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Integer Frequency Veering of Mistuned Blade Integrated Disks

  • As a result of more balanced blade aspect ratios of modern blade-integrated disks (blisks), interactions between disk-dominated and blade-dominated modes are becoming more and more important, especially if blade mistuning is considered. The specific vibration behavior in these transition regions is characterized by a mix of both fundamental mode types into “coupled” modes. In this paper, numerical and experimental investigations based on a front high-pressure compressor (HPC) blisk stage were carried out in order to determine the effect of blade mistuning on those regions in detail. At this, effects like mode localization and amplitude magnification are found to be weakened in an integer frequency-veering zone. Contrary to this, blisks are very sensitive to mistuning in regions of pure blade-dominated mode families with high modal density.

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Metadaten
Author: Thomas Klauke, Ulrik Strehlau, Arnold Kühhorn
DOI:https://doi.org/10.1115/1.4024022
ISSN:1528-8900
Title of the source (English):Journal of Turbomachinery
Document Type:Scientific journal article peer-reviewed
Language:English
Year of publication:2013
Tag:Blades; Disks
Volume/Year:135
Issue number:6
First Page:061004-1
Last Page:061004-7
Faculty/Chair:Fakultät 3 Maschinenbau, Elektro- und Energiesysteme / FG Strukturmechanik und Fahrzeugschwingungen
Institution name at the time of publication:Fakultät für Maschinenbau, Elektrotechnik und Wirtschaftsingenieurwesen (eBTU) / LS Strukturmechanik und Fahrzeugschwingungen
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