多重モードラム波からの単一モードの抽出と欠陥検出への応用

林, 高弘; 川嶋, 絋一郎

日本機械学会論文集A編, 2001, 67(664), 1959-1965

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Identifier to cite or link to this item: https://hdl.handle.net/11094/88620

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Title
多重モードラム波からの単一モードの抽出と欠陥検出への応用
Extraction of a single mode from multiple modes of lamb wave and its application to defect detection
タジュウ　モード　ラムハ　カラ　ノ　タンイツ　モード　ノ　チュウシュツ　ト　ケッカン　ケンシュツ　ヘノ　オウヨウ
Creator
NRID
1000030324479 1000030324479
ORCID
0000-0001-6064-4658 0000-0001-6064-4658
researchmap permalink
takahiro_hayashi takahiro_hayashi
Scopus Author ID
37064150200 37064150200
CreatorName
林, 高弘 ; ハヤシ, タカヒロ ; Hayashi, Takahiro
NRID
1000050023239 1000050023239
CreatorName
川嶋, 絋一郎 ; カワシマ, コウイチロウ ; Kawashima, Koichiro
Subject
Air coupled ultrasonic
Fast fourier transform
Lamb wave
Nondestructive inspection
Signal filtering
Ultrasonic inspection
Abstract
Lamb waves generally consist of many dispersive modes, which makes mode identification difficult. This study discribes the extraction of a single mode from multiple modes. The single mode extraction is based on two dimensional Fast Fourie Transform (2 D FFT) in time and space, signal filtering and 2 D inverse FFT. Air-coupled ultrasonic technique were adopted for non-contact fast measurements. Using this technique, the A 0 and S 0 modes were clearly detected in preliminary tests of intact plates. Furthermore, multiple reflections of the A 0 mode, which were shown only in the computer simulation, were experimentally confirmed in reflection tests of plates with a square notch. In the reflection tests, two reflected waves were extracted in the intervals corresponding to notch widths.
Publisher
日本機械学会
The Japan Society of Mechanical Engineers
Source Title
日本機械学会論文集A編
Volume (Issue)
67(664)
Page
1959-1965
Date of Issued
2001-12-25
Language
English
Handle URL
https://hdl.handle.net/11094/88620
PISSN
03875008
eISSN
18848338
NCID
AN0018742X
AA11552999
Relation.isVersionOf
DOI (Publisher Version)
https://doi.org/10.1299/kikaia.67.1959
Access Rights
open access
oaire:version
Accepted Manuscript
Category
学術雑誌論文 Journal Article