Experimental and numerical investigation of rotating bladed disk forced response using underplatform friction dampers

Sever, Ibrahim A, Petrov, Evgeny P and Ewins, David J (2008) Experimental and numerical investigation of rotating bladed disk forced response using underplatform friction dampers. Journal of Engineering for Gas Turbines and Power, 130 (4). 042503. ISSN 0742-4795

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Abstract

In this paper, we present a methodology and results from an experimental investigation of forced vibration response for a bladed disk with fitted underplatform "cottage-roof" friction dampers, together with the corresponding numerical predictions. A carefully designed and constructed rotating test rig is used to make precise measurements, which involve only the phenomena of interest. For this purpose, the measurement rig is operated under vacuum to eliminate aerodynamic effects on the rotating blisk and noncontact excitation and measurement techniques are employed so as not to modify the bladed disk dynamics. The experimental data measured are used for validation of multiharmonic balance-based prediction tools developed at the Imperial College. Predictions are carried out both with and without taking inherent mechanical mistuning into account, which is identified from measured data. Measured and predicted response curves are compared with each other and the degree of correlation is discussed

Item Type: Article
Schools and Departments: School of Engineering and Informatics > Engineering and Design
Subjects: T Technology > TJ Mechanical engineering and machinery
Depositing User: Yevgen Petrov
Date Deposited: 26 Nov 2012 14:33
Last Modified: 26 Nov 2012 14:33
URI: http://srodev.sussex.ac.uk/id/eprint/43028
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