三峡电站排沙底孔闸门振动水弹性模型研究  

Study on gate vibration of TGP sediment flushing outlets by hydroelastic model

作　　者：吴杰芳[1] 李治江[1] 张晓平[1] 张林让[1] 彭定[1] 叶士林 

机构地区：[1]长江科学院爆破与振动研究所,湖北武汉430010 [2]长江勘测规划设计研究院,湖北武汉430010

出　　处：《长江科学院院报》2004年第4期32-35,共4页Journal of Changjiang River Scientific Research Institute

基　　金：国家重点科技攻关项目(97-312-04-3(1))

摘　　要：采用比尺为13.37的全水弹性模型,研究了三峡电站排沙底孔垂直提升闸门的动力特性、脉动压力和流激振动特性,并对不同上下游水位和门后通气与否对闸门振动的影响作了对比研究,同时还探讨了止水对闸门振动的影响。研究结果表明:闸门不会发生水力共振;通气时闸门上的脉动压力比不通气时小,频谱改变;在上游水位150.0m、下游水位67.5m条件下,门后通气可显著减小闸门振动,在其它水位条件下,由于门后水跃对闸门的冲击,门后通气反而加剧闸门振动。A complete hydroelastic model of vertical lifting gate for TGP sediment flushing outlets with a scale of 1∶(13.37) was manufactured to study its flow induced vibrations. Using this model, the dynamic properties of the gate, the characteristics of gate vibrations and fluctuating pressure acting on gate were investigated.The effects of water level variations and aeration on vibration were also comparatively studied.The results showed that no resonance took place under study conditions; aeration can reduce the fluctuating pressures and change their frequencies; and when downstream and upstream water level was respectively (67.5 m) and (150.0 m) aeration can reduce gate vibrations, however under other test conditions aeration would cause the gate vibrations even stronger due to hydraulic jump attacks.

关 键 词：三峡水利枢纽 排沙孔 垂直提升闸门 水弹性模型 流激振动 

分 类 号：TV135[水利工程—水力学及河流动力学]