【摘要】 针对某输配水工程长输水隧洞中段有压平面闸门的动水启闭过程,根据重力相似准则建立水力学模型以研究闸门动态启闭力和静态持住力的变化特征及闸门底缘的水动力特性。结果表明:闸门的动水启闭力在小开度范围内变化剧烈且最大启闭力发生在相对开度0.05附近,持住力与启闭力随闸门开度变化规律基本一致;与底主梁不开孔方案比较,当底主梁开孔率27%时闸门最大动水启门力和闭门力分别减小5.7%和7.8%,降低幅度较小;该工程设计底缘形式的闸门振动是稳定的,闸门整体结构与水流发生共振的可能性很小,能够保障闸门稳定运行。更多还原

【Abstract】 Based on the gravity similarity criterion,a hydraulic model was built so as to study the variation characteristics of the dynamic hoisting force and static holding force of the gate and the hydrodynamic characteristics of its bottom frontier during the operation process of the pressured plane gate located in the middle of a long water delivery tunnel for a water distribution network. The results show that the hoisting force changes greatly within the range of the small opening degree and the maximum hoisting force occurs near the relative opening degree of 0. 05. The holding force and hoisting force show a similar change with the gate opening. Compared with the non-perforated girder,the maximum opening and closing forces for the bottom girder with an opening rate of 27% decrease by 5. 7% and 7. 8%,respectively,showing a small reduction.The vibration of the gate with a designed type of bottom frontier is stable for the project and resonance of the gate and water flow is nearly impossible,guaranteeing the stability of the gate operation.更多还原