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航空发动机的低温壳体在使用时需要满足相应的强度、刚度指标及质量要求。对发动机低温壳体在不同应用环境下进行定量需求分析以明确设计目标。通过QFD质量功能展开工具逐层分解客户需求、定位功能和物理参数,分析功能的重要性。通过模糊数学中的最大隶属度模糊评价原理,分析多种方案的适应性,得出定量分析结果,避免以往依靠经验和类比的不确定性。对优选的概念方案进行风险分析,识别重点失效模式并采取预防措施,获得设计关注的技术指标。实例分析结果表明:采取多种数理分析方法和实用工具对需求分析、方案决策、风险预估3个方面进行的方法研究和设计实践,有利于提高低温壳体的方案设计方法的科学性,具有一定的参考价值。
Aero-engine low-temperature shell in the use of the need to meet the corresponding strength, stiffness index and quality requirements. The low-temperature engine shell in different application environments for quantitative needs analysis to clear design goals. Through the QFD Quality Function Deployment Tool, customer needs, location functions and physical parameters are decomposed layer by layer to analyze the importance of functions. Through the fuzzy evaluation principle of the maximum degree of membership in fuzzy mathematics, the adaptability of various schemes is analyzed, and the quantitative analysis results are obtained to avoid the uncertainty of past experience and analogy. Conduct risk analysis of preferred concepts, identify key failure modes and take precautions to gain technical specifications for design concerns. The results of the example analysis show that the method research and design practice of the three aspects of demand analysis, program decision-making and risk prediction are helpful to improve the scientific design of low-temperature shell design method, Certain reference value.