摘要
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。
Vibration of release works under hydrodynamic action is a problem of elastic vibration of water Properties and characteristics of vibration sources are classified into such patterns as turbulence,wake,fluctuation and two-phase flow Turbulence will apply random forces on the structure,bringing about on the whole forced vibration to the structure Wake will form periodic wake in addition to turbulent wake,thus bringing about random or periodic applied forces Coupling with medium or structure,pulsation or oscillation of flow will frequently bring about periodic applied forces Air-water two phase flow includes collapse of bubbles in cavities and motion of air pockets in water,thus bringing about impulsive forces The author sums up the forming conditions and characteristics of different energizing sources and their harms to the project
出处
《人民珠江》
1999年第2期21-26,共6页
Pearl River
关键词
泄水结构
流激振动
水弹性振动
振源
release work vibration energized by flow elastic vibration of water summary
