Paper Abstract and Keywords |
Presentation |
2007-10-25 14:10
Existence of Negative Group Velocity of Coupling Modes of Leaky Lamb Waves in a Solid/Liquid/Solid Layer Kojiro Nishimiya, Koichi Mizutani, Naoto Wakatsuki (Tsukuba Univ.), Ken Yamamoto (Kansai Univ.) US2007-66 |
Abstract |
(in Japanese) |
(See Japanese page) |
(in English) |
Lamb wave is a type of elastic waves and it has negative group velocities that the energy transport is in the opposite direction to the phase velocity in certain conditions. It is known that the negative group velocity depends only Poisson's ratio. In our previous research, it was identified that the negative group velocity of coupling modes of leaky Lamb waves in a glass/water/glass layer can be changed by only the thickness of water layer. Particularly, when dW/d (dW: thickness of water layer, d: thickness of elastic plates) is 0.016 in GS-S1 mode, the negative group velocity takes a minimum value. In this paper, the existence of negative group velocity is obtained in this condition by changing the material of solid, quantitatively. In this result, it was identified the negative group velocities of coupling modes of Leaky Lamb waves propagating in a solid/liquid/solid layer depend not only Poisson's ratio but also the density of the elastic plates. |
Keyword |
(in Japanese) |
(See Japanese page) |
(in English) |
Lamb wave / coupling mode of leaky Lamb wave / negative group velocity / phase velocity / / / / |
Reference Info. |
IEICE Tech. Rep., vol. 107, no. 284, US2007-66, pp. 9-12, Oct. 2007. |
Paper # |
US2007-66 |
Date of Issue |
2007-10-19 (US) |
ISSN |
Print edition: ISSN 0913-5685 Online edition: ISSN 2432-6380 |
Copyright and reproduction |
All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034) |
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US2007-66 |
Conference Information |
Committee |
US |
Conference Date |
2007-10-25 - 2007-10-26 |
Place (in Japanese) |
(See Japanese page) |
Place (in English) |
Meiji Univ. (Akihabara) |
Topics (in Japanese) |
(See Japanese page) |
Topics (in English) |
Sono-Physics, General |
Paper Information |
Registration To |
US |
Conference Code |
2007-10-US |
Language |
Japanese |
Title (in Japanese) |
(See Japanese page) |
Sub Title (in Japanese) |
(See Japanese page) |
Title (in English) |
Existence of Negative Group Velocity of Coupling Modes of Leaky Lamb Waves in a Solid/Liquid/Solid Layer |
Sub Title (in English) |
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Keyword(1) |
Lamb wave |
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coupling mode of leaky Lamb wave |
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negative group velocity |
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phase velocity |
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1st Author's Name |
Kojiro Nishimiya |
1st Author's Affiliation |
Tsukuba University (Tsukuba Univ.) |
2nd Author's Name |
Koichi Mizutani |
2nd Author's Affiliation |
Tsukuba University (Tsukuba Univ.) |
3rd Author's Name |
Naoto Wakatsuki |
3rd Author's Affiliation |
Tsukuba University (Tsukuba Univ.) |
4th Author's Name |
Ken Yamamoto |
4th Author's Affiliation |
Kansai University (Kansai Univ.) |
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Speaker |
Author-1 |
Date Time |
2007-10-25 14:10:00 |
Presentation Time |
20 minutes |
Registration for |
US |
Paper # |
US2007-66 |
Volume (vol) |
vol.107 |
Number (no) |
no.284 |
Page |
pp.9-12 |
#Pages |
4 |
Date of Issue |
2007-10-19 (US) |
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