Volume 29 Issue 6
Jun.  2014
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WANG Pei-yi, LI Lin. Reduced order computational method for analysis of mistuning bladed disk dynamics characteristic[J]. Journal of Aerospace Power, 2014, (6): 1395-1402. doi: 10.13224/j.cnki.jasp.2014.06.020
Citation: WANG Pei-yi, LI Lin. Reduced order computational method for analysis of mistuning bladed disk dynamics characteristic[J]. Journal of Aerospace Power, 2014, (6): 1395-1402. doi: 10.13224/j.cnki.jasp.2014.06.020

Reduced order computational method for analysis of mistuning bladed disk dynamics characteristic

doi: 10.13224/j.cnki.jasp.2014.06.020
  • Received Date: 2013-11-06
  • Publish Date: 2014-06-28
  • A reduced order method was proposed to analyze the dynamics characteristic of mistuning bladed disks. Based on cyclic symmetry and harmonic balance method, a non-linear iteration equation was formed, of which the matrix scale was the same to the matrix size of a single sector and was solved without any truncate error, consequently its efficiency was higher than the component mode synthesis method without losing any accuracy. The mathematical deduction was given based on cyclic periodicity theory. Furthermore, the efficiency and accuracy of this method were investigated by performing a numerical study on a finite element model of mistuning bladed disk. The results show that, compared with component mode synthesis method,the matrix size of the method proposed is reduced by 59.5%, the computational complexity is lowered by 93.4%, the computational time is saved by 57.4%.

     

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