基于实测数据的疲劳寿命分散系数取值研究  

Research on the Fatigue Life Scatter Factor Value Based on Measured Data

作　　者：王创奇 孟新意 WANG Chuangqi;MENG Xinyi(Xi’an Aircraft Corporation Design Institute,AVIC Aircraft Co.,Ltd.,Xi’an 710089,China)

机构地区：[1]中航飞机股份有限公司西飞设计院,西安710089

出　　处：《航空工程进展》2020年第3期394-399,共6页Advances in Aeronautical Science and Engineering

摘　　要：随着基准谱、严重谱编制研究的深入,利用实测数据编制载荷谱在编谱方法和分散系数取值等方面需求愈发迫切。从正态概率分布理论出发,讨论影响疲劳寿命分散系数取值的主要因素;针对基准谱和严重谱之间的差异性,提出基准谱和严重谱的折算思路和方法,并通过实测数据编制的基准谱和严重谱折算系数进行比较分析。结果表明:采用本文方法可以实现基准谱与严重谱之间损伤分散系数的折算取值。With the deep development of baseline spectrum or severe spectrum,it is necessary to use the measured data to develop the load spectrum in spectrum developing method and life scatter factor.Based on the normal distribution theory,the factors that affect the dispersion of fatigue life are discussed.For the difference between the baseline spectrum and the severe spectrum,the idea and method of the conversion between the baseline spectrum and severe spectrum is proposed.The comparative analysis of the spectrum conversion factor between the baseline spectrum and severe spectrum developed by measured data is performed.The results show that the method can realize the conversion value of dispersion conversion coefficient between baseline spectrum and severe spectrum.

关 键 词：疲劳寿命 分散系数 基准谱 严重谱 飞行实测数据 

分 类 号：V215.5[航空宇航科学与技术—航空宇航推进理论与工程]