Title
Operational Acoustic Modal Analysis : sensitivity-based mode shape normalisationOperational Acoustic Modal Analysis : sensitivity-based mode shape normalisation
Author
Faculty/Department
Faculty of Applied Engineering Sciences
Publication type
article
Publication
Subject
Engineering sciences. Technology
Source (journal)
Acta acustica united with acustica
Volume/pages
94(2008):4, p. 580-587
ISSN
1610-1928
ISI
000258950400009
Carrier
E
Target language
English (eng)
Full text (Publishers DOI)
Abstract
Nowadays Acoustic Modal Analysis often plays it significant role ill the optimisation process of the acoustic parameters of all kinds of cavities. e.g. the interior of a car, a train, an airplane etc. A problem with the existing experimental Acoustic Modal Analysis techniques is that one has to use volume acceleration sources which interact with the acoustic system. The Operational Acoustic Modal Analysis (OAMA) technique doesn't suffer from this problem. An important disadvantage of the OAMA approach is that the estimated mode shapes are not correctly scaled. This scaling problem will be tackled in this paper. We will introduce a sensitivity based rescaling technique for the acoustic domain. Local Volume changes of the cavity will make a correct estimate of the mode shapes possible. The technique will be validated by some simulations and experiments.
E-info
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