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ACTA AERONAUTICAET ASTRONAUTICA SINICA ›› 2017, Vol. 38 ›› Issue (10): 221126-221126.doi: 10.7527/S1000-6893.2017.221126

• Solid Mechanics and Vehicle Conceptual Design • Previous Articles     Next Articles

Failure risk assessment method of civil aircraft based on Monte Carlo method

GUO Yuanyuan, SUN Youchao, LI Longbiao   

  1. College of Civil Aviation, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
  • Received:2017-01-12 Revised:2017-05-03 Online:2017-10-15 Published:2017-05-03
  • Supported by:

    Jointly fund of National Natural Science Foundation of China and Civil Aviation Administration of China (U1333119);Defense Industrial Technology Development Program (JCKY2013605B002);Civil Aircraft Special Foundation of Ministry of Industry and Information Technology (MJ-F-2011-33);Fund of Shanghai Engineering Research for Civil Aircraft Health Monitoring (GCZX-2015-05);Technical Project Foundation of State Administration of Science,Technology and Industry for National Defense (Z052013B003)

Abstract:

In order to improve aviation safety and reduce the risk level of parts failure in the process of civil aircraft operation,the individual and fleet risks have been calculated.The key points of individual risk are how to confirm the failure distribution and rate,which turns out that Wei-bull distribution is applicable.According to the failure mechanism of part,the non-detection probability and the conditional probability the detect will leads to an unsafe outcome as well as related injury rate have been listed,in order to determine the risk level.Based on the individual risk,the key points of fleet risk are fleet scale and current flight circles.The number of failure flights has been predicted based on operational data.The risk value has been acquired under different operated situation such as parameter distribution,number of failure flights as well as retirement cycles.The failure time of individual and fleet has been simulated by Monte Carlo method in the case of serration crack in turbine disc of aero-engine.The risk levels of individual and fleet about this part have been analyzed,and the two kinds risk levels have been given at continued airworthiness stage based on operational data.

Key words: civil aircraft, fleet risk, individual risk, Monte Carlo method, cumulative distribution function, failure rate

CLC Number: