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Analytical and experimental investigations of the vibrations of a hollow blade model of turbines |
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| Authors: | Dr-Ing Jan Danielski Dr-Ing Horst Irretier Dr-Ing Oskar Mahrenholtz Dr-Ing Midturi Swaminadham Dipl-Ing Erhard Vogt |
| Affiliation: | 1. Institut für Energetik, Technische Hochschule Posen, Polen 2. Institut für Mechanik, Universit?t Hannover, Hannover, Deutschland 3. Arbeitsbereich Meerestechnik, Techn. Univ. Hamburg-Harburg, Hamburg-Harburg, Deutschland 4. National Aeronautical Laboratory, Bangalore, Indien |
| Abstract: | The practice of using air-cooled blades for the increased efficiency of turbine stage is a recent feature with advanced aero-engines. The objective of the present paper is to describe the results of numerical and experimental investigation of the dynamical behaviour of hollow cross-sectioned blades. The analytical method consists in modelling the blades by means of a finite-element method to determine the natural frequencies and normal modes of a hollow cross-sectioned blade model. Numerical results are compared with experimental values obtained from holographic tests. |
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