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针对黄河柳园口渠首涵闸闸门启闭时出现强烈振动的情况,重点对启门、闭门过程中启闭杆受力的变化特点及门后水压力的脉动变化规律进行了观测、分析。结论认为:门后水流的脉动变化及闸门重量正好在振动危险区是闸门振动的主要原因。建议在今后新建或改建水闸时,应注意调整门后水流流态,减小闸门传力结构各部分的间隙,避免门体结构的固有频率与水流的脉动频率同步,以达到防振或减振的目的。
Aiming at the situation of strong vibration when the sluice gates of Liuyuan canal in the Yellow River opened and closed, the variation characteristics of the retractable rod in the process of opening and closing the door and the variation of the pulsation of the pressure behind the door were observed and analyzed. The conclusion is that the fluctuating gate flow and gate weight are the main reasons for the gate vibration in the vibration danger zone. It is suggested that when new sluice is constructed or reconstructed in the future, attention should be paid to adjusting the flow pattern of the water flow behind the door to reduce the gap between various parts of the sluice force transmission structure and to prevent the natural frequency of the door structure from synchronizing with the pulsating frequency of water flow, the goal of.