Laboratory for Dynamics of Machines and Structures 
Measurement of the bending vibration frequencies of a rotating turbo wheel using an optical fibre reflective sensor
 J. Slavič, P. Čermelj, A. Babnik, J. Rejec, J. Možina and M. Boltežar
Measurement Science and Technology, 2002, vol. 13, 4, 477-482

download pdf   http://dx.doi.org/10.1088/0957-0233/13/4/308
Povzetek
An optical fibre reflective sensor was used to analyse the vibrations of a rotating turbo wheel up to 20 400 rpm. The measured signal required correction because of the natural unevenness of the turbo wheel and because of the variable deflection. Because the turbo wheel was rotating the signal became distorted and so we used a special method to extract the frequencies of the vibrations from the power spectra. The analysis showed increased intensity of the first three natural frequencies with an increased speed of rotation. The experimental results match very well with those obtained by numerical computation.
Authors

Profesor

Janko Slavič, dr.

  Ladisk, Fakulteta za strojništvo, Univerza v Ljubljani
  janko.slavic@fs.uni-lj.si
  +386 1 4771 226
jankoslavic     jankoslavic    
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Glavni komercialni direktor

Primož Čermelj, dr.

  Iskra Mehanizmi, d.o.o.
  
  
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Raziskovalec

Aleš Babnik, dr.

  Kolt, Faculty of Mechanical Engineering, University of Ljubljana
  ales.babnik@fs.uni-lj.si
  +386 1 4771 151

R&D

Jožica Rejec, dr.

  Domel d.d., �elezniki
  jozica.rejec@domel.si
  

Full Professor

Janez Možina, dr.

  Kolt, Faculty of Mechanical Engineering, University of Ljubljana
  janez.mozina@fs.uni-lj.si
  +386 1 4771 616

Profesor

Miha Boltežar, dr.

  Ladisk, Fakulteta za strojništvo, Univerza v Ljubljani
  miha.boltezar@fs.uni-lj.si
  +386 1 4771 608
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