向家坝水电站导流底孔平面封堵闸门拟采用液压张紧钢绞索设备进行启闭。这是水电系统首次采用该设备，由于该设备启闭闸门速度慢，且门体大、水头高，故闸门的流激振动安全问题备受关注。采用 1∶30 的水弹性模型试验和有限元计算相结合的方法，获得了试验与计算相互验证的闸门动力特性参数和闸门结构的静、动应力以及闸门上的脉动压力特性、振动特性等研究成果。表明：闸门在启闭过程中不会发生水力共振，闸门的振动比较小，是安全的。研究发现，门后负压对闸门安全运行有较大负面影响，门后增设通气孔改善了闸门的受力条件并减小了启闭力，据此建议门后增设通气孔。由于闸门摩擦力大，建议给闸门添加配重，以便顺利关闭。

Hydraulic tensioning steel halter is planned to be equipped for the opening and closing of the slide plane gate at the bottom outlet of Xiangjiaba dam. It is the first to install this equipment in hydropower projects. The flow-induced vibration of the gate is highly concerned as the large-sized gate opens and closes at the speed of 5m /h with high water head. Hydroelastic 1 ∶ 30 model and numerical model are employed to obtain the dynamic properties, the static and dynamic stresses of the gate structure, the fluctuating pressure on the gate and the vibration characteristics, all of which are verified by tests and calculations. The study finds no resonance during the closing and opening of the gate, which thus is dynamically safe with small vibration. In addition, it is suggested to set up aeration facilities at the entrance of the bottom outlet to release the negative pressure on the back of gate and add extra weight to the gate to enable it closing easily.