基于傅里叶级数法的燃油喷嘴半脊模糊可靠性  

HALF-RIDGE FUZZY RELIABILITY OF FUEL NOZZLE BASED ON FOURIER SERIES METHOD

作　　者：黄振南[1] 靳伍银[1] 靳岚[1] 徒高桥 

机构地区：[1]兰州理工大学机电工程学院,甘肃兰州730050

出　　处：《工程力学》2015年第3期212-216,共5页Engineering Mechanics

基　　金：中国燃气涡轮研究院技术合同项目(JJHK-2010-01-09)

摘　　要：该研究运用傅里叶级数展开与半脊隶属度,计算航空发动机燃油喷嘴在模糊安全状态为模糊广义强度的模糊可靠性。这种方法可以提高获得精确解的可能性,同时降低了计算的复杂性。航空发动机燃油喷嘴引射器在正态分布热应力下,傅里叶级数法计算的模糊可靠性相对数值积分法更准确。验证了该方法的计算能力比数值积分法更强,多级数的方式提供更稳定的验算,并产生更低的误差率,因此适用于模糊可靠性分析。Fourier series expansion and half-ridge membership function were used to compute the fuzzy reliability of an aviation fuel nozzle under a fuzzy safety state. The fuzzy safety state is defined by fuzzy generalized strength. When using this method, the possibility of obtaining an exact solution is improved and computational complexity is reduced. For fuel nozzles under normally distributed thermal stress, the fuzzy reliability computed by Fourier series method was more accurate than that computed by the numerical integration method. Also, computational capability was validated to be greater than numerical method. The multiple series approach offers more stable computation, while generating a lower error rate. Thus it is suitable for fuzzy safety state reliability analysis.

关 键 词：傅里叶级数法 模糊广义强度 模糊安全状态 半脊隶属度 燃油喷嘴可靠性 

分 类 号：V233.22[航空宇航科学与技术—航空宇航推进理论与工程]