PROGRESS IN AEROELASTIC OPTIMIZATION-ANALYTICAL VERSUS NUMERICAL APPROACHES,

reportActive / Technical Report | Accession Number: AD0695057 | Need Help?

Abstract:

A summary is given of recent developments in aeroelastic optimization, with emphasis on difficulties encountered in treating examples numerically by adaptation of techniques from optimal control theory. The elementary problem of finding the unswept wing of least skin mass for fixed torsional divergence speed is used to show how a numerical transition-matrix solution is easily obtained that reproduces accurately the analytical solution. Other problems are then considered to illustrate the application of transition-matrix or gradient methods where solutions are not so easily found. An attempt is made to identify those methods most likely to be successful and to outline some of the difficulties involved in applying them to aeroelastic optimization. Author

Author(s):
Mcintosh, S. C., Jr. ; Weisshaar, T. A. ; Ashley, H.
Author Organization(s):
STANFORD UNIV CALIF DEPT OF AERONAUTICS AND ASTRONAUTICS
Supplementary Note:
Presented at the AIAA Structural Dynamics and Aeroelasticity Specialist Conference, New Orleans, La., Apr 69.
Pagination:
0045

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
SUDAAR-383, AFOSR-69-2586TR
Contract/Grant Number(s):
F44620-68-C-0036, NGR-05-020-102
Task Number(s):
978102
Project Number(s):
AF-9781
Monitor Series:
69-2586TR
 Subject Terms
Communities of Interest:
No COI(s) Identified
Descriptor(s):
*WINGS, STRUCTURAL PROPERTIES, STRUCTURAL COMPONENTS, MATHEMATICAL ANALYSIS, NUMERICAL METHODS AND PROCEDURES, WEIGHT, OPTIMIZATION, TORSION, FLUTTER, BENDING, RESONANT FREQUENCY, ASPECT RATIO, AIRFOILS, DIFFERENTIAL EQUATIONS, MATRICES(MATHEMATICS)
Field(s)/Group(s):
Aircraft, Mechanics
Keyword(s):
CONTROL THEORY, *RECTANGULAR WINGS, SKIN(STRUCTURAL MEMBER)
Report Date:
1969 Jul 01