关键词: 可靠性分析, 可靠性设计, 翼盒结构

Abstract: The methods of system reliability analysis and optimization for wing-box structures are studied in this paper. The optimility criterion method is adopted to enumerate the significant failure modes and Feng's method with high accuracy is used for computing system failure probability. Two iterative formulae are presented to minimize the structural weight. The illustrative examples show that these methods are very efficient, especially for medium and large scale structures.

Key words: reliability analysis, optimization design, wing-box structures