International Journal of Aerospace System Engineering

The Society for Aerospace System Engineering (항공우주시스템공학회)
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Dynamical Analysis and Design of Bearingless Rotor Flexbeam

  • Shi, Weixing (School of Aeronautic Science and Engineering, Beihang University) ;
  • Wang, Jidong (School of Aeronautic Science and Engineering, Beihang University)
  • Received : 2015.05.26
  • Accepted : 2015.06.15
  • Published : 2015.06.30
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Abstract

In helicopter bearingless rotor design, the flexbeam is the key component of rotor system, which plays an importantrole in the blade flapping, lead-lag movement, torsion, and load transfer. Flexbeam must have the minimum torsion stiffness with enough tension strength. In this paper, we first investigated the torsion stiffness of different cross section configurations of the flexbeam through some simple experiments. Then we analyzed a rotor's dynamical characteristics with finite element method and got the rotor's fan plot. After that, we studied the relationship between the frequency changes with the spanwise distribution of mass and stiffness in bearingless rotor. Finally, we analyzed the influence of the flexbeam on dynamical characteristics of the bearingless rotor system, and completed the design of this type of rotor flexbeam.

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References

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