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Exploring Modeling Options and Conversion of Average Response to Appropriate Vibration Envelopes for a Typical Cylindrical Vehicle Panel with Rib-stiffened DesignAlthough applications for Statistical Energy Analysis (SEA) techniques are more widely used in the aerospace industry today, opportunities to anchor the response predictions using measured data from a flight-like launch vehicle structure are still quite valuable. Response and excitation data from a ground acoustic test at the Marshall Space Flight Center permitted the authors to compare and evaluate several modeling techniques available in the SEA module of the commercial code VA One. This paper provides an example of vibration response estimates developed using different modeling approaches to both approximate and bound the response of a flight-like vehicle panel. Since both vibration response and acoustic levels near the panel were available from the ground test, the evaluation provided an opportunity to learn how well the different modeling options can match band-averaged spectra developed from the test data. Additional work was performed to understand the spatial averaging of the measurements across the panel from measured data. Finally an evaluation/comparison of two conversion approaches from the statistical average response results that are output from an SEA analysis to a more useful envelope of response spectra appropriate to specify design and test vibration levels for a new vehicle.
Document ID
Acquisition Source
Marshall Space Flight Center
Document Type
Harrison, Phil
(NASA Marshall Space Flight Center Huntsville, AL, United States)
LaVerde, Bruce
(ERC International, Inc. United States)
Teague, David
(Jacobs Technology Inc. United States)
Date Acquired
August 24, 2013
Publication Date
June 9, 2009
Subject Category
Aircraft Design, Testing And Performance
Report/Patent Number
Meeting Information
Meeting: Spacecraft and Launch Vehicle Dynamic Environments Workshop
Location: El Segundo, CA
Country: United States
Start Date: June 9, 2009
End Date: June 11, 2009
Sponsors: Jet Propulsion Lab., California Inst. of Tech., Aerospace Corp.
Distribution Limits
Public Use Permitted.
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