平面直升闸门流固耦合振动同步测试模型试验研究

Model tests for synchronous measurement of fluid-structure interaction vibration of a plane vertical lift gate

采用三维PIV测速系统和多通道振动数据采集系统,同时监测平面直升闸门在下游淹没出流条件下,水流流场分布及闸门振动参数.结果表明：相同工况下,当闸后漩涡顺水流方向越靠近闸门,此方向的振动位移将达到最大值,峰值比振动位移的均值高出3倍-4倍,离漩涡中心纵坐标越近的测点,其振动参数的峰值较大.随着闸下水流平均流速与湍动能的增加,对同一测点,闸门振动加速度、速度以及位移的峰值都是沿着水流正方向或水流负方向逐步增加的.闸门底缘附近振动的幅度与闸门开度密切相关,闸门开度达到一定值后,对闸门振动已无较大的影响.试验的结论为探索闸门振动机理提供了依据.

The synchronous measurement of flow field distribution after a vertical lift gate and gate vibrating parameters under the condition of submerged discharge at the same time was conducted based on the three-dimensional PIV technique and the multi-channel vibrating data acquisition system . The results showed that when vortexes along the flow direction approach the gate under the same working condition, the vibrating displacements along this direction reach the maximum value,and peak value is 3 -4 times higher than the average vibrating displacement,the closer the measuring point near the ordinate of the vortex center, the larger the peak of vibrating parameters; with increase in the average velocity and turbulent kinetic energy of water flow under the gate, the peak values of the vibrating acceleration, velocity and displacement of the same measuring point increase gradually along the positive direction or negative direction of flow; the gate vibrating amplitude near the gate-bottom is closely related to the gatage, when the gatage reaches a certain value, it has no obvious influence on the gate vibration. The test conclusions provided a basis for exploring the mechanism of the gate vibration.