北京航空航天大学学报 ›› 2015, Vol. 41 ›› Issue (3): 551-558.doi: 10.13700/j.bh.1001-5965.2014.0195

• 论文 • 上一篇    下一篇

基于Fokker F27机群载荷谱损伤分散性计算分析

李唐, 贺小帆, 刘文珽   

  1. 北京航空航天大学 航空科学与工程学院, 北京 100191
  • 收稿日期:2014-04-09 出版日期:2015-03-20 发布日期:2015-04-02
  • 通讯作者: 贺小帆(1976—),男,湖北天门人,教授,xfhe@buaa.edu.cn,主要研究方向为结构耐久性/损伤容限研究. E-mail:xfhe@buaa.edu.cn
  • 作者简介:李唐(1991—),男,四川成都人,硕士生,litang@buaa.edu.cn
  • 基金资助:
    国家自然科学基金资助项目(11002009)

Calculation and analysis of the scatter of load spectrum damage based on Fokker F27 airplanes

LI Tang, HE Xiaofan, LIU Wenting   

  1. School of Aeronautic Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China
  • Received:2014-04-09 Online:2015-03-20 Published:2015-04-02

摘要: 为考虑机群载荷谱分散性进行机群可靠性寿命评估,以56架Fokker F27飞机每次飞行的载荷因子-超越数曲线族为基础,编制得到56架飞机的载荷谱,选取SWT公式和线性累积损伤理论计算得到每架飞机的飞行载荷损伤、地-空-地载荷损伤和每次飞行载荷损伤,采用概率坐标回归方法进行拟合优度检验.结果表明,飞行载荷损伤服从威布尔分布、地-空-地载荷损伤服从对数正态分布,综合飞行载荷和地-空-地载荷损伤的每次飞行损伤服从对数正态分布,每次飞行损伤的对数标准差为0.073 7.

关键词: 载荷谱, 损伤, 分散性, 分布, 飞机结构

Abstract: To assess the reliability life of a fleet, the scatter of the load spectrum must be considered. In this paper, 56 individual load spectra are compiled based on the acceleration-exceedance curves corresponding to a fleet of Fokker F27. With the application of the SWT formula and linear accumulative damage rule, the flight damage and the ground-air-ground (GAG) damage, as well as the total damage per flight have been analyzed. Next, the probabilistic coordinate regression is conducted to examine the distribution parameters of the three types of the damage of load spectra respectively. The goodness fit shows that the flight damage follows the Weibull distribution whilst the GAG damage follows the lognormal distribution, and the total damage comprehensively including flight damage and GAG damage follows a lognormal distribution. In addition, the lognormal standard deviation of the total damage is 0.073 7.

Key words: load spectrum, damage, scatter, distribution, airplane structure

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