平板闸门流激振动效应对启门力的影响

为探究流激振动对闸门启闭力的影响机理,通过对固定的上、下游水位和底缘形式的平板闸门进行流固耦合分析,结果表明引起闸门振动的激振力和由闸门振动位移产生的摩擦系数和摩擦力臂的变化是造成启闭力变化的主要原因。在前人统计的闸门振动较大的不利开度的基础上,利用波形合成法以及振动理论提出作用于闸门面板上的激振力的计算公式,并考虑其对闸门启门摩擦系数、摩擦力臂以及启门摩擦力的影响,总结出流激振动效应下平板闸门启门力的计算方法。通过与石泉水电站中孔平板闸门启门力实测资料对比发现,理论计算的结果与实际工程的实测值吻合良好,可为实际工程的启闭力计算提供一定的科学依据。

Influence of flow vibration effect of flat gate on opening force

In or der t o ex plor e t he mechanism of the influence of flow2induced vibr ation on the o pening and closing for ce of the gate, the f luid2so lid coupling analysis o f the plane g ates in the form of fix ed upper and low er w ater level and bo ttom edg e show ed that t he ex citing force causing the v ibration. The variation of frict ion arm and coefficient o f friction caused by v ibratio n displacement of the gate w ere the main causes of the change of the o pening and closing for ce. On the basis of the unfav orable opening deg ree of the g ate vibr ation calculated by the predecessors, t he ca lculatio n formula o f the ex citing fo rce acting o n the gate panel w as pro po sed by the w avefo rm sy nthesis metho d and the vibrat ion t heo ry . The f rictio n coefficient and f rictio n for ce of the gate w ere consider ed in the calculation met ho d of the o pening for ce of the plane gates under the effect o f the flow vibr ation. Comparing w ith the measur ed data of the middle plate o f t he Shiquan H ydro power Statio n, the theor et ical calculatio n r esults wer e in g oo d ag reement with t he actual measured v alues, w hich can prov ide a scient ific basis for the calculation of the o pening and closing for ce o f the actual pr oject.