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中文摘要：
锦屏一级水电站大坝作为目前世界最高双曲拱坝,对于高水头水垫塘振动安全问题最为显著。基于锦屏一级高拱坝水垫塘泄洪振动原型观测试验,分析研究了在不同组次下水垫塘底板的振动响应,研究结果表明锦屏一级水垫塘底板在深孔单独泄洪时振动强度沿程逐渐增大,在表孔单独泄洪和表深孔联合泄洪时水舌在水垫塘附着点水流紊动剧烈,振动强度大;底板振动的优势频率基本分布在0.3-1.3 Hz之间,属于水流脉动的频率范围,在水流荷载作用下,底板做受迫振动;各相邻测点底板振动有很好的相关性;各组次底板振动的空间积分尺度都维持在45m以上,底板的整体性和结构完好。给锦屏一级水电站合理调度、科学的运行以及下游泄洪建筑物的运行安全提供了参考。
英文摘要：
Jinping-ⅠDam is the highest hyperbolic arch dam in the world.Vibration and safe protection of plunge pool is particularly significant.Based on the spillway vibration test archetypal observation of plunge pool of Jinping-Ⅰarch dam,the flow-induced vibration response of slabs in plunge pool in different groups were analyzed and studied.The results showed Jinping-I plunge Pool vibration intensity increased along the way at a separate middle outlets flood,slabs had serious vibration in plunge pool during surface outlet and both surface and middle outlet discharge;the dominant frequency of vibration of slabs was distributed between 0.3and 1.3Hz,belonging to the frequency range of fluctuating,the slabs had forced vibration under water load;the correlation of slabs vibration between adjacent measuring points was remarkable,the spatial integral scale of slabs vibration was kept above 45 min all groups,the integrity and structure of the slabs were good.The results had a certain reference value for reasonable dispatching,scientific operational and protection of the safe operation of the downstream flood releasing structure of Jinping-Ⅰhydropower station.
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