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Analytical comparison of three stiffened panel conceptsThree stiffened panel concepts are evaluated to find optimized designs for integral stiffeners in the barrels of Reusable Launch Vehicle fuel tanks. The three panel concepts considered are a T-stiffened panel, a panel with one blade stiffener centered between each pair of T-stiffeners, and a panel with two blade stiffeners equally spaced between each pair of T-stiffeners. The panels are optimized using PASCO for a range of compressive loads, and the computed areal weight for each panel is used to compare the concepts and predict tank weights. The areal weight of the T-stiffened panel with one blade is up to seven-percent lower than the other panel concepts. Two tank construction methods are compared for a representative tank design with three barrels. In the first method, 45-degree circumferential sections of a barrel are each designed to carry the same maximum load in the barrel. In the second method, each barrel section is designed for the maximum load in that section. Representative tanks designed with the first method are over 250 lb heavier than tanks designed using the second method. Optimized panel designs and areal weights are also computed for variation of the nominal panel length and skin thickness.
Document ID
19960012497
Acquisition Source
Legacy CDMS
Document Type
Technical Memorandum (TM)
Authors
Maloney, Jill M. (NASA Langley Research Center Hampton, VA, United States)
Wu, K. Chauncey (NASA Langley Research Center Hampton, VA, United States)
Robinson, James C. (Analytical Services and Materials, Inc. Hampton, VA., United States)
Date Acquired
September 6, 2013
Publication Date
December 1, 1995
Subject Category
Structural Mechanics
Report/Patent Number
NASA-TM-110165
NAS 1.15:110165
NIPS-96-08490
Accession Number
96N18734
Funding Number(s)
PROJECT: RTOP 242-10-01-01
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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