大跨度上翻式拱形钢闸门振动特性及抗振优化

针对大跨度上翻式拱形钢闸门的水力结构特点,研制了闸门水弹性振动模型,通过水动力荷载特性、结构动力特性和流激振动特性等系统试验研究,反演了闸门结构的共振现象,取得不同工况下作用于门体的水流脉动压力荷载和闸门振动加速度、动位移及动应力等动力响应参数的数字特征和谱特征。针对存在问题,对闸门结构的底缘体型进行了修改,取得了良好的抗振优化效果。

Vibration characters and anti-vibration optimization of long-span-flip arch steel gates

Based on the hydraulic characters of long-span-flip arch steel gates,a hydro-elastic vibration model was developed.The resonance phenomenon of the gate structure was inversed by studying the hydrodynamic loads,structural dynamic characters and flow-induced vibration system.The numerical and spectral characters of dynamic response parameters acting on gate structure under different working conditions such as flow fluctuating pressure load,gate vibration acceleration,dynamic displacement and stress were obtained.Against the existing problems,the bottom edge of the gate structure was modified,and good anti-vibration optimized effect was achieved.