汗华水电站表孔弧形闸门流激振动试验

采用完全水弹性相似模型试验的方法,对巴基斯坦汗华水电站表孔弧形闸门的流激振动情况进行了研究.动力响应试验结果表明:大弧门和舌瓣门的自振频率均避开了水流脉动压力高能区,运行中可避免因振动频率相近而引发的自激振动.另一方面,闸门振动加速度的大小与止水设置情况密切相关,在闸门运行过程中,应尽量避开加速度最大和动应力最大的工况.

Experimental research on flow-induced vibration for spillway radial gate of Khan Khwar Hydropower Station

Due to its lightness,reasonable force distribution,radial gate is widely used in hydraulic engineering.Studies were conducted under the experiment of hydro-elastic model test of the spillway gate of Khan Khwar Hydropower Station.Dynamic response results show that both the large radial gate and the flap gate shun the high-energy zone of flow frequency and this can avoid the self-excited vibration caused by the similar vibration frequency.On the other hand,the acceleration of vibration is closely related to the form and distribution of the water seal; the high dynamic stress and acceleration should be avoided when possible.