Volume 37 Issue 2
Feb.  2022
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OUYANG Luohui, SHANG Hai, BI Qingzhen. Transient vibration suppression of blisk based on optimizing intentional mistuning[J]. Journal of Aerospace Power, 2022, 37(2): 241-250. doi: 10.13224/j.cnki.jasp.20210010
Citation: OUYANG Luohui, SHANG Hai, BI Qingzhen. Transient vibration suppression of blisk based on optimizing intentional mistuning[J]. Journal of Aerospace Power, 2022, 37(2): 241-250. doi: 10.13224/j.cnki.jasp.20210010
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Transient vibration suppression of blisk based on optimizing intentional mistuning

doi: 10.13224/j.cnki.jasp.20210010

  • School of Mechanical Engineering， Shanghai Jiao Tong University，Shanghai 200240，China

  • Received Date: 2021-01-10
  • Publish Date: 2022-02-28
    Abstract
  • A transient vibration suppression method of blisk based on optimizing intentional mistuning was proposed.First，a reduced order model of the blisk under transient acceleration or deceleration excitation was established，and the amplification factor representing the effect of the mistuning on the transient vibration was obtained.Then，based on the reduced order model，the probability density distribution of the amplification factors under a series of transient excitations was quickly calculated by Monte Carlo simulation.The results showed that the amplification factor was more affected by small level of random mistuning under transient excitations than under stationary excitations in most cases，and was more sensitive to the small level of random mistuning during fast acceleration excitation.Finally，an intelligent optimization method based on genetic algorithm was used to obtain the optimal intentional mistuning.The mean value and standard deviation of the amplification factors under the effect of 1% random mistuning with optimal intentional mistuning were reduced by 25.6% and 85.2%，respectively，compared with those without intentional mistuning.So，the optimized optimal intentional mistuning can effectively suppress the transient acceleration or deceleration vibration and has good robustness.

     

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