NASA Logo, External Link
Facebook icon, External Link to NASA STI page on Facebook Twitter icon, External Link to NASA STI on Twitter YouTube icon, External Link to NASA STI Channel on YouTube RSS icon, External Link to New NASA STI RSS Feed AddThis share icon
 

Record Details

Record 40 of 2564
Impact of Acoustic Standing Waves on Structural Responses
External Online Source: hdl:2014/45487
Author and Affiliation:
Kolaini, Ali R.(Jet Propulsion Lab., California Inst. of Tech., Pasadena, CA, United States)
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.
Publication Date: Mar 25, 2014
Document ID:
20160005618
(Acquired May 02, 2016)
Subject Category: ACOUSTICS
Document Type: Conference Paper
Meeting Information: Aerospace Testing Seminar; 28th; 25-27 Mar. 2014; Los Angeles, CA; United States
Meeting Sponsor: NASA; Washington, DC, United States
Financial Sponsor: Jet Propulsion Lab., California Inst. of Tech.; Pasadena, CA, United States
Description: 7p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright
NASA Terms: ACOUSTIC PROPERTIES; STANDING WAVES; SOLAR ARRAYS; SOUND WAVES; FIELD TESTS; AEROSPACE INDUSTRY; REFLECTORS; FABRICATION
Other Descriptors: REVERBERANT ACOUSTIC FIELD; DIRECT ACOUSTIC FIELD; SPEAKERS; VIBRO-ACOUSTIC; ACOUSTIC/STRUCTURAL MODAL COUPLING
Availability Source: Other Sources
› Back to Top
Find Similar Records
NASA Logo, External Link
NASA Official: Gerald Steeman
Site Curator: STI Program
Last Modified: May 02, 2016
Contact Us