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Vibroacoustic Response of the NASA ACTS Spacecraft Antenna to Launch Acoustic ExcitationThe Advanced Communications Technology Satellite was an experimental NASA satellite launched from the Space Shuttle Discovery. As part of the ground test program, the satellite s large, parabolic reflector antennas were exposed to a reverberant acoustic loading to simulate the launch acoustics in the Shuttle payload bay. This paper describes the modelling and analysis of the dynamic response of these large, composite spacecraft antenna structure subjected to a diffuse acoustic field excitation. Due to the broad frequency range of the excitation, different models were created to make predictions in the various frequency regimes of interest: a statistical energy analysis (SEA) model to capture the high frequency response and a hybrid finite element-statistical energy (hybrid FE-SEA) model for the low to mid-frequency responses. The strengths and limitations of each of the analytical techniques are discussed. The predictions are then compared to the measured acoustic test data and to a boundary element (BEM) model to evaluate the performance of the hybrid techniques.
Document ID
20090007959
Acquisition Source
Glenn Research Center
Document Type
Technical Memorandum (TM)
Authors
Larko, Jeffrey M.
(NASA Glenn Research Center Cleveland, OH, United States)
Cotoni, Vincent
(ESI US Research and Development, Inc. San Diego, CA, United States)
Date Acquired
August 24, 2013
Publication Date
December 1, 2008
Subject Category
Spacecraft Design, Testing And Performance
Report/Patent Number
NASA/TM-2008-215168
E-16407
Distribution Limits
Public
Copyright
Public Use Permitted.
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