Volume 30 Issue 1
Jan.  2015
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LIN He, WANG San-min, DONG Jin-cheng. Dynamic characteristics under various excitations for a helicopter transmission system[J]. Journal of Aerospace Power, 2015, 30(1): 219-227. doi: 10.13224/j.cnki.jasp.2015.01.029
Citation: LIN He, WANG San-min, DONG Jin-cheng. Dynamic characteristics under various excitations for a helicopter transmission system[J]. Journal of Aerospace Power, 2015, 30(1): 219-227. doi: 10.13224/j.cnki.jasp.2015.01.029

Dynamic characteristics under various excitations for a helicopter transmission system

doi: 10.13224/j.cnki.jasp.2015.01.029
  • Received Date: 2013-08-28
  • Publish Date: 2015-01-28
  • For a helicopter transmission system which consists of spiral bevel gears and planetary gear train, the purely torsional vibration model was established, and the non-linear dynamical equations containing backlash was built using the lumped-parameter method. Through the finite element method, the time-varying mesh stiffness was obtained, and the dynamical equations were solved by the 4-5 order Runge-Kutta algorithm with variable time step; by means of dynamic load coefficient, phase plane plots, Poincaré maps and fast Fourier transform spectra, the dynamic characteristics of transmission system were studied under various excitations of the time-varying mesh stiffness, backlash, general transmission errors and external load. The results show that mesh stiffness has the greatest effect on the transmission system, with the maximum dynamic load coefficient of 1.5; backlash has a limited effect on the response characteristics; to some extent, mesh errors can suppress the vibration of the gear system; external load fluctuation has various effects on different speed stages, and the maximum dynamic load coefficient is stemmed from the combined drive gears.

     

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