Published December 10, 2015
| Version v1
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METHOD OF DETERMINING OF FORMS OF RESONANT VIBRATIONS SHAPES OF BLADES OF GAS TURBINE ENGINE BY SPECKLE INTERFEROGRAM Patent UA 103068 (2015) 103
Authors/Creators
- 1. ADMIRAL MAKAROV NATIONAL UNIVERSITY OF SHIPBUILDING
Description
The method is designed for contactless and high-precision study of the dynamic characteristics (natural frequencies and vibration modes) of turbine and compressor blades in gas turbine engines. Operating principle: Electronic speckle interferometry (time averaging) is used. Laser radiation forms a speckle pattern on the surface of a vibrating blade. Analysis of interference fringes allows for highly accurate recording of amplitude-frequency characteristics and nodal lines at resonance.
Novelty: Improved noise immunity and accuracy of coherent optical measurements under real experimental conditions, enabling the identification of hidden defects and refinement of finite element models of blades.
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