基于名义极限因子和降维方法的涡轮盘结构可靠性优化

杨俊杰; 王荣桥; 樊江; 申秀丽

基于名义极限因子和降维方法的涡轮盘结构可靠性优化

北京航空航天大学能源与动力工程学院,北京 100191

基金项目: 航空科学基金(1404-003F); 新世纪优秀人才项目(NCET-07-0042)

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出版历程
- 收稿日期: 2010-01-17
- 修回日期: 2010-07-06
- 刊出日期: 2011-02-28

Nominal limit state factor and dimension reduction method in reliability optimization for turbine disk

School of Jet Propulsion, Beijing University of Aeronautics and Astronautics,Beijing 100191,China

摘要

摘要: 结合名义极限因子方法完全实现了可靠性分析与优化过程的解耦,使可靠性分析成为进行优化之前的预分析过程,而在预分析中采用的基于降维的可靠性分析技术,在一阶可靠度方法(FORM)获得的计算结果的基础上进行适量的数值计算就能够提高可靠性分析的结果.最后,以某涡轮盘结构优化为例对提出的方法可行性和效率进行了验证,结果表明:该方法在优化效率上比传统的双循环优化过程(DLP)方法要高,更接近确定性优化的水平.
- 可靠性优化 /
- 名义极限因子 /
- 一阶可靠度方法 /
- 降维方法 /
- 涡轮盘结构优化
Abstract: Computing intensity and cost consuming are two important difficulties in reliability-based design optimization (RBDO).the single-looping optimization (SLO) methods and the double-looping optimization (DLO) methods cannot deal with them.Some based on the inverse most probable point (MPP) transforms the probabilistic constraints to deterministic constraints,but they cannot decouple the two procedures including reliability analysis and optimization,in additional,there are too large errors because of using the first order reliability methods(FORM) in the methods to be adaptive in aero-engine design.The nominal limit state factor method was proposed that can decouple the two procedures of reliability analysis and optimization and can make the reliability analysis become a pre-procedure before optimization.Moreover,the uni-variate dimension reduction method was used to obtain accurate probability of failure that only requires the results of FORM in previous reliability analysis.Finally,an example on structure optimization for turbine disk was given to illustrate that the proposed methods are more efficient than the DLP method and are close to the deterministic optimization in efficiency.
- reliability optimization /
- nominal limit state factor /
- first order reliability methods (FORM) /
- dimension reduction method /
- structure optimization for turbine disk

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参考文献(14)

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