柘溪水电厂事故闸门振动原因及减振措施研究  

Study on the cause and suppression of emergency gate vibrations at Zhexi hydropower station

作　　者：付亮[1] 陈龙[2] 张晓曦[2] 程永光[2] 莫剑[3] 

机构地区：[1]湖南省电力公司科学研究院,长沙410007 [2]武汉大学水资源与水电工程科学国家重点实验室,武汉430072 [3]湖南省电力公司,长沙410007

出　　处：《水力发电学报》2014年第1期207-214,共8页Journal of Hydroelectric Engineering

摘　　要：柘溪水电厂事故闸门在机组甩负荷过渡过程中出现了明显振动,致使闸门反向支承损坏,影响电厂安全运行。本文采用计算流体动力学的刚性结构流固耦合模拟方法,对水电站过渡过程中闸门井内流态及闸门振动情况进行数值模拟。研究表明:闸门前后水位差动产生的不平衡力是闸门振动的根本原因。从减小水位差动以降低不平衡力的角度出发,提出了两种减轻闸门振动的措施,并通过与原方案对比分析验证了其良好的效果。Violent vibrations of emergency gates during load rejection have been observed at the Zhexi hydropower station, and this caused the slide rods broken and other negative effects on the station＇s operation. In this article, a fluid-structure interaction method of computational fluid dynamics is applied to a study of the vibration cause. An extensive analysis of flow characteristics and vibration conditions reveals that the breaking of slide rods was originated from a difference between the pressures on the front and rear sides of the emergency gate and a resultant force on the gate structure. Two schemes aiming at reduction of the pressure difference were suggested and examined through flow simulations and they were compared with the existing condition. The results show that these schemes are quite effective.

关 键 词：水电工程 流激振动 计算流体动力学 事故闸门 

分 类 号：TV663[水利工程—水利水电工程]