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A computerized method for calculating flutter characteristics of a system characterized by two degrees of freedomA formulation is given for calculating flutter frequency and flutter speed for a problem with two degrees of freedom. Two different solutions for evaluating the flutter determinant are presented and the results for each method are compared. A program flow diagram, partial program listing, and a sample problem with input and output for the two different methods are included. Although the method was developed for computing flutter characteristics of a pylon installed in the NASA Langley VSTOL tunnel, it is sufficiently general to solve any flutter system that can be characterized by two degrees of freedom.
Document ID
19800005799
Acquisition Source
Legacy CDMS
Document Type
Technical Memorandum (TM)
Authors
Stalnaker, W. A. (NASA Langley Research Center Hampton, VA, United States)
Hunter, W. F. (NASA Langley Research Center Hampton, VA, United States)
Date Acquired
September 4, 2013
Publication Date
November 1, 1979
Subject Category
Aerodynamics
Report/Patent Number
NASA-TM-80153
Accession Number
80N14055
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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