Removing unwanted noise from operational modal analysis data

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations

Abstract

Operational modal analysis data includes the measurement of dynamic signals such as structural vibration data and the corresponding excitation force or pressure. In addition to the desired information, measured structural vibration data can include unwanted electrical noise and vibration energy from adjacent structures. Measured dynamic pressures can contain unwanted signals such as acoustic and vibration induced pressures. In this paper, a noise removal technique is presented in which an unlimited number of unwanted correlated signals can be removed from a set of measured data. In its simplest form, this technique is related to coherent output power (COP). However, unlike COP noise removal, multiple signals can be removed from measured data while retaining the magnitude and phase of the original data required for modal analysis processing. This technique is demonstrated using vibration data and dynamic wall pressure measurements from a thin-walled aluminum cylinder filled with water flowing at 20 ft/s.

Original languageEnglish (US)
Title of host publicationTopics in Modal Analysis - Proceedings of the 33rd IMAC, a Conference and Exposition on Structural Dynamics, 2015
EditorsMichael Mains
PublisherSpringer New York LLC
Pages115-122
Number of pages8
Volume10
ISBN (Print)9783319152509
DOIs
StatePublished - Jan 1 2015
Event33rd IMAC Conference and Exposition on Structural Dynamics, 2015 - Orlando, United States
Duration: Feb 2 2015Feb 5 2015

Other

Other33rd IMAC Conference and Exposition on Structural Dynamics, 2015
CountryUnited States
CityOrlando
Period2/2/152/5/15

    Fingerprint

All Science Journal Classification (ASJC) codes

  • Engineering(all)
  • Computational Mechanics
  • Mechanical Engineering

Cite this

Bonness, W. K., & Jenkins, Jr., D. M. (2015). Removing unwanted noise from operational modal analysis data. In M. Mains (Ed.), Topics in Modal Analysis - Proceedings of the 33rd IMAC, a Conference and Exposition on Structural Dynamics, 2015 (Vol. 10, pp. 115-122). Springer New York LLC. https://doi.org/10.1007/978-3-319-15251-6_13