傾斜円弧状剛体せきの流体関連回転振動に関する理論解析とその検証(機械力学,計測,自動制御)

概要

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Tainter gates at Folsom dam in California have an inclined circular-arc skinplate which undergoes a streamwise rotating vibration, thus inducing an excessive push and draw hydrodynamic pressure. In order to calculate the in-water inherent vibration frequency of the skinplate, such a vibration-induced hydrodynamic pressure acting on the inclined circular-arc skinplate has to be analyzed first. This study presents an empirical evaluation method of the push and draw pressure induced by the streamwise rotating vibration of the inclined circular-arc rigid skinplate, which is based on the theoretical results for the vertical flat and rigid weir plate undergoing the streamwise rotating vibration. Subsequently, the exact equation of motion of the skinplate is derived, and the in-water free vibration tests of 1/30-scale skinplate model of Folsom Tainter gates are made to verify the derived equation of motion for its validity.
2004-02-25