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Measurement and Analysis of Vibrations on the Helicopter Structure in Order to Detect Defects of Operating Elements
Slobodan Stupar Aleksandar Simonović Miroslav Jovanović
A practical example of the measurement and analysis of vibrations on helicopter structures in order to detect defects on operating elements is presented in this paper. A comprehensive methodology of vibration testing is presented in this article and implemented in order to determine the correct operation of rotating components. A particular attention is given to the analysis of longitudinal and vertical vibrations on the helicopter fuselage in the frequency domain for different flight profiles. The vibration measurement and analysis on specific locations on a helicopter structure resulted in a timely technical review of a relevant component and a disclosure of the damage on its surface. The proposed methodology of measurement and analysis can be implemented on different types of aircraft in order to extend their life expectancy. Key words: helicopter, aircraft structure, fuselage, reductor, aircraft vibrations, vibration measurement, frequency range, flight test, Fourier transform.
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