北京航空航天大学学报 ›› 2019, Vol. 45 ›› Issue (4): 752-759.doi: 10.13700/j.bh.1001-5965.2018.0421

• 论文 • 上一篇    下一篇

一种起落架载荷谱相似性判别方法

颜灿林, 贺小帆, 李玉海   

  1. 北京航空航天大学 航空科学与工程学院, 北京 100083
  • 收稿日期:2018-07-13 出版日期:2019-04-20 发布日期:2019-04-26
  • 通讯作者: 贺小帆 E-mail:xfhe@buaa.edu.cn
  • 作者简介:颜灿林,男,硕士研究生。主要研究方向:结构耐久性;贺小帆,男,博士,副教授。主要研究方向:疲劳/断裂,结构耐久性与可靠性,腐蚀条件下使用寿命评定,载荷谱编制方法;李玉海,男,教授,博士生导师。主要研究方向:飞机结构疲劳寿命可靠性。

An approach for similarity discrimination on landing gear load spectrum

YAN Canlin, HE Xiaofan, LI Yuhai   

  1. School of Aeronautic Science and Engineering, Beihang University, Beijing 100083, China
  • Received:2018-07-13 Online:2019-04-20 Published:2019-04-26

摘要: 起落架结构的寿命监控对保障其安全性与经济性具有重要作用,但由于地面谱复杂的高低载荷非线性交互作用,难以准确计算单机谱的损伤。以当量损伤计算方法为基础,通过对寿命监控中的单机谱进行初步筛选,判别单机谱与基准谱的相似程度,进而分析损伤计算方法的适用性。提出了一种基于时间序列分析中的动态时间弯曲方法的起落架载荷谱相似性判别方法,进行了基准谱与4个单机谱下的疲劳实验,通过分析损伤计算误差与起落架载荷谱相似距离的关系,验证所提载荷谱相似性判别方法的合理性。

关键词: 起落架载荷谱, 疲劳损伤, 单机寿命监控, 载荷谱相似性, 动态时间弯曲

Abstract: The life monitoring of the landing gear structure plays an important role in ensuring its safety and economy. However, it is difficult to accurately predict the fatigue damage of the individual spectrum due to the complex high-low load interaction of the ground spectrum. Therefore, based on the equivalent damage calculation method, the paper analyzes the similarity between the individual spectrum and the reference spectrum by analyzing the individual spectrum in the life monitoring, and then analyzes the applicability of the damage calculation method. An approach for comparing the similarity of landing gear load spectrum based on dynamic time warping method in time series analysis is proposed, and fatigue test under the reference spectrum and 4 individual spectra is conducted. By analyzing the relationship between the damage calculation error and the similar distance of the landing gear load spectrum, the rationality of the load spectrum similarity discrimination approach is verified.

Key words: landing gear load spectrum, fatigue damage, individual aircraft life monitoring, load spectrum similarity, dynamic time warping

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