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ACTA AERONAUTICAET ASTRONAUTICA SINICA ›› 1992, Vol. 13 ›› Issue (2): 74-77.

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A METHOD AND A SOFTWARE FOR CONSTRUCTING FLIGHT-BY-FLIGHT RANDOM LOAD SPECTRUM

Li Jan, Chen Zhi-wei   

  1. First Lnstiiute of air force, Beijing, 100076
  • Received:1990-02-09 Revised:1990-07-20 Online:1992-02-25 Published:1992-02-25

Abstract:

The paper presents a method and a software for constructing flight-by flight random load spectrum. Based on load factors at centre of gravity measured in flights, the software creates Markov matrix corresponding to each flight mission after processing the data. The statistical averaged Markov matrix is adjusted to ensure an obtainable uninterrupted load sequence. Then, a sequence of half-cycle is drawn from the matrix to construct a flight by flight random load spectrum. The drawing method for half-cycle in the matrix is discussed, and an example of application is given in the paper.

Key words: Random load, Load spectrum, Markov matrix