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Title: Vibro-acoustic characteristics of a plate under Duffing oscillator's excitation
Authors: Zhou, Qi-Zheng1; Wang, De-Shi1
Author affiliation: 1 Department of Weaponry Engineering, Naval University of Engineering, Wuhan, China
Corresponding author: Wang, De-Shi
Source title: Zhendong yu Chongji/Journal of Vibration and Shock
Abbreviated source title: J Vib Shock
Volume: 34
Issue: 6
Issue date: March 28, 2015
Publication year: 2015
Pages: 122-126
Language: Chinese
ISSN: 10003835
Document type: Journal article (JA)
Publisher: Chinese Vibration Engineering Society
Abstract: Aiming at the acoustic radiation problem of a structure under nonlinear vibration excitations, the vibro-acoustic coupled dynamic equations of a plate under Duffing oscillator's excitation were derived based on the variational principle. The approximately analytical solution to the coupled equations in light liquid was obtained with the modal expansion and incremental harmonic balance method (IHBM). The expressions of the average vibration velocity of the plate surface and the acoustic radiation power under multi-frequency also were derived. Then, the influences of excitation frequency and nonlinear stiffness on the nonlinear vibration and acoustic radiation of the plate were investigated. The results showed that the vibro-acoustic coupled problem of the plate under Duffing oscillator's excitation is a complex dynamic problem containing discrete and continuous systems; there are second jump phenomena and new resonant characters in Duffing oscillator's motion; the vibro-acoustic characteristics of the plate depends upon the third harmonic component. The results provided a theoretical base for the vibro-acoustic design of vibration isolation structures. ©, 2015, Chinese Vibration Engineering Society. All right reserved.
Number of references: 9
Main heading: Vibrations (mechanical)
Controlled terms: Acoustic emissions - Acoustic radiators - Acoustic wave propagation - Acoustic wave transmission - Acoustic waves - Nonlinear equations - Oscillators (mechanical) - Plates (structural components) - Plating - Variational techniques
Uncontrolled terms: Acoustic radiation power - Duffing oscillator - IHBM - Incremental harmonic balance method - Nonlinear excitation - Third harmonic components - Vibration isolation structure - Vibroacoustic characteristics
Classification code: 408.2 Structural Members and Shapes - 539.3 Metal Plating - 601.1 Mechanical Devices - 751.1 Acoustic Waves - 751.2 Acoustic Properties of Materials - 752.4 Acoustic Generators - 921.1 Algebra - 921.2 Calculus - 931.1 Mechanics
DOI: 10.13465/j.cnki.jvs.2015.06.023
Database: Compendex
Compilation and indexing terms, © 2015 Elsevier Inc.

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