An Analysis of Safe-life for Aircraft Structure Based on the Fusion of Test Data and Service Data
HE Yu-ting
GAO Chao
AN Tao
ZHANG Teng
HOU Bo
XIAO Jian-bo
Abstract：This paper mainly discusses how to reconcile the test results with the service data to solve fatigue safe-life of aircraft structure.Aimed at the fatigue life obedient to the Log-normal distribution or Weibull distribution,the service flying hours and test results can be reconciled directly to analyze the reliability for the aircraft structure.Aimed at the fatigue life disobedient to the Log-normal distribution or Weibull dis-tribution,the service hours can be transformed into the equivalent flying hours at the same test load spec-trum according to the equal damage to realize the fusion of the test data and the service data.The parame-ters of fatigue safe-life distribution function can be estimated by using the method of maximum likelihood function in accordance with the fusion data.The fatigue safe-life for aircraft structure is analyzed by using the estimated parameters and the fusion data.The result shows that the sample capacity is increased obvi-ously after the data fusion,and the life reserve of reliability is excavated adequately by adopting the meth-od of the fusion data under the conditions of the same reliability and confidence level.
Keywords：equivalent flying hoursfatigue scatter factorlikelihood functionsafe-life
Publication Date：2015-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 1-5 )