台阶式溢流坝消力池底板脉动压强特性研究  

Research on Fluctuating Pressure Characteristics in Stilling Basin Floor of Stepped Spillway

作　　者：赵相航 解宏伟[1] 郭馨[1] 

机构地区：[1]青海大学水利电力学院,西宁810016

出　　处：《中国农村水利水电》2016年第12期120-123,共4页China Rural Water and Hydropower

摘　　要：为了研究台阶式溢流坝不设反弧段连接时消力池底板脉动压强特性,采用物理模型试验方法,对某水库台阶式溢流坝消力池底板脉动压强特性进行了研究。结果表明,消力池底板脉动压强是随时间变化的平稳随机过程;脉动压强强度和峰值沿程先逐渐增大,在水流冲击区出现最大值,最大值可达1.198 k Pa,随后沿程逐渐减小,且随上游来流量的增加而增大;水跃区脉动压强随台阶高度的降低而增加;消力池底板脉动优势频率为0.01-4 Hz,属低频振动,其概率密度分布为偏态分布。To study the fluctuating pressure in stilling basin floor of stepped spillway with no anti-arc, the fluctuating pressure in stilling basinfloor of stepped spillway is studied by physical model test method.The results show that fluctuating pressure is time-varying stationary randomprocess in the stilling basin floor. Fluctuating pressure intensity and peak value increase gradually along the first, and reach the maximum inflow impacting area, the maximum is 1.198 kPa, then decrease gradually, and increase with an increase in flow traffic. With the decrease instep height, fluctuating pressure increases in hydraulic jump area.The dominant frequency of fluctuations is 0.01- 4 Hz, it belongs to the low-frequency vibration, and the probability density is skewness distribution.

关 键 词：消力池 脉动压强 频率 台阶式溢流坝 

分 类 号：TV641.4[水利工程—水利水电工程]