任意断面形状を有する棒状材料中のガイド波モードの解析

林, 高弘; 陶山, 光宣; 阿部, 司

日本機械学会論文集A編, 2006, 72(724), 1935-1940

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Identifier to cite or link to this item: https://hdl.handle.net/11094/88619

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Title
任意断面形状を有する棒状材料中のガイド波モードの解析
Modal analysis of guided waves in a bar with an arbitrary cross-section
ニンイ　ダンメン　ケイジョウ　ヲ　ユウスル　ボウジョウ　ザイリョウ　チュウ　ノ　ガイドハ　モード　ノ　カイセキ
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
CreatorName
陶山, 光宣 ; スヤマ, ミツノブ ; Suyama, Mitsunobu
CreatorName
阿部, 司 ; アベ, ツカサ ; Abe, Tsukasa
Subject
Curved surface scanning
Dispersion curves
Guided waves
Rail
Ultrasonic nondestructive inspection
Abstract
Ultrasonic wave packets propagate in the longitudinal direction by inputting low frequency ultrasonic into such bar-like structures as rails. This ultrasonic mode, called guided wave has become popular as a promising technique for rapid long-range nondestructive inspection for pipes and rails. In guided wave inspection, guided wave velocities (dispersion curves) and wave structures are firstly needed. Dispersion curves and wave structures can be analytically derived for such simple structures as plates and pipes, but not for bar-like structures with complex cross-section such as rails. Authors have developed calculation technique to obtain the dispersion curves and wave structures for such structures using a special finite element method called a semi-analytical finite element method in which dispersion curves and wave structures can be obtained as eigenvalues and eignvectors of an eigensystem. This study developed more accurate calculation technique for dispersion curves and wave structures using mirror relation of guided wave modes and an iteration method for solution of the eigen problem. And experimental studies for JIS 6 kg rail verify that dispersion curves and wave structures were obtained with sufficient accuracy for typical out-of-plain vibration modes. Wave structures were obtained by measuring waveforms at many points on the curved surface of a rail with a laser interferometer controlled by robot arms.
Publisher
日本機械学会
Japan Society of Mechanical Engineers
Source Title
日本機械学会論文集A編
Volume (Issue)
72(724)
Page
1935-1940
Date of Issued
2006-12-25
Language
English
Handle URL
https://hdl.handle.net/11094/88619
PISSN
03875008
eISSN
18848338
NCID
AN0018742X
AA11552999
Relation.isVersionOf
DOI (Publisher Version)
https://doi.org/10.1299/kikaia.72.1935
Access Rights
open access
oaire:version
Accepted Manuscript
Category
学術雑誌論文 Journal Article