615 フォルソンダムゲートの流体関連複合振動のモデル実験(流体-構造連成しんどうとスロッシング)(OS.17 : 流体関連振動のダイナミクスと制御)

概要

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It has been carefully studied that radial gates, used in great numbers for water-level adjustment of the dam, essentially possess a non-eccentricity dynamic instability which would have closely related to Folsom dam radial gate failure early in the morning of July 17, 1995. It was considered until now that if the skinplate is non-eccentric to the trunnion pin, radial gates never induce any self-excited vibration. However, it was significantly indicated that even radial gates without any eccentricity essentially exhibit two inherent vibrations, such as the whole gate rigid vibration around the trunnion pin and the skinplate bending vibration in the streamwise direction, thus inducing a violent coupled-mode self-excited vibration. This study presents the test results for a 1/30-scale and two-dimensional model of Folsom dam radial gates, to demonstrate the non-eccentricity dynamic instability and to verify the theoretical analyses developed for flow-induced coupled-mode vibrations, for its validity.
一般社団法人日本機械学会の論文
2001-08-03