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Vibrational Response Analysis of Mistuned Bladed Disk System of Grouped Blades FREE

[+] Author Affiliations
Y. Kaneko, K. Mori, H. Ohyama, E. Watanabe

Mitsubishi Heavy Industries, Ltd., Takasago, Japan

Paper No. 98-GT-410, pp. V005T14A037; 8 pages
doi:10.1115/98-GT-410
From:
  • ASME 1998 International Gas Turbine and Aeroengine Congress and Exhibition
  • Volume 5: Manufacturing Materials and Metallurgy; Ceramics; Structures and Dynamics; Controls, Diagnostics and Instrumentation; Education
  • Stockholm, Sweden, June 2–5, 1998
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 978-0-7918-7866-8
  • Copyright © 1998 by ASME

abstract

For the purpose of the efficient analysis of a mistuned bladed disk system, a new analysis method which applies the substructure synthesis method and the modal analysis method is proposed. Using the proposed method, the vibrational characteristics of the grouped blades structure are studied. From the results, it is found that the grouped blades structure is very sensitive to the mistuning. It is also found that the mixed grouped blades structure (a bladed disk system consisting of some different types of grouped blades relating to the number of blades contained) has an undesirable effect on the forced response. Moreover, by comparing the vibrational characteristics of the integral shroud blades (ISB) structure with those of the grouped blades structure, it is clarified that the reliability of the ISB structure is superior to other structures also from the viewpoint of the mistuning.

Copyright © 1998 by ASME
Topics: Disks , Blades
This article is only available in the PDF format.

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