TECHNICAL PAPERS: Gas Turbines: Structures and Dynamics

Friction Damper Optimization: Simulation of Rainbow Tests

[+] Author and Article Information
K. Y. Sanliturk

Faculty and Mechanical Engineering, Istanbul Technical University, 80191, Gumussuyu, Istanbul, Turkey

D. J. Ewins

Mechanical Engineering Department, Centre of Vibration Engineering, Imperial College of Science, Technology, and Medicine, London SW7 7BX, UK

R. Elliott, J. S. Green

Rolls-Royce Plc, Derby DE24 8BJ, UK

J. Eng. Gas Turbines Power 123(4), 930-939 (Mar 01, 1999) (10 pages) doi:10.1115/1.1391278 History: Received October 01, 1998; Revised March 01, 1999
Copyright © 2001 by ASME
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Schematic illustration of “rainbow” tests
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Bladed-disk model with friction elements
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(a) One-dimensional friction damper model, (b) force-displacement model of macroslip model
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Natural frequencies of the first and second family modes
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Tuned response levels for various friction limits
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Distribution of friction dampers
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(a) Blades’ response levels versus excitation frequency (N=12, EO=1); (b) blades’ maximum response levels with friction dampers (N=12, EO=1)
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(a) Blades’ response levels versus excitation frequency (N=12, EO=2); (b) blades’ maximum response levels with friction dampers (N=12, EO=2)
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(a) Blades’ response levels versus excitation frequency (N=12, EO=4); (b) blades’ maximum response levels with friction dampers (N=12, EO=4)
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(a) Blades’ response levels versus excitation frequency (N=12, EO=6); (b) blades’ maximum response levels with friction dampers (N=12, EO=6)
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(a) Blades’ maximum response levels with friction dampers (N=24, EO=2); (b) blades’ maximum response levels with friction dampers (N=24, EO=12)



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