A simplified method for estimating the vibrations of water pipes under the effect of unsteady fluid flows is proposed. The first natural frequencies of water pipes being about some 10 Hz due to standard design rules, and supports being arranged with spans of the order of 5 m, the fluid flow can reasonably be described as incompressible, so that acoustics do not play a significant role within this framework. Assuming for the sake of simplicity that the fluid velocity field is the gradient of a potential, it generates an inertial pressure field along the pipe. Simple equations are derived for describing the fluid flow associated with a given mode shape of the pipe, and coupled equations are provided which link the unsteady fluid flow to the vibrations. A simple test case is provided, which supports the idea that for water pipes, the vibration velocity of the structure and the unsteady fluid velocity are in the same order of magnitude.
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ASME 2015 Pressure Vessels and Piping Conference
July 19–23, 2015
Boston, Massachusetts, USA
Conference Sponsors:
- Pressure Vessels and Piping Division
ISBN:
978-0-7918-5697-0
PROCEEDINGS PAPER
Vibration Spectrum of a Water Pipe Under the Effect of Unsteady Fluid Loading Available to Purchase
Hassan Berro,
Hassan Berro
Electricité de France R&D, Clamart, France
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Pierre Moussou
Pierre Moussou
IMSIA, Clamart, France
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Hassan Berro
Electricité de France R&D, Clamart, France
Pierre Moussou
IMSIA, Clamart, France
Paper No:
PVP2015-45288, V004T04A027; 8 pages
Published Online:
November 19, 2015
Citation
Berro, H, & Moussou, P. "Vibration Spectrum of a Water Pipe Under the Effect of Unsteady Fluid Loading." Proceedings of the ASME 2015 Pressure Vessels and Piping Conference. Volume 4: Fluid-Structure Interaction. Boston, Massachusetts, USA. July 19–23, 2015. V004T04A027. ASME. https://doi.org/10.1115/PVP2015-45288
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