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Investigating Response from Turbulent Boundary Layer Excitations on a Real Launch Vehicle using SEAStatistical Energy Analysis (SEA) response has been fairly well anchored to test observations for Diffuse Acoustic Field (DAF) loading by others. Meanwhile, not many examples can be found in the literature anchoring the SEA vehicle panel response results to Turbulent Boundary Layer (TBL) fluctuating pressure excitations. This deficiency is especially true for supersonic trajectories such as those required by this nation s launch vehicles. Space Shuttle response and excitation data recorded from vehicle flight measurements during the development flights were used in a trial to assess the capability of the SEA tool to predict similar responses. Various known/measured inputs were used. These were supplemented with a range of assumed values in order to cover unknown parameters of the flight. This comparison is presented as "Part A" of the study. A secondary, but perhaps more important, objective is to provide more clarity concerning the accuracy and conservatism that can be expected from response estimates of TBL-excited vehicle models in SEA (Part B). What range of parameters must be included in such an analysis in order to land on the conservative side in response predictions? What is the sensitivity of changes in these input parameters on the results? The TBL fluid structure loading model used for this study is provided by the SEA module of the commercial code VA One.
Document ID
20090028702
Document Type
Presentation
Authors
Harrison, Phillip
(NASA Marshall Space Flight Center Huntsville, AL, United States)
LaVerde,Bruce
(Engineering Research and Consulting, Inc. Huntsville, AL, United States)
Teague, David
(Jacobs Engineering Group, Inc. Huntsville, AL, United States)
Date Acquired
August 24, 2013
Publication Date
June 9, 2009
Subject Category
Launch Vehicles And Launch Operations
Report/Patent Number
M09-0508
Meeting Information
Meeting: Spacecraft and Launch Vehicle Dynamic Environment Workshop
Location: El Segundo, CA
Country: United States
Start Date: June 9, 2009
End Date: June 11, 2009
Sponsors: Aerospace Corp.
Distribution Limits
Public
Copyright
Public Use Permitted.
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