Abstract
Polynomial chaos expansion (PCE) method has better fitting capacity and rate of convergence than other traditional reliability analysis methods. This paper presents the failure correlation reliability analysis based on PCE for improving calculation precision and reducing computational cost. An example of solid rocket motor grain solidification and cooling is analyzed, and the failure correlation reliability between inner surface crack and insulation layer debonding is studied. Results show that an accurate failure correlation reliability analysis result can be obtained by proposed method, and the precision and efficiency of the proposed method are verified by comparing it with traditional methods.
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