Analysis of flexural mode focusing by a semianalytical finite element method

Hayashi, Takahiro; Kawashima, Koichiro; Sun, Zongqi et al.

The Journal of the Acoustical Society of America, 2003, 113(3), 1241-1248

Number of Access:291（2025-08-14 12:35 Counts）

Identifier to cite or link to this item: https://hdl.handle.net/11094/84502

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Title
Analysis of flexural mode focusing by a semianalytical finite element method
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
NRID
1000050023239 1000050023239
CreatorName
Kawashima, Koichiro
CreatorName
Sun, Zongqi
CreatorName
Rose, Joseph L.
Description
Takahiro Hayashi, Koichiro Kawashima, Zongqi Sun and Joseph L. Rose. Analysis of flexural mode focusing by a semianalytical finite element method. Journal of the Acoustical Society of America, 2003, 113(3), 1241. https://doi.org/10.1121/1.1543931.
Abstract
Focusing is one of the most promising techniques for the detection of small defects in pipe works, in which guided waves including longitudinal and flexural modes are tuned so that ultrasonic energy can be focused at a target point in a pipe, and analysis of reflected waves gives information on defects such as location and size. In this paper, the focusing technique is discussed by way of a simulation of guided wave propagation in pipe by a semianalytical finite element method (SAFE). Experiments and SAFE calculations were. compared for waveforms transmitted by a single transducer and received at different circumferential positions initially, and then the focusing phenomena were experimentally observed using focusing parameters obtained by calculations. Calculation and visualization were conducted to clarify focusing phenomena in pipe in investigating the potential of'the focusing technique. These results show that the time-reversal idea helps in understanding focusing and that resolution of focusing is strongly affected by incident waveforms as well as the number of channels available in an experiment.
Publisher
Acoustical Society of America
Source Title
The Journal of the Acoustical Society of America
Volume (Issue)
113(3)
Page
1241-1248
Date of Issued
2003-03
Language
English
Handle URL
https://hdl.handle.net/11094/84502
PISSN
00014966
NCID
AA00253792
Relation.isIdenticalTo
DOI (Publisher Version)
https://doi.org/10.1121/1.1543931
PMID
12656359
Access Rights
open access
CopyRight
Copyright 2003 Acoustical Society of America. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the Acoustical Society of America.
oaire:version
Version of Record
Category
学術雑誌論文 Journal Article