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TECHNICAL PAPERS: Gas Turbines: Structures and Dynamics

A Test Rig for Frictionally Damped Bladed Segments

[+] Author and Article Information
T. Berruti, S. Filippi, L. Goglio, M. M. Gola

Department of Mechanical Engineering, Politecnico di Torino, Corso Duca degli Abruzzi 24, 10129 Turin, Italy

S. Salvano

FIAT AVIO, Via Nizza 312, 10127 Turin, Italy

J. Eng. Gas Turbines Power 124(2), 388-394 (Mar 26, 2002) (7 pages) doi:10.1115/1.1419015 History: Received November 01, 1999; Revised February 01, 2000; Online March 26, 2002
Copyright © 2002 by ASME
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References

Figures

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Stator segment; (a) right side view, (b) left side view, (c) schematics of the assembly
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Sketch of the test rig; (a) top view, (b) detail of the preloading (A, B accelerometer locations)
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Lower platform rotation of a twist angle α
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Sketch of the support instrumented with strain gages
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Support finite element method model
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Sketch of the support calibration; (a) tensile, (b) flexural
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Accelerations measured in hoop direction for the positions A and B of the frame (excitation 1 g pk)
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First mode resonant frequency of the segment versus twist value under different levels of excitation
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Measured time histories of relative hoop displacement normal and tangential contact forces. Twist angle 0.10 angle frequency 165 Hz, excitation 5 g; (a) left support/segment contact, (b) right support/segment contact.
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Measured tangential force versus relative hoop displacement. Twist angle 0.10 deg, frequency 165 Hz, excitation 5 g; (a) left support/segment contact, (b) right support/segment contact.

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