Localization of stationary source of floor vibration using steered response power method

Mohammad Royvaran, Kevin D. Donohue, Brad Davis

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

It is sometimes necessary to locate the source of machinery-induced vibrations in buildings when the generated vibration exceeds the acceptable limits. The objective of this study is to localize stationary source of vibration using floor vibration measurements with the steered response power (SRP) method. While this method has been used in microphone array processing and acoustic imaging systems, this paper describes the first application of this method to surface wave vibrations in structures. Source locations are derived from shifted and summed version of received signals by accelerometers to search and find the maximum likelihood of source location. Similar to the time difference of arrival (TDOA) method, the accuracy of the estimate is degraded by the frequency dependent propagation speed and attenuation of concrete floor, which lead to changes in the shape of the received signals. However, the SRP method is more robust than TDOA. Additional processing steps will be applied to reduce the effect of the aforementioned issues. The accuracy of the SRP method is validated through series of experiments in a building. To estimate the wave propagation speed, which is needed for SRP method, cross-correlation is used to compute delays between received signals. The accuracy of this method depends on the location of the source on the bay. Experiments showed an average error of 1 m or less for a single bay with a size of approximately 13.4 by 8.2 m when the source is located at mid bay. The results for SRP method as well as its advantages and shortcomings are discussed.

Original languageEnglish
Title of host publicationDynamics of Civil Structures, Volume 2 - Proceedings of the 38th IMAC, A Conference and Exposition on Structural Dynamics, 2020
EditorsShamim Pakzad
Pages141-149
Number of pages9
DOIs
StatePublished - 2021
Event38th IMAC, A Conference and Exposition on Structural Dynamics, 2020 - Houston, United States
Duration: Feb 10 2020Feb 13 2020

Publication series

NameConference Proceedings of the Society for Experimental Mechanics Series
ISSN (Print)2191-5644
ISSN (Electronic)2191-5652

Conference

Conference38th IMAC, A Conference and Exposition on Structural Dynamics, 2020
Country/TerritoryUnited States
CityHouston
Period2/10/202/13/20

Bibliographical note

Publisher Copyright:
© 2021, The Society for Experimental Mechanics, Inc.

Keywords

  • Smart structure
  • Steered response power (SRP)
  • Time different of arrival (TDOA)
  • Vibration source localization
  • Wave propagation speed

ASJC Scopus subject areas

  • Engineering (all)
  • Computational Mechanics
  • Mechanical Engineering

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