Volume 29 Issue 12
Dec.  2014
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Article Navigation >  Journal of Aerospace Power  > 2014  >  29(12): 2914-2923
DONG Ming-jing, DING Qian. Study on vibration localization of oblique impact of whole-circle bladed disk with tips system[J]. Journal of Aerospace Power, 2014, 29(12): 2914-2923. doi: 10.13224/j.cnki.jasp.2014.12.018
Citation: DONG Ming-jing, DING Qian. Study on vibration localization of oblique impact of whole-circle bladed disk with tips system[J]. Journal of Aerospace Power, 2014, 29(12): 2914-2923. doi: 10.13224/j.cnki.jasp.2014.12.018
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Study on vibration localization of oblique impact of whole-circle bladed disk with tips system

doi: 10.13224/j.cnki.jasp.2014.12.018

  • 1. Department of Mechanics, School of Mechanical Engineering, Tianjin University, Tianjin 300072;

  • 2. Tianjin Key Laboratory of Nonlinear Dynamics and Chaos Control, Tianjin 300072, China

  • Received Date: 2013-08-16
  • Publish Date: 2014-12-28
    Abstract
  • Vibration localization of oblique impact of whole-circle bladed disk with tips was studied. Lumped parameter dynamical model of whole-circle bladed disk with tips was developed to calculate the natural frequencies under varying coupled stiffness. Vibration characteristics and rub-impact force of the blade at different orders were computed under mistuning tip clearance. Then, oblique impact/non-impact vibration localization factors with different coupling stiffnesses were analyzed under blade mistuning stiffness. Differences of vibration localization factors for two types of coupling stiffness were studied under random mistuning stiffness and tip clearance. The result shows that when the oblique impact or disk resonance occurs, even the tuning bladed disk system may have vibration localization phenomenon. On the other hand, vibration localization happens at every order of resonance for mistuning systems. Computations suggest that rub-impact force is directly associated with vibration localization. Blades turn more sensitive to mistuning due to the oblique impact effect. In addition, systems with weaker coupling stiffness often have relatively larger vibration localization factors. Also, mistuning stiffness has more influence on blade vibration localization sensitivity than the mistuning tip clearance.

     

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