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A user's guide to the SUDAN computer program for determining the vibration modes of structural systemsThe use of the SUDAN computer program for analyzing structural systems for their natural modes and frequencies of vibration is described. SUDAN is intended for structures which can be represented as an equivalent system of beam, spring, and rigid-body substructures. User-written constraint equations are used to analytically join the mass and stiffness matrices of the substructures to form the mass and stiffness matrices of the complete structure from which all the frequencies and modes of the system are determined. The SUDAN program can treat the case in which both the mass and stiffness matrices of the coupled system may be singular simultaneously. A general description of the FORTRAN IV program is given, the computer hardware and software specifications are indicated, and the input required by the program is described.
Document ID
19790006243
Acquisition Source
Legacy CDMS
Document Type
Thesis/Dissertation
Authors
Kvaternik, R. G. (NASA Langley Research Center Hampton, VA, United States)
Durling, B. J. (NASA Langley Research Center Hampton, VA, United States)
Date Acquired
September 3, 2013
Publication Date
November 1, 1978
Subject Category
Structural Mechanics
Report/Patent Number
NASA-TM-78765
Accession Number
79N14414
Funding Number(s)
PROJECT: RTOP 505-10-23-03
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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