Evolutionary multicriteria design optimization of integrally stiffened airframe structures

被引：0
|
作者：
Hansen, Lars U. [1 ,2 ]
Häusler, Sascha M. [1 ,2 ]
Horst, Peter [1 ,2 ]
机构：
[1] Technical University of Brunswick, 38108 Braunschweig, Germany
[2] Institute of Aircraft Design and Lightweight Structures, Hermann-Blenk-Street 35, Germany
来源：
Journal of Aircraft | 1600年 / 45卷 / 06期
关键词：
In industrial practice; innovative structural aircraft design is; on the one hand; driven by several design criteria like static stress; damage tolerance; and stability; and; on the other hand; by new manufacturing methods and materials; which promise beneficial effects on manufacturing costs and weight. Published optimization approaches are mostly based on pure static stress criteria; albeit the important influence of stability and damage tolerance is neglected. This assumption is perilous but significantly simplifies the investigation. The investigation of unconventional designs under consideration of the preceding criteria is challenging because no analytical or handbook solutions are available. This paper introduces an optimization approach based on an evolution strategy; which incorporates multiple criteria by using nonlinear finite-element analyses for stability and a set of linear analyses for damage-tolerance evaluation. To demonstrate the approach; one design investigation is presented for the window area of a generic aircraft fuselage. The definition of dimensions and the choice of an ¡deal topology define the optimization problem. The chosen fuselage structure uses an integral design with an innovative combination of window and circumferential frame and is investigated with regard to three load cases that represent relevant in-flight conditions derived from global finite-element analyses. Copyright © 2008 by the American Institute of Aeronautics and Astronautics; inc. All rights reserved;
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页码：1881 / 1889
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