Vibrational power flow and structural intensity: Measurements and limitations at low frequencies

Mogens Ohlrich

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The cross-spectral methods and their sensitivity to phase errors are investigated for the two and four-accelerometer arrays. From experiments on a beam structure it is attempted to verify the influence of phase errors and to determine the usable frequency ranges of the two methods. Measurements are made in both moderately and highly reverberant wave fields with system loss factors, η, ranging from 0.04 to 0.0004.
Original languageEnglish
JournalJournal of Low Frequency Noise, Vibration and Active Control
Issue number2
Pages (from-to)45-53
Publication statusPublished - 1991

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