長径間ゲートの流体関連振動 : 第4報, 振動数比と流体減衰比

概要

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This study presents the calculated results for flow-induced vibration frequency and fluid damping of a streamwise vibrating vertical long-span gate under a small gate-opening. The gate vibration characteristics are determined by the following three non-dimensional factors: basic Froude number composed of the gate-opening depth and the vibration frequency in air, mass ratio of water to gate, and water depth ratio of the gate opening depth and the reservoir depth. The calculated results are shown in figures from which vibration frequency ratio and fluid damping ratio can be easily found for given non-dimensional factors. When the basic Froude number takes a value larger than 10.0, the vibration frequency ratio with an error less than 7% takes a constant value given by a simple expression of the mass ratio.
一般社団法人日本機械学会の論文
1990-11-25