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Paper Abstract and Keywords
Presentation 2026-05-12 14:00
Determination of nonlinear coefficients at resonance and anti-resonance of admittance curve measured under constant current amplitude
Naruhiro Iwama (The Univ. of Tokyo), Tatsuki Sasamura (Lund Univ.), Ryuichi Arakawa, Asuka Tsujii, Takashi Kasashima (Niterra), Wei Qiu (Lund Univ.), Takeshi Morita (The Univ. of Tokyo) US2026-5
Abstract (in Japanese) (See Japanese page) 
(in English) The nonlinear effects of piezoelectric materials can be analysed by introducing higher-order elastic coefficients into the piezoelectric equations, and their values can be determined by curve fitting the admittance curve in which the nonlinear effects occur. In conventional admittance curves measured under constant voltage amplitude conditions, changes due to nonlinear effects are clearly visible only near the resonance frequency. However, under constant current amplitude conditions, the voltage becomes maximum at the anti-resonant frequency, and therefore the vibration velocity becomes also maximum. As a result, changes due to nonlinear effects appear not only at the resonance frequency but also around the anti-resonant frequency. In this study, we determined higher-order elastic coefficients using the resonance and anti-resonance peaks of admittance curves measured under constant current amplitude, and by comparing them, we confirmed that nonlinearities other than mechanical elasticity are sufficiently small, and that the piezoelectric nonlinear model is valid.
Keyword (in Japanese) (See Japanese page) 
(in English) Piezoelectric nonlinearity / Higher-order elasticity / Transfer matrix method / Constant current / / / /  
Reference Info. IEICE Tech. Rep., vol. 126, no. 14, US2026-5, pp. 21-25, May 2026.
Paper # US2026-5 
Date of Issue 2026-05-05 (US) 
ISSN 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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Conference Information
Committee US  
Conference Date 2026-05-12 - 2026-05-12 
Place (in Japanese) (See Japanese page) 
Place (in English) Surugadai Campus, Nihon University 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Nonlinear acoustics, Ultrasonics, etc. 
Paper Information
Registration To US 
Conference Code 2026-05-US 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Determination of nonlinear coefficients at resonance and anti-resonance of admittance curve measured under constant current amplitude 
Sub Title (in English)  
Keyword(1) Piezoelectric nonlinearity  
Keyword(2) Higher-order elasticity  
Keyword(3) Transfer matrix method  
Keyword(4) Constant current  
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1st Author's Name Naruhiro Iwama  
1st Author's Affiliation The University of Tokyo (The Univ. of Tokyo)
2nd Author's Name Tatsuki Sasamura  
2nd Author's Affiliation Lund University (Lund Univ.)
3rd Author's Name Ryuichi Arakawa  
3rd Author's Affiliation Niterra Co., Ltd. (Niterra)
4th Author's Name Asuka Tsujii  
4th Author's Affiliation Niterra Co., Ltd. (Niterra)
5th Author's Name Takashi Kasashima  
5th Author's Affiliation Niterra Co., Ltd. (Niterra)
6th Author's Name Wei Qiu  
6th Author's Affiliation Lund University (Lund Univ.)
7th Author's Name Takeshi Morita  
7th Author's Affiliation The University of Tokyo (The Univ. of Tokyo)
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Speaker Author-1 
Date Time 2026-05-12 14:00:00 
Presentation Time 25 minutes 
Registration for US 
Paper # US2026-5 
Volume (vol) vol.126 
Number (no) no.14 
Page pp.21-25 
#Pages 5 
Date of Issue 2026-05-05 (US) 

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