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Steady, Oscillatory, and Unsteady Subsonic and Supersonic Aerodynamics, production version (SOUSSA-P 1.1). Volume 1: Theoretical manualRecent developments of the Green's function method and the computer program SOUSSA (Steady, Oscillatory, and Unsteady Subsonic and Supersonic Aerodynamics) are reviewed and summarized. Applying the Green's function method to the fully unsteady (transient) potential equation yields an integro-differential-delay equation. With spatial discretization by the finite-element method, this equation is approximated by a set of differential-delay equations in time. Time solution by Laplace transform yields a matrix relating the velocity potential to the normal wash. Premultiplying and postmultiplying by the matrices relating generalized forces to the potential and the normal wash to the generalized coordinates one obtains the matrix of the generalized aerodynamic forces. The frequency and mode-shape dependence of this matrix makes the program SOUSSA useful for multiple frequency and repeated mode-shape evaluations.
Document ID
19800017770
Acquisition Source
Legacy CDMS
Document Type
Contractor Report (CR)
Authors
Morino, L. (Aerospace Systems, Inc. Burlington, MA, United States)
Date Acquired
September 4, 2013
Publication Date
January 1, 1980
Subject Category
Aerodynamics
Report/Patent Number
NASA-CR-159130
ASI-TR-78-45-VOL-1
Accession Number
80N26269
Funding Number(s)
PROJECT: RTOP 505-33-53-01
CONTRACT_GRANT: NAS1-14977
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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