Wave structure analysis of guided waves in a bar with an arbitrary cross-section

Hayashi, Takahiro; Tamayama, Chiga; Murase, Morimasa

Ultrasonics, 2006, 44(1), 17-24

Number of Access:335（2025-08-14 01:29 Counts）

Identifier to cite or link to this item: https://hdl.handle.net/11094/84496

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Title
Wave structure analysis of guided waves in a bar with an arbitrary cross-section
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
Hayashi, Takahiro
CreatorName
Tamayama, Chiga
CreatorName
Murase, Morimasa
Subject
Guided wave
Dispersion curve
Wave structure
Semi-analytical finite element method
Abstract
Both dispersion curves and wave structures, which are displacement distributions on a bar cross-section, are essential for guided wave NDEs. Theoretical dispersion curves and wave structures for a bar with an arbitrary cross-section are derived in this paper using a special modeling technique called the semi-analytical finite element method (SAFEM). The guidelines for guided wave NDEs of bar-like structures are also shown based on wave structure and modal analysis. First, the relationship between the dispersion curves and their corresponding wave structures were obtained for a square rod. Modes with longitudinal vibration have higher group velocities and torsional modes have constant phase and group velocities. Next, the relationship between the dispersion curves and wave structures for a rail are detailed. The rail is used to represent a bar with a complex cross-section. Similar to the square rod results, the rail's longitudinal modes have higher group velocities. However, the rail contains modes with local vibration. Finally, single mode detection and excitation techniques are introduced. A single mode can be obtained by detecting and exciting with a weighted function that corresponds to a specific mode's wave structure.
Publisher
Elsevier Ltd
Source Title
Ultrasonics
Volume (Issue)
44(1)
Page
17-24
Date of Issued
2006-01
Language
English
Handle URL
https://hdl.handle.net/11094/84496
PISSN
0041624X
NCID
AA00876332
Relation.isVersionOf
DOI (Publisher Version)
https://doi.org/10.1016/j.ultras.2005.06.006
Access Rights
open access
CopyRight
© 2005 Elsevier B.V. This manuscript version is made available under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
oaire:version
Accepted Manuscript
Category
学術雑誌論文 Journal Article