Tests were conducted in bay 8 of the low-overflow spillway at Ozark Dam, Arkansas River, Arkansas, in September 1974 to study vibrations and pressure fluctuations as related to flow through the spillway. Pressures were measured on the spillway sill to determine whether fluctuations are correlated with structural vibrations. Velocity distributions were measured to study boundary layer development and to determine an equivalent roughness for the spillway surface. Gate vibrations were measured to attempt to confirm model results. Pressure fluctuations on the low overflow spillway did not exhibit a root-mean-square (RMS) value large enough to be considered as a source of excitation of spillway vibration. The structure appeared to be vibrating at a natural frequency of 2.7 cps. Structural vibration amplitude was relatively small. Gate vibrations appeared to be independent of opening. The equivalent sand grain roughness K?? determined for the Ozark spillway (0.0061 ft) supplements previous data. Theoretical boundary layer thicknesses agree with the measured velocity profiles.


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    Titel :

    Spillway Vibration, Pressure and Velocity Measurements, Ozark Lock and Dam, Arkansas River, Arkansas



    Erschienen in:

    Erscheinungsdatum :

    1977


    Format / Umfang :

    4001079


    Medientyp :

    Report


    Format :

    Elektronische Ressource


    Sprache :

    Englisch



    Klassifikation :


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    Pickering, Glenn A. | HENRY – Bundesanstalt für Wasserbau (BAW) | 1971

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    Fletcher, Bobby P. / Grace, John L. Jr. | HENRY – Bundesanstalt für Wasserbau (BAW) | 1970

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    Navigation Conditions at Lock and Dam No. 3, Arkansas River, Arkansas and Oklahoma: Hydraulic Model Investigation

    Franco, John J. / McKellar, Cody D. | HENRY – Bundesanstalt für Wasserbau (BAW) | 1968

    Freier Zugriff