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Analytical and experimental studies of natural vibrations modes of ring-stiffened truncated-cone shells with variable theoretical ring fixityExperimental and analytical investigations of the vibratory behavior of ring-stiffened truncated-cone shells are described. Vibration tests were conducted on 60 deg conical shells having up to four ring stiffeners and for free-free and clamped-free edge constraints and 9 deg conical shells, for two thicknesses, each with two angle rings and for free-free, free-clamped, and clamped-clamped edge constraints. The analytical method is based on linear thin shell theory, employing the Rayleigh-Ritz method. Discrete rings are represented as composed of one or more segments, each of which is a short truncated-cone shell of uniform thickness. Equations of constraint are used to join a ring and shell along a circumferential line connection. Excellent agreement was obtained for comparisons of experimental and calculated frequencies.
Document ID
19720003305
Acquisition Source
Legacy CDMS
Document Type
Other - NASA Technical Note (TN)
Authors
Naumann, E. C. (NASA Langley Research Center Hampton, VA, United States)
Catherines, D. S. (NASA Langley Research Center Hampton, VA, United States)
Walton, W. C., Jr. (NASA Langley Research Center Hampton, VA, United States)
Date Acquired
September 2, 2013
Publication Date
October 1, 1971
Subject Category
Structural Mechanics
Report/Patent Number
L-7228
NASA-TN-D-6473
Accession Number
72N10954
Funding Number(s)
PROJECT: RTOP 114-08-13-04
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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