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Analytical and experimental investigation of a 1/8-scale dynamic model of the shuttle orbiter. Volume 1: Summary reportA 1/8-scale structural dynamics model of the space shuttle orbiter was analyzed using the NASA Structural Analysis System (NASTRAN). Comparison of the calculated eigenvalues with preliminary test data for the unrestrained condition indicate that the analytical model was consistently stiffer, being about 20% higher in the first mode. The eigenvectors show reasonably good agreement with test data. A series of analytical and experimental investigations undertaken to resolve the discrepancy are described. Modifications in the NASTRAN model based upon these investigations resulted in close agreement for both eigenvalues and eigenvectors.
Document ID
19750007608
Document Type
Contractor Report (CR)
Authors
Mason, P. W.
(Grumman Aerospace Corp. Bethpage, NY, United States)
Harris, H. G.
(Grumman Aerospace Corp. Bethpage, NY, United States)
Zalesak, J.
(Grumman Aerospace Corp. Bethpage, NY, United States)
Bernstein, M.
(Grumman Aerospace Corp. Bethpage, NY, United States)
Date Acquired
September 3, 2013
Publication Date
May 1, 1974
Subject Category
Spacecraft Design, Testing And Performance
Report/Patent Number
NASA-CR-132488
Funding Number(s)
CONTRACT_GRANT: NAS1-10635
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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NameType 19750007608.pdf STI