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ACTA AERONAUTICAET ASTRONAUTICA SINICA ›› 1997, Vol. 18 ›› Issue (1): 1-5.

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LOAD SPECTRUM DRAWING FOR THE ACCELERATIVE TEST OF THE AIRCRAFT COMPONENT AND THE DAMAGE PROBABILITY DISTRIBUTION

Xiong Junjiang1, Gao Zhentong1, Yan Chuliang2, Meng Fanpei3   

  1. 1. Research Center of Solid Mechanics, Beijing Univerisity of Aeronautics and Astronautics, Beijing, 100083;2. Beijing Structural Strength Institute, Beijing, 100083;3. Xian Aircraft Company, Xi'an
  • Received:1995-11-19 Revised:1996-04-25 Online:1997-02-25 Published:1997-02-25

Abstract:

The damage quantity of the structure resulting from the actual load spectrum is treated in the statistical analysis as the random variable. So the representative actual load spectrum with the high confidence level can be determined. Then according to the principle of equivalent damage, the accelerative test load spectrum is drawn up. Drawing up the accelerative test load spectrum, the main wave shape and load order of the actual load spectrum remain unchanged. Only the 2 level wave is included in the equivalent damage calculation, and the test time is shortened.

Key words: fatigue load spectrum, confidence level, acceler ative test, load spectrum

CLC Number: