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水动力作用下的泄水结构振动是一个水弹性振动问题,按振源的性质与特征分为紊流、尾流、波动及两相流等类型。紊流对结构产生随机作用力,一般使结构产生强迫振动;尾流除紊流尾流外,还可能形成周期性尾流,因而可能产生随机性或周期性作用力;水流波动或振荡往往与介质或结构耦合产生周期性作用力;水气两相流包括空穴泡溃灭及水中气囊运动产生冲击性作用力。综述不同性质激励源的发生条件、特征及其对工程的危害
The vibration of the drainage structure under hydrodynamic action is a hydro-elastic vibration problem, which is divided into turbulence, wake, fluctuation and two-phase flow according to the nature and characteristics of the vibration source. Turbulence generates random forces on the structure and generally causes forced vibration of the structure. The wake may form a periodic wake in addition to the wake of the turbulent flow, which may result in random or periodic forces. Fluctuations or oscillations in the flow often involve Medium or structural coupling generates periodic forces; water-vapor two-phase flow includes hole bubble collapse and water balloon movement impact. Summarize the occurrence conditions and characteristics of different kinds of incentive sources and their harm to the project