| ZHAO Lei.Design Requirements Analysis and Indicators Determination Strategy of Aeroengine Cryogenic Shell[J].航空发动机,2017,43(5):91-96 |
| Design Requirements Analysis and Indicators Determination Strategy of Aeroengine Cryogenic Shell |
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| Key Words:shell structure project design QFD fuzzy evaluation risk analysis aeroengine |
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| Abstract:The cryogenic shell of an aeroengine must meet the necessary strength, stiffness and the weight. Quantitative requirement
analysis of aeroengine cryogenic shell was perfromed to clear the design goals in the different engine application environment. Customer
requirements were decomposed by the six-sigma design concept in the QFD quality functions tools, functions and physical parameters were
positioned, and the importance of the function was analyzed. Through the fuzzy evaluation principle of the maximum membership degree in
fuzzy mathematics, the adaptability of the schemes was analyzed, and the quantitative analysis results were obtained, which avoided the
uncertainty of experience and analogy. Finally, the risk analysis of the optimal conceptual scheme was carried out to identify the key failure
modes and take preventive measures to obtain the technical indicators of design concern. The results of case analysis show that it is helpful
to improve the scientific design of the scheme of low temperature shell using a variety of mathematical analysis methods and practical tools
to carry out the method research and design practice of requirement analysis, concept decision and risk estimation. |
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