MULTIDISCIPLINARY OPTIMIZATION OF COMPOSITE WINGS USING REFINED STRUCTURAL AND AEROELASTIC ANALYSIS METHODOLOGIES

Aditi Chattopadhyay, Ratneshwar Jha

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

An integrated multidisciplinary procedure has been developed for structural and aeroelastic optimization of composite wings based on refined analysis technique. A refined higher-order theory is used to analyze composite box beam, which represents the load carrying member of the wing. Unsteady aerodynamic computations are performed using a panel code based on the Doublet Lattice Method. Flutter/divergence dynamic pressure is obtained by the Laplace domain method through rational function approximation of unsteady aerodynamic loads. The objective of the optimization procedure is to minimize wing structural weight with constraints on flutter/divergence speed and stresses at the root due to the static load. Composite ply orientations and laminate thicknesses are used as design variables. The Kreisselmeier-Steinhauser function approach is used to efficiently integrate the objective function and constraints into a single envelope function. The resulting unconstrained optimization problem is solved using the Davidon-Fletcher-Powell algorithm. Numerical results are presented showing significant improvements, after optimization, compared to a reference design.

Original languageEnglish (US)
Title of host publication4th International Symposium on Fluid-Structure Interactions, Aeroelasticity, Flow-Induced Vibration and Noise
Subtitle of host publicationVolume III
PublisherAmerican Society of Mechanical Engineers (ASME)
Pages175-183
Number of pages9
ISBN (Electronic)9780791826775
DOIs
StatePublished - 1997
EventASME 1997 International Mechanical Engineering Congress and Exposition, IMECE 1997 - 4th International Symposium on Fluid-Structure Interactions, Aeroelasticity, Flow-Induced Vibration and Noise - Dallas, United States
Duration: Nov 16 1997Nov 21 1997

Publication series

NameASME International Mechanical Engineering Congress and Exposition, Proceedings (IMECE)
Volume1997-C

Conference

ConferenceASME 1997 International Mechanical Engineering Congress and Exposition, IMECE 1997 - 4th International Symposium on Fluid-Structure Interactions, Aeroelasticity, Flow-Induced Vibration and Noise
Country/TerritoryUnited States
CityDallas
Period11/16/9711/21/97

ASJC Scopus subject areas

  • Mechanical Engineering

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