Publication detail

An Experimental Comparison of Laser Interferometer Methods for Accurate Determination of Resonant Frequencies in a Turbine Wheel Assembly

KLUSÁČEK, S. FIALKA, J. HAVRÁNEK, Z. BENEŠ, P.

Original Title

An Experimental Comparison of Laser Interferometer Methods for Accurate Determination of Resonant Frequencies in a Turbine Wheel Assembly

English Title

An Experimental Comparison of Laser Interferometer Methods for Accurate Determination of Resonant Frequencies in a Turbine Wheel Assembly

Type

conference paper

Language

en

Original Abstract

This paper presents experimental research on a turbine wheel assembly used in car engines. The aim the paper is to investigate various procedures ensuring optimal search of resonant frequencies related to mechanical excitation and measuring methods. To perform the mechanical excitation described in the article, we used a vibration shaker and a modal hammer. In the given context, two measurement approaches are compared: the application of a single-point vibrometer, and the use of a special differential vibrometer. The purpose of the research is to facilitate reliable diagnostics of resonant frequencies in turbine blades, which is a process markedly responsible for the correct balancing of a turbine wheel. Such accurate determination of the resonant frequencies of a turbine wheel influences the life of the turbocharger and, moreover, enables us to eliminate possible damage to an automotive engine caused by vibrations. All the indicated measurements are mutually compared, and another comparison is performed involving the simulation results obtained from the modal analysis. The experiments demonstrate the advantages, disadvantages and differences characterising the different types of excitation and laser interferometer measurement, with a special focus on the streamlining and acceleration of experimental measurements in the development of new turbine wheels.

English abstract

This paper presents experimental research on a turbine wheel assembly used in car engines. The aim the paper is to investigate various procedures ensuring optimal search of resonant frequencies related to mechanical excitation and measuring methods. To perform the mechanical excitation described in the article, we used a vibration shaker and a modal hammer. In the given context, two measurement approaches are compared: the application of a single-point vibrometer, and the use of a special differential vibrometer. The purpose of the research is to facilitate reliable diagnostics of resonant frequencies in turbine blades, which is a process markedly responsible for the correct balancing of a turbine wheel. Such accurate determination of the resonant frequencies of a turbine wheel influences the life of the turbocharger and, moreover, enables us to eliminate possible damage to an automotive engine caused by vibrations. All the indicated measurements are mutually compared, and another comparison is performed involving the simulation results obtained from the modal analysis. The experiments demonstrate the advantages, disadvantages and differences characterising the different types of excitation and laser interferometer measurement, with a special focus on the streamlining and acceleration of experimental measurements in the development of new turbine wheels.

Keywords

Laser interferometer, single-point vibrometer, differential vibrometer, modal hammer, resonant frequency, turbine wheel

RIV year

2014

Released

13.07.2014

Publisher

International Institute of Acoustic and Vibration

Location

Peking

ISBN

978-83-62652-66-2

Book

Proceedings of the 21st International Congress on Sound and Vibration

Pages from

1

Pages to

8

Pages count

8

Documents

BibTex


@inproceedings{BUT108933,
  author="Stanislav {Klusáček} and Jiří {Fialka} and Zdeněk {Havránek} and Petr {Beneš}",
  title="An Experimental Comparison of Laser Interferometer Methods for Accurate Determination of Resonant Frequencies in a Turbine Wheel Assembly",
  annote="This paper presents experimental research on a turbine wheel assembly used in car engines. The aim the paper is to investigate various procedures ensuring optimal search of resonant frequencies related to mechanical excitation and measuring methods. To perform the mechanical excitation described in the article, we used a vibration shaker and a modal hammer. In the given context, two measurement approaches are compared: the application of a single-point vibrometer, and the use of a special differential vibrometer. The purpose of the research is to facilitate reliable diagnostics of resonant frequencies in turbine blades, which is a process markedly responsible for the correct balancing of a turbine wheel. Such accurate determination of the resonant frequencies of a turbine wheel influences the life of the turbocharger and, moreover, enables us to eliminate possible damage to an automotive engine caused by vibrations. All the indicated measurements are mutually compared, and another comparison is performed involving the simulation results obtained from the modal analysis. The experiments demonstrate the advantages, disadvantages and differences characterising the different types of excitation and laser interferometer measurement, with a special focus on the streamlining and acceleration of experimental measurements in the development of new turbine wheels.",
  address="International Institute of Acoustic and Vibration",
  booktitle="Proceedings of the 21st International Congress on Sound and Vibration",
  chapter="108933",
  howpublished="electronic, physical medium",
  institution="International Institute of Acoustic and Vibration",
  year="2014",
  month="july",
  pages="1--8",
  publisher="International Institute of Acoustic and Vibration",
  type="conference paper"
}