Practical engineering method for fuzzy reliability analysis of mechanical structures

被引：50

作者：

Bing, Li ^{[1
]}

Meilin, Zhu ^{[1
]}

Kai, Xu ^{[1
]}

机构：

[1] Department of Power Engineering, Rm. 102, No. 2 E. 3 Block, H., Wuhan, China

来源：

| 2000年 / Elsevier Science Ltd, Exeter, United Kingdom卷 / 67期

关键词：

Finite element method - Fuzzy sets - Inference engines - Mathematical models - Random processes - Regression analysis - Structural analysis;

D O I：

10.1016/S0951-8320(99)00073-3

中图分类号：

学科分类号：

摘要：

The fuzzy sets theory in reliability analyses is studied. The structure stress is related to several other variables, such as structure sizes, material properties, external loads; in most cases, it is difficult to be expressed in a mathematical formula, and the related variables are not random variables, but fuzzy variables or other uncertain variables which have not only randomness but also fuzziness. In this paper, a novel approach is presented to use the finite element analysis as a `numerical experiment' tool, and to find directly, by fuzzy linear regression method, the statistical property of the structure stress. Based on the fuzzy stress-random strength interference model proposed in this paper, the fuzzy reliability of the mechanical structure can be evaluated. The compressor blade of a given turbocharger is then introduced as a realistic example to illustrate the approach.

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