小浪底电站1~#孔板洞高水位过流振动观测分析

Analysis on the High Water Flow Vibration Observation of Xiaolangdi Hydropower Station No.1 Orifice Tunnel

介绍了小浪底水电站1#孔板洞高水位过流原型试验中进水塔及左岸山体振动原型观测情况,并对进水塔振动规律进行了总结。结果表明:弧门全开过流时,水流脉动造成的进水塔结构振动响应最大;弧门开度越大进水塔结构振动响应越大,水流能量有一部分转化为结构的振动能量;弧门开度从0.8变化到0.9时,水流量有个骤然变大的过程,从而导致0.9开度与0.8开度下的结构振动有个突变的过程。

The paper introduced the prototype observation to the vibration of intake tower and left bank mountain in the prototype test of Xiaolangdi hydropower station i # high water flow orifice tunnel, and also summarized the vibration law of intake tower and left bank mountain. The results show that the vibration response of the intake tower caused by water fluctuation is the biggest when the arc door is fully open. The greater the arc door open, the larger the vibration of the intake tower response, because part of the flow energy is converted to structural vibration. There is an ab- rupt change process to the flow energy when are door open from 0.8 degrees to 0.9 degrees, which results in a mutation process to the structural vi- bration in the 0.9 degrees and 0.8 degrees of the arc door opening.