基于大涡模拟和Newmark HHT方法的闸门垂向 自激振动数值模拟

当平底缘平板闸门部分开启且上下游存在水位差时，在一定的折算速度范围内闸门会发生强烈的自激振动，而且闸门底缘有漩涡产生。本文用基于流固耦合数值模拟方法研究了闸门垂向自激振动，通过采用大涡模拟和Newmark HHT方法对不同工况下闸门自激振动进行了计算，计算结果和实验结果吻合，通过数值模拟图像进一步揭示了闸门自激振动机理。

LES and Newmark HHT based numerical simulation on self-excited vertical vibration of plane gate

When the plane gate with flat-bottom edge is partly opened with a water level difference between the upstream and downstream，a strong self-excited vibration of the gate will occur within a certain range of superficial velocity，and then eddy will arise at the bottom edge of the gate. The self-excited vertical vibration of the gate is studied herein based on fluid-solid coupling numerical simulation，i.e. the self-excited vibration of gate under various operation conditions is calculated with LES （Large eddy simulation）and Newmark HHT; from which the calculated result coincides with that from the relevant experiment. The mechanism of the self-excited vibration is further revealed in the accordance with the numerical simulated images concerned.