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Vibration Reduction of Blading Using Interconnecting Elements

  • G. M. Chapman
  • E. Swain
  • X. Wang
  • M. Yang
Conference paper

Abstract

Bladed discs often require devices to reduce blade vibration to eliminate the risk of fatigue failure. Different industries employ different approaches to the problem with varying levels of success. The most common vibration reduction method is to use an interconnecting element between each adjacent blade and create coupling effects which introduce a form of damping. Small steam turbines commonly employ riveted shrouds, large turbo-chargers invariably use lacing wires, some gas turbines use blades with integral shroud elements and many turbine assemblies use connecting elements which lock into place with increase in rotational speed.

This paper explores the vibration reduction opportunities offered by using continuous connections between blades with lacing wires and compares the vibration characteristics with the behaviour of integrally shrouded blades. The paper describes the mathematical modelling work required to obtain a true representation of a blade system and describes the multi-bladed response of both laced blading and integrally shrouded blades.

Keywords

Edge Mode Turbine Disc Vibration Reduction Electronic Speckle Pattern Interferometry Bladed Disc 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. W. Connor, E. Swain, A. Bellamy and G.M. Chapman. Excitation of Turbine Blade Vibrations in Large Turbochargers. Third International Conference on Turbocharging and Turbochargers, IMechE, May 1986.Google Scholar
  2. G.M. Chapman and X. Wang. Interpretation of Experimental and Theoretical Data for Prediction of Mode Shapes of Vibrating Turbocharger Blades. Journal of Vibration, Acoustics, Stress and Reliability in Design, ASME, Volume 110, No. 1, January 1988.Google Scholar
  3. G.M. Chapman and X. Wang. Vibration Analysis of Laced Blading. Third International Conference on RotorDynamics, Lyon, September 1990.Google Scholar
  4. E. Swain, G.M. Chapman and M. Yang. Vibration Characteristics of Integrally Shrouded Blades. Vibrations into Rotating Machinery, IMechE, September 1992.Google Scholar

Copyright information

© Springer-Verlag London Limited 1992

Authors and Affiliations

  • G. M. Chapman
    • 1
  • E. Swain
    • 2
  • X. Wang
    • 3
  • M. Yang
    • 2
  1. 1.School of Engineering and ManufactureLeicester PolytechnicUK
  2. 2.Engineering Design InstituteLoughborough UniversityUK
  3. 3.Mechanical Engineering DepartmentLoughborough UniversityUK

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