Volume 34 Issue 8
Aug.  2019
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Load reducing mechanism under fan blade out event[J]. Journal of Aerospace Power, 2019, 34(8): 1788-1794. doi: 10.13224/j.cnki.jasp.2019.08.019
Citation: Load reducing mechanism under fan blade out event[J]. Journal of Aerospace Power, 2019, 34(8): 1788-1794. doi: 10.13224/j.cnki.jasp.2019.08.019

Load reducing mechanism under fan blade out event

doi: 10.13224/j.cnki.jasp.2019.08.019
  • Received Date: 2019-03-24
  • Publish Date: 2019-08-28
  • By using a simplified rotor finite element model,comparative analyses with and without load reduce device (LRD) design were carried out,including the critical speed,dynamic load response and the axis trajectory of the rotor. The mechanism of structural load reduction under fan blade out was studied. Analysis results indicated that due to the fuse design of the 1# bearing,the low-pressure rotor support changed from three bearings to two bearings.As a result, the critical speed of fan mode was reduced, the radius of axis trajectory was decreased,and fan rotor ran at supercritical speed,which reduced load response at high speed.The method adopted in this mechanism study can be used to determine the load threshold range of fused structure and to evaluate its load reduction effect.

     

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