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A study of nonlinear vibrations in a frictionally-damped turbine bladed disc with comprehensive modelling of aerodynamic effects

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posted on 2023-06-08, 20:41 authored by Yevgen PetrovYevgen Petrov, Z- I Zachariadis, A Beretta, R Elliot
A new effective method for comprehensive modelling of gas flow effects on vibration of nonlinear vibration of bladed discs has been developed for a case when effect of the gas flow on the mode shapes is significant. The method separates completely the structural dynamics calculations from the significantly more computationally expensive computational fluid dynamics (CFD) calculations while provides the high accuracy of modelling for aerodynamic effects. A comprehensive analysis of the forced response using the new method has been performed for a realistic turbine bladed disc with root-disc joints, tip and underplatform dampers. The full chain of aerodynamic and structural calculations are performed: (i) determination of boundary conditions for CFD; (ii) CFD analysis; (iii) calculation of the aerodynamic characteristics required by the new method; (iv) nonlinear forced response analysis using the MAIM. The efficiency of the friction damping devices has been studied and compared for several resonance frequencies and engine orders. Advantages of the method for aerodynamic effect modelling have been demonstrated. Copyright 2012 by ASME.

History

Publication status

  • Published

Publisher

American Society of Mechanical Engineers (ASME)

Page range

1239-1251

Event name

ASME Turbo Expo 2012: Turbine Technical Conference and Exposition, GT 2012, June 11, 2012 - June 15, 2012

Event location

Copenhagen, Denmark

Book title

ASME Turbo Expo 2012: Turbine Technical Conference and Exposition, Volume 7: Structures and Dynamics, Parts A and B, Copenhagen, Denmark, June 11–15, 2012

Series

Proceedings of the ASME Turbo Expo

Department affiliated with

  • Engineering and Design Publications

Notes

Paper No. GT2012-69052

Full text available

  • No

Peer reviewed?

  • Yes

Legacy Posted Date

2015-05-04

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