Deflection shape reconstructions of a rotating five-blade helicopter rotor from TLDV measurements

A. Fioretti*, D. Di Maio, D. J. Ewins, P. Castellini, E. P. Tomasini

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference Contribution (Conference Proceeding)

4 Citations (Scopus)

Abstract

Helicopters are aircraft machines which are subjected to high level of vibrations, mainly due to spinning rotors. These are made of two or more blades attached by hinges to a central hub, which can make the dynamic behaviour difficult to study. However, they share some common dynamic properties with the ones expected in bladed discs, thereby the analytical modelling of rotors can be performed using some assumptions as the ones adopted for the bladed discs. This paper presents results of a vibrations study performed on a scaled helicopter rotor model which was rotating at a fix rotational speed and excited by an air jet. A simplified analytical model of that rotor was also produced to help the identifications of the vibration patterns measured using a single point tracking-SLDV measurement method.

Original languageEnglish
Title of host publicationAIP Conference Proceedings
Pages17-28
Number of pages12
Volume1253
DOIs
Publication statusPublished - 2010
Event9th International Conference on Vibration Measurements by Laser and Noncontact Techniques and Short Course - Ancona, Italy
Duration: 22 Jun 201025 Jun 2010

Conference

Conference9th International Conference on Vibration Measurements by Laser and Noncontact Techniques and Short Course
Country/TerritoryItaly
CityAncona
Period22/06/1025/06/10

Keywords

  • Bladed disc
  • Helicopter rotor
  • TLDV

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