標題: Vibration analysis of elastically restrained laminated composite sound radiation plates via a finite element approach
作者: Jiang, C. H.
Kam, T. Y.
機械工程學系
Department of Mechanical Engineering
關鍵字: Composite materials;laminated plate;natural frequency;vibration;modal analysis;finite element method;elastic support
公開日期: 2013
摘要: The vibration characteristics (natural frequencies and vibration shapes) of elastically restrained laminated composite plates used for sound radiation are studied via both theoretical and experimental approaches. The laminated composite sound radiation plates restrained by peripheral and/or interior elastic supports are excited using an electro-magnetic exciter for generating sounds. In the theoretical study, a finite element formulation is presented to model the free and forced vibrations of the elastically restrained laminated composite plate. The present finite element method is then used to study the effects of support conditions, plate aspect ratio, and size ratio of plate length to voice coil radius on the vibration characteristics of the elastically restrained laminated composite sound radiation plates. In the experimental study, several centrally restrained laminated composite plates were subjected to sweep sine excitation to determine the frequency response spectra from which the natural frequencies of the plates were identified. The elastically restrained laminated composite plates with salt powder distributed on their top surfaces were excited to generate the vibration shapes of the plates at several selected frequencies. The experimental results are then used to verify the feasibility and accuracy of the proposed finite element model. The close agreement between the experimental and theoretical results has validated the suitability of the proposed finite element model for vibration analysis of sound radiation plates. The theoretical and experimental results presented in this paper can also serve as benchmarks for verifying the correctness of any analytical model established for vibration analysis of laminated composite sound radiation plates. (C) 2013 The Authors. Published by Elsevier Ltd.
URI: http://hdl.handle.net/11536/23924
http://dx.doi.org/10.1016/j.proeng.2013.12.055
ISSN: 1877-7058
DOI: 10.1016/j.proeng.2013.12.055
期刊: 7TH ASIAN-PACIFIC CONFERENCE ON AEROSPACE TECHNOLOGY AND SCIENCE, APCATS 2013
Volume: 67
起始頁: 545
結束頁: 558
Appears in Collections:Conferences Paper


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