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Impact of acoustic standing waves on structural responses

Show simple item record Kolaini, Ali R. 2016-04-13T17:31:47Z 2016-04-13T17:31:47Z 2014-03-25
dc.identifier.citation Aerospace Testing Seminar, Los Angeles, California, March 25-27, 2014 en_US
dc.identifier.clearanceno 14-1019
dc.description.abstract For several decades large reverberant chambers and most recently direct field acoustic testing have been used in the aerospace industry to test larger structures with low surface densities such as solar arrays and reflectors to qualify them and to detect faults in the design and fabrication. It has been reported that in reverberant chamber and direct acoustic testing, standing acoustic modes may strongly couple with the fundamental structural modes of the test hardware (Reference 1). In this paper results from a recent reverberant chamber acoustic test of a composite reflector are discussed. These results provide further convincing evidence of the acoustic standing wave and structural modes coupling phenomenon. The purpose of this paper is to alert test organizations to this phenomenon so that they can account for the potential increase in structural responses and ensure that flight hardware undergoes safe testing. An understanding of the coupling phenomenon may also help minimize the over and/or under testing that could pose un-anticipated structural and flight qualification issues. en_US
dc.description.sponsorship NASA/JPL en_US
dc.language.iso en_US en_US
dc.publisher Pasadena, CA : Jet Propulsion Laboratory, National Aeronautics and Space Administration, 2014 en_US
dc.subject Reverberant acoustic field en_US
dc.subject direct acoustic field en_US
dc.subject speakers en_US
dc.subject vibro-acoustic en_US
dc.subject acoustic/structural modal coupling en_US
dc.title Impact of acoustic standing waves on structural responses en_US
dc.type Preprint en_US

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