Enhancements of energy and Q-factor of a nonlinear resonator with increase in its losses

Document type: Journal Articles
Article type: Original article
Peer reviewed: Yes
Full text:
Author(s): Oleg Rudenko, A.L. Sobisevich, L.E. Sobisevich, Claes Hedberg
Title: Enhancements of energy and Q-factor of a nonlinear resonator with increase in its losses
Translated title: Förstärkning av energi och Q-faktor hos en ickelinjär resonator genom ökning av dess förluster
Journal: Doklady Physics / Doklady Akademii Nauk
Year: 2002
Volume: 383
Issue: 1
Pagination: 330-333
ISSN: 0869-5652
Publisher: MAIK Nauka/Interperiodica Publishing, Russia
Organization: Blekinge Institute of Technology
Department: Dept. of Mechanical Engineering (Institutionen för maskinteknik)
Dept. of Mechanical Engineering S-371 79 Karlskrona
+46 455 38 50 00
Authors e-mail: claes.hedberg@bth.se
Language: English
Abstract: A phenomenon that is paradoxical at first sight is studied: an appropriately-organized energy outflow from a resonator cavity results not in the attenuation of nonlinear vibrations but in their noticeable enhancement. An increase in the resonator Q-factor and in the energy accumulated in it is well pronounced when the frequencies of the higher harmonics generated in a nonlinear medium are close to the natural frequencies of the resonator. An important example of a nonlinear system with the necessary properties is an acoustic resonator with selective losses.
Summary in Swedish: Det paradoxala beteendet att en resonators enegriinnehåll och Q-faktor kan öka när dess dämpning ökar beskrivs.
Subject: Mechanical Engineering\Structural Dynamics
Mechanical Engineering\General
Keywords: nonlinear acoustics, resonator, Q-factor increase, acoustic resonance