Volume 30 Issue 11
Nov.  2015
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Article Navigation >  Journal of Aerospace Power  > 2015  >  30(11): 2753-2761
MA Yan-hong, CAO Chong, HAO Yong, ZHANG Bo, HONG Jie. Structure and dynamics analysis of rotor system in geared turbofan engine[J]. Journal of Aerospace Power, 2015, 30(11): 2753-2761. doi: 10.13224/j.cnki.jasp.2015.11.025
Citation: MA Yan-hong, CAO Chong, HAO Yong, ZHANG Bo, HONG Jie. Structure and dynamics analysis of rotor system in geared turbofan engine[J]. Journal of Aerospace Power, 2015, 30(11): 2753-2761. doi: 10.13224/j.cnki.jasp.2015.11.025
shu

Structure and dynamics analysis of rotor system in geared turbofan engine

doi: 10.13224/j.cnki.jasp.2015.11.025

  • 1. School of Energy and Power Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China;

  • 2. Shenyang Engine Design and Research Institute, Aviation Industry Corporation of China, Shenyang 110015, China

  • Received Date: 2014-04-20
  • Publish Date: 2015-11-28
    Abstract
  • Taking the coupling between fan and low-pressure rotors of geared turbo fan (GTF) engine into consideration, a simplified model of rotor system and a critical speed calculation method for the model were proposed. Differences of critical speed results between the overall rotor system and the single rotor system were clarified. Influence of typical parameters on critical speed and dynamics of the rotor system was discussed. From the results, calculating the fan and low-pressure rotors separately causes deviation of natural frequency and loss of critical speed. Increase of the gearbox support stiffness leads to rise of critical speeds, while keeping the stiffness value below 106N/m may provide better dynamic characteristics. The flexural rigidity of the torque transmission shaft and radial stiffness of the gearbox have less impact on system's dynamic characteristics.

     

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