关键词: 机械产品, 非概率可靠性, 区间扩张, 仿射变换, 区间分割

Abstract: To solve the interval expansion problem caused by interval algorithm in non-probabilistic reliability analysis,a response surface analysis method based on interval affine transformation was proposed.According to the mapping relationship between interval parameter and affine form,the interval affine response surface was constructed to suppress the interval expansion.To obtain a more accurate response interval,the update and solution mechanism for models was established through the interval boundary segmentation and combination,which could modify the output response layer by layer,and the non-probabilistic reliability index was solved by interval affine response surface.The numerical and engineering cases were used to demonstrate the feasibility and validity of the method proposed.

Key words: mechanical product, non-probabilistic reliability, interval expansion, affine transformation, interval segmentation