Nonlinear vibrational analysis for integrally bladed disk using frictional ring damper

Yekai Sun, Jie Yuan, Luca Pesaresi, Loïc Salles

Research output: Contribution to journalConference articlepeer-review

7 Citations (Scopus)
20 Downloads (Pure)

Abstract

The use of integrally bladed-disk is now very popular in turbomachinery industry since they feature significant aerodynamic and structural improvements along with a significant mass reduction. However, these integrated single structures can arise a major high cycle fatigue issue due to the lack of sufficient damping for dissipating the vibrational energy. This work describes a numerical investigation of the nonlinear dynamic behaviour and nonlinear normal mode for such a bladed-disk with frictional ring damper using the Harmonic Balanced Method (HBM) with alternating Fourier transformation. Jenkins element is used to model the nonlinear contact friction between the disc and ring damper. Using such a modeling strategy, the modal damping and resonance amplitude are directly and efficiently computed through nonlinear normal mode analysis. The initial results show the vibrational level on the blades can be effectively controlled by the parameters of the ring damper model. The effectiveness of ring damper and damping performance is evaluated. This study also indicates the nonlinear normal mode analysis based HBM may be an effective method to analyse the dynamic behaviour of the integrated bladed-disk with frictional ring damper.

Original languageEnglish
Article number012026
Number of pages8
JournalJournal of Physics: Conference Series
Volume1106
DOIs
Publication statusPublished - 5 Nov 2018
Externally publishedYes
Event9th International Conference on Modern Practice in Stress and Vibration Analysis, MPSVA 2018 - Cambridge, United Kingdom
Duration: 2 Jul 20184 Jul 2018

Keywords

  • integrally bladed disk
  • high cycle fatigue
  • vibrational energy

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