Optimization of airplane wing structures under gust loads

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

A methodology is presented for the optimum design of aircraft wing structures subjected to gust loads. The equations of motion, in the form of coupled integro-differential equations, are solved numerically and the stresses in the aircraft wing structure are found for a discrete gust encounter. The gust is assumed to be one minus cosine type and uniform along the span of the wing. In order to find the behavior of the wing structure under gust loads and also to obtain a physical insight into the nature of the optimum solution, the design of the typical section (symmetric double wedge airfoil) is studied by using a graphical procedure. Then a more realistic wing optimization problem is formulated as a constrained nonlinear programming problem based on finite element modeling and the optimum solution is found by using the interior penalty function method. A sensitivity analysis is conducted to find the effects of changes in design variables about the optimum point on the response quantities of the wing structure.

Original languageEnglish
Pages (from-to)741-749
Number of pages9
JournalComputers and Structures
Volume21
Issue number4
DOIs
StatePublished - Jan 1 1985
Externally publishedYes

Fingerprint

Wind effects
Aircraft
Optimization
Interior Penalty
Penalty Function Method
Finite Element Modeling
Airfoil
Wedge
Nonlinear Programming
Integro-differential Equation
Sensitivity Analysis
Equations of Motion
Integrodifferential equations
Nonlinear programming
Optimization Problem
Airfoils
Sensitivity analysis
Equations of motion
Methodology
Design

ASJC Scopus subject areas

  • Computer Science Applications
  • Computational Mechanics

Cite this

Optimization of airplane wing structures under gust loads. / Rao, Singiresu S.

In: Computers and Structures, Vol. 21, No. 4, 01.01.1985, p. 741-749.

Research output: Contribution to journalArticle

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