固体力学与飞行器总体设计

细节疲劳额定强度计算参量取值敏感性研究

  • 黄啸 ,
  • 刘建中 ,
  • 马少俊 ,
  • 胡本润
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  • 中国航空工业集团公司 北京航空材料研究院, 北京 100095

收稿日期: 2011-07-28

  修回日期: 2011-09-02

  网络出版日期: 2012-05-24

基金资助

大飞机重大科技专项相关课题

Sensitivity Analysis of the Parameters in Detail Fatigue Rating Equation

  • HUANG Xiao ,
  • LIU Jianzhong ,
  • MA Shaojun ,
  • HU Benrun
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  • Beijing Institute of Aeronautical Materials, Aviation Industry Corporation of China, Beijing 100095, China

Received date: 2011-07-28

  Revised date: 2011-09-02

  Online published: 2012-05-24

Supported by

Related Major Science and Technology Projects for Large Commercial Aircraft

摘要

现代民机设计中细节疲劳额定强度(DFR)方法占据重要地位。为了研究DFR方法中的参数敏感性问题,针对典型航空材料讨论了在斜度参数和分散性参数两种参数的变化范围内,直接采用波音设计许用值进行DFR计算可能造成的误差水平,并与简单的扰动分析结果进行了对比;推导了基于Gerber方程计算DFR值的新公式,并对其适用性进行了对比分析。结果表明,在上述计算参量中斜度参数对国产材料DFR计算结果影响最敏感;锻铝等延性材料更适于使用基于Gerber方程的DFR公式。

本文引用格式

黄啸 , 刘建中 , 马少俊 , 胡本润 . 细节疲劳额定强度计算参量取值敏感性研究[J]. 航空学报, 2012 , (5) : 863 -870 . DOI: CNKI:11-1929/V.20111116.1008.003

Abstract

Detail fatigue rating (DFR) method plays an important role in modern civil aircraft design. To study the sensitivity of the parameters in this method, within the range of slope parameter and dispersion parameter, this paper discusses the errors in the DFR calculation for China-made materials by using Boeing design allowable values, and completes a simple perturbation analysis. After deriving a new Gerber-based DFR equation, this paper compares the results calculated by the new Gerber-based DFR equation with those by Boeing’s DFR equation. The results indicate that of all the parameters in the DFR equation the slope parameter is the most sensitive for calculating DFR. The new Gerber-based DFR equation can be used to obtain the DFR more accurately for ductile materials than the equation presented by Boeing.

参考文献

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