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Vibration analysis of a 1/15 scale dynamic model of a space shuttle configurationThe natural frequencies and mode shapes of a 1/15 scale space shuttle dynamics model are analytically determined. The model, a parallel beam type structure with delta wings, is dynamically representative of the stiffness and mass properties of an early space shuttle design. Important characteristics of the model are elastic interfaces with adjustable spring rates. Normal mode computations are made using the finite element modeling technique as implemented in the NASTRAN (NASA Structural Analysis) computer program. The feasibility of neglecting elastic deformations in the lower modes was investigated using a rigid body model. Using NASTRAN, natural frequencies and mode shapes were first calculated for the booster fuselage, orbiter fuselage, and both delta wings in a free-free condition. Next, the fuselages were connected for various spring rates. Then the wings were attached to each fuselage, and the booster and orbiter were analyzed as separate airplanes. Finally, the two airplanes were elastically joined, and the complete model was analyzed.
Document ID
19720005222
Document Type
Contractor Report (CR)
Authors
Thornton, E. A.
(Old Dominion Univ. Norfolk, VA, United States)
Date Acquired
September 2, 2013
Publication Date
January 1, 1971
Subject Category
Space Vehicles
Report/Patent Number
NASA-CR-111984
Funding Number(s)
CONTRACT_GRANT: NAS1-0434-20
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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