Hybrid method for studying the effect of the material change on the blade vibration behavior

Document Type : Research Article


1 Professor, Aerospace Department, Amirkabir University of Technology, Tehran, Iran

2 Associate Professor, Mechanical Engineering Department, University of Tabriz, Tabriz, Iran


To increase the production efficiency of a typical turbine blade, it is necessary to change its material and hence its production technology. In this respect and in order to make sure that new
material will not bring about the blade resonant vibrations, the common practice is to use the Campbell diagram approach. This approach only indicates the potential dangers for blade forced vibration. The purpose of this paper is to demonstrate the efficiency of a proposed hybrid procedure for the development of a reliable Campbell diagram, using an updated finite element
model and a simplified test setup.


  • Finite Element Model Updating is used as an identification tool,
  • Experimental Modal analysis of a rotating system performed,
  • Campbell diagram was developed for an industrial Turbine Blade.


Main Subjects

[1] N.A. Cumpsty, Compressor aerodynamics, Longman Scientific & Technical, 1989.
[2] M. Baumgartner, F. Kameier, J. Hourmouziadis, Non-engine order blade vibration in a high pressure compressor, in, 1995.
[3] S. Jordan, M.J. Fraser, Gas Turbine Rotating Blade Life Improvement, TMC Kulala Lumpur, Malaysia.
[4] J.E. Mottershead, M.I. Friswell, Model updating in structural dynamics: a survey, Journal of sound and vibration, 167 (1993) 347-375.
[5] I. Bucher, D.J. Ewins, A method for model updating undamped gyroscopic structures, Structural dynamics modelling- Test, analysis and correlation, (1996) 319-334.