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Optimization of Rotor Disk Shape Considering Equalization of Residual Stress Distribution Around Central Hole FREE

[+] Author Affiliations
M. Sekihara, T. Machida

Hitachi, Ltd., Tsuchiura, Japan

Paper No. 99-GT-231, pp. V004T03A030; 6 pages
doi:10.1115/99-GT-231
From:
  • ASME 1999 International Gas Turbine and Aeroengine Congress and Exhibition
  • Volume 4: Manufacturing Materials and Metallurgy; Ceramics; Structures and Dynamics; Controls, Diagnostics and Instrumentation; Education; IGTI Scholar Award; General
  • Indianapolis, Indiana, USA, June 7–10, 1999
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 978-0-7918-7861-3
  • Copyright © 1999 by ASME

abstract

A method for optimizing a rotor disk shape so that it equalizes the residual stress distribution around the central hole has been developed. The shape around the central hole is considered a variable, and it is changed in order to determine the optimum for reducing the equivalent stress of the central hole. As a result, the optimized shape that equalizes the residual stress distribution to within 23% variation was found.

Second, experiments with aluminum rotors verified the effectiveness of the optimized shape by measuring residual deformations and stresses. And it was confirmed that the measured residual deformations coincide with the calculated deformations well.

It is therefore possible to equalize the stresses on the surface in the central hole by adopting the optimized shape.

Copyright © 1999 by ASME
This article is only available in the PDF format.

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