Publication detail

A comparison of two modal analysis methods: An impact hammer versus laser vibrometry

KREJČÍ, J. BENEŠ, P.

Original Title

A comparison of two modal analysis methods: An impact hammer versus laser vibrometry

Type

journal article in Web of Science

Language

English

Original Abstract

This paper presents a comparative experimental-analytical study on the performance of Multi-Input Single-Output (MISO) and Single-Input Multi-Output (SIMO) techniques to identify the modal properties of a cantilever beam. A 2-D laser interferometry was employed to perform the SIMO modal test, while for the MISO test configuration, a conventional accelerometer was used to measure the response of the structure. Comparing the experimentally-measured natural frequencies with those calculated by the FEM model, a maximum difference of 4% between natural frequencies was observed. The repeatability of both techniques is also investigated in this paper and it is shown that the difference between modal properties identified under different operators is less than 0.5% for both the MISO and SIMO techniques.

Keywords

modal analysis, free beam, 2D interferometer, COMSOL, ModalVIEW

Authors

KREJČÍ, J.; BENEŠ, P.

Released

19. 11. 2020

Publisher

Czech Technical University in Prague

Location

Prague

ISBN

1805-2363

Periodical

Acta Polytechnica (on-line)

Year of study

60

Number

5

State

Czech Republic

Pages from

420

Pages to

427

Pages count

7

URL

https://ojs.cvut.cz/ojs/index.php/ap/article/view/6050

Full text in the Digital Library

http://hdl.handle.net/11012/196547

BibTex

@article{BUT156812,
  author="Jakub {Krejčí} and Petr {Beneš}",
  title="A comparison of two modal analysis methods: An impact hammer versus laser vibrometry",
  journal="Acta Polytechnica (on-line)",
  year="2020",
  volume="60",
  number="5",
  pages="420--427",
  doi="10.14311/AP.2020.60.0420",
  issn="1805-2363",
  url="https://ojs.cvut.cz/ojs/index.php/ap/article/view/6050"
}