Journal of Northeastern University Natural Science ›› 2020, Vol. 41 ›› Issue (12): 1733-1740.DOI: 10.12068/j.issn.1005-3026.2020.12.010

• Mechanical Engineering • Previous Articles     Next Articles

Study on Vibration Characteristics of Mistuned Blisk Based on PIHISCMSM

SUN Hong-yun1, YUAN Hui-qun2, ZHAO Tian-yu2   

  1. 1.School of Mechanical Engineering & Automation, Northeastern University, Shenyang 110819, China; 2. School of Sciences, Northeastern University, Shenyang 110819, China.
  • Received:2020-02-23 Revised:2020-02-23 Online:2020-12-15 Published:2020-12-22
  • Contact: YUAN Hui-qun
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Abstract: In order to investigate coupling vibration characteristics of new structure aero-engine disc-blade-shaft integration system, an improved hybrid interface substructural component modal synthesis method with prestress (PIHISCMSM) was proposed, and the accuracy of dynamics analysis results was verified by modal analysis. Based on the Isight software integrated APDL language, a CAD/CAE parameter driven finite element analysis platform for blisk system was established. The dynamic characteristics of mistuned blisk system with different blade thickness was studied. The results show that, under the same mistuning pattern, for blisk system with different blade thickness, the sensitivity degree of modal localization factor to different modal order is different. With the increase of blade thickness, the frequency of blade dominant vibration increases, the resonance frequency of blisk system increases, the resonance peak decreases, and the increase of blade thickness can reduce the vibration response localization degree of the mistuned blisk system.

Key words: mistuned blisk, modal synthesis method, vibration characteristics, strain energy

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