Reliability-based design optimization of stiffened panels

Author

Qu, Xueyong ; Haftka, Raphael T.

Author_Institution

Dept. of Mech. & Aerosp. Eng., Florida Univ., Gainesville, FL

fYear

2003

fDate

24-24 Sept. 2003

Firstpage

292

Lastpage

297

Abstract

We explore reliability-based designs of isogrid stiffened panels. Uncertainties in material properties and geometric manufacturing uncertainties are represented by random variables. Due to the multiple failure modes in the stiffened panels, polynomial response surface approximation are fit to the most critical safety margins in the panel. Probability of failure is calculated by Monte Carlo simulation using the polynomial response surfaces. A probabilistic sufficiency factor approach is employed to facilitate the design optimization

Keywords

Monte Carlo methods; computational geometry; failure analysis; materials properties; optimisation; polynomial approximation; probability; product design; reliability; response surface methodology; uncertainty handling; Monte Carlo simulation; critical safety margins; design optimization; geometric manufacturing uncertainties; isogrid stiffened panels; material properties; polynomial response surface approximation; probabilistic sufficiency factor approach; random variables; reliability-based designs failure probability; Design optimization; Manufacturing; Material properties; Polynomials; Probability; Random variables; Response surface methodology; Safety; Surface fitting; Uncertainty;

fLanguage

English

Publisher

ieee

Conference_Titel

Uncertainty Modeling and Analysis, 2003. ISUMA 2003. Fourth International Symposium on

Conference_Location

College Park, MD

Print_ISBN

0-7695-1997-0

Type

conf

DOI

10.1109/ISUMA.2003.1236176

Filename

1236176