Publication detail

Modal analysis of vibrating steel beam by acoustic holography method

HAVRÁNEK, Z.

Original Title

Modal analysis of vibrating steel beam by acoustic holography method

English Title

Modal analysis of vibrating steel beam by acoustic holography method

Type

journal article - other

Language

en

Original Abstract

This paper describes practical usage of acoustic holography method for modal analysis of vibrating steel beam. Sound field near the beam surface is measured with linear microphone array and calculation of sound pressure and sound intensity levels very near surface has been performed. An acoustic holography method for visualization of pressure or intensity field has been optimalized and tuned for specific real conditions of measurement. Localization of nodes and antinodes on the beam with this method has been succesfully carried out and compared with measurement of natural frequencies of the beam with accelerometers. Non-contact method based on measurement with microphone array and calculation of sound fields by acoustic holography algorithms has significant advantages in compare with contact methods.

English abstract

This paper describes practical usage of acoustic holography method for modal analysis of vibrating steel beam. Sound field near the beam surface is measured with linear microphone array and calculation of sound pressure and sound intensity levels very near surface has been performed. An acoustic holography method for visualization of pressure or intensity field has been optimalized and tuned for specific real conditions of measurement. Localization of nodes and antinodes on the beam with this method has been succesfully carried out and compared with measurement of natural frequencies of the beam with accelerometers. Non-contact method based on measurement with microphone array and calculation of sound fields by acoustic holography algorithms has significant advantages in compare with contact methods.

Keywords

acoustic holography, visualization of sound fields, beam vibrations, modal analysis

RIV year

2006

Released

01.08.2006

ISBN

1790-5052

Periodical

WSEAS Transactions on Signal Processing

Year of study

8

Number

2

State

GR

Pages from

1130

Pages to

1136

Pages count

6

Documents

BibTex


@article{BUT43315,
  author="Zdeněk {Havránek}",
  title="Modal analysis of vibrating steel beam by acoustic holography method",
  annote="This paper describes practical usage of acoustic holography method for modal analysis of vibrating steel beam. Sound field near the beam surface is measured with linear microphone array and calculation of sound pressure and sound intensity levels very near surface has been performed. An acoustic holography method for visualization of pressure or intensity field has been optimalized and tuned for specific real conditions of measurement. Localization of nodes and antinodes on the beam with this method has been succesfully carried out and compared with measurement of natural frequencies of the beam with accelerometers. Non-contact method based on measurement with microphone array and calculation of sound fields by acoustic holography algorithms has significant advantages in compare with contact methods.",
  chapter="43315",
  number="2",
  volume="8",
  year="2006",
  month="august",
  pages="1130--1136",
  type="journal article - other"
}