Title
Experimental modal testing using pressurized air excitation Experimental modal testing using pressurized air excitation
Author
Faculty/Department
Faculty of Applied Engineering Sciences
Publication type
article
Publication
London ,
Subject
Engineering sciences. Technology
Source (journal)
Journal of sound and vibration / University of Southampton. Institute of Sound and Vibration Research. - London
Volume/pages
299(2007) :1-2 , p. 83-98
ISSN
0022-460X
ISI
000241661300007
Carrier
E
Target language
English (eng)
Full text (Publishers DOI)
Abstract
Non-fixed excitation methods are often needed in modal analysis (for instance in quality control applications). Several non-fixed methods exist to perform this task: impact hammer, electro-magnetic, acoustic and laser excitation. In this article the use of pneumatic excitation using an impinging air jet is proposed as an alternative. Through a detailed experimental study it is shown that forces up to 0.6N can be attained, while with the current valve technology one can excite up to 1 kHz. Two application cases are considered: a modal analysis of a cantilevered beam and a vibration test of a hard disk. (c) 2006 Elsevier Ltd. All rights reserved.
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