Experimental investigation of flow-induced radial gate vibrations at lower subansiri dam

Research output: Contribution to conference › Paper › Research › peer review

Authors

  • T. Schlurmann
  • D.B. Bung

Research Organisations

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Details

Original languageGerman
Pages7-14
Number of pages8
Publication statusPublished - 2012

Abstract

A study on flow-induced radial gate vibration is presented. Hydrodynamic pressures and forces are measured on a rigid physical model scaled 1:35 and compared to the natural frequencies obtained by a modal analysis. Natural frequencies are found to be significantly affected by the added-mass effect induced by the water column as well as by the pre-stress due to gravity. Pressure and force time series obtained for different partial opening and water levels are transferred into frequency domain. As a result the pressure fluctuations on the gate are found to be small and no dominant frequencies are detected from the amplitude spectra. Flow-induced vibrations are thus expected to be unlikely for the prototype.

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Experimental investigation of flow-induced radial gate vibrations at lower subansiri dam. / Schlurmann, T.; Bung, D.B.
2012. 7-14.

Research output: Contribution to conference › Paper › Research › peer review

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keywords = "Model tests, Natural frequencies, Radial gate, Vibration, Frequency domain analysis, Gravitation, Hydraulic gates, Modal analysis, Ocean engineering, Water levels, Added mass effects, Experimental investigations, Flow induced vibrations, Hydrodynamic pressure, Pressure fluctuation, Radial gates, Canal gates",
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PY - 2012

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N2 - A study on flow-induced radial gate vibration is presented. Hydrodynamic pressures and forces are measured on a rigid physical model scaled 1:35 and compared to the natural frequencies obtained by a modal analysis. Natural frequencies are found to be significantly affected by the added-mass effect induced by the water column as well as by the pre-stress due to gravity. Pressure and force time series obtained for different partial opening and water levels are transferred into frequency domain. As a result the pressure fluctuations on the gate are found to be small and no dominant frequencies are detected from the amplitude spectra. Flow-induced vibrations are thus expected to be unlikely for the prototype.

AB - A study on flow-induced radial gate vibration is presented. Hydrodynamic pressures and forces are measured on a rigid physical model scaled 1:35 and compared to the natural frequencies obtained by a modal analysis. Natural frequencies are found to be significantly affected by the added-mass effect induced by the water column as well as by the pre-stress due to gravity. Pressure and force time series obtained for different partial opening and water levels are transferred into frequency domain. As a result the pressure fluctuations on the gate are found to be small and no dominant frequencies are detected from the amplitude spectra. Flow-induced vibrations are thus expected to be unlikely for the prototype.

KW - Model tests

KW - Natural frequencies

KW - Radial gate

KW - Vibration

KW - Frequency domain analysis

KW - Gravitation

KW - Hydraulic gates

KW - Modal analysis

KW - Ocean engineering

KW - Water levels

KW - Added mass effects

KW - Experimental investigations

KW - Flow induced vibrations

KW - Hydrodynamic pressure

KW - Pressure fluctuation

KW - Radial gates

KW - Canal gates

M3 - Paper

SP - 7

EP - 14

ER -