG06F30/23G06F17/15G06F2113/24G06F2113/26G06F2119/14
Inventor 常永曹文博刘夕肖软生
Owner HENAN UNIVERSITY OF TECHNOLOGY
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