The goal of the paper is to provide an estimation of the vibrations of a water pipe subjected to standard turbulent excitations. Firstly, a simplified expression of the acoustic pressure generated by a standard valve or orifice is proposed. It is based on the hydraulic pressure drop and a Strouhal number. Secondly, a theoretical analysis of fluid-structure interaction yields a screening expression of the structure velocity power spectral density (PSD), as a function of the acoustic pressure source. Field data are used for validation. It is shown that cavitation-induced vibration can be directly identified by plotting the structure velocity PSD in dimensionless form.
Issue Section:
Technical Briefs
Keywords:
pipes,
pipe flow,
vibrations,
turbulence,
structural acoustics,
cavitation,
orifices (mechanical)
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.Copyright © 2006
by American Society of Mechanical Engineers
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