【作者】 叶发文； 彭勇； 殷荣岗； 张建民； 张建海；

【Author】 YE Fa-wen;PENG Yong;YIN Rong-gang;ZHANG Jian-min;ZHANG Jian-hai;State Key Laboratory of Hydraulics and Mountain River Development and Protection,Sichuan University;College of Water Resources & Hydropower,Sichuan University;

【机构】 四川大学水力学及山区河流开发与保护国家重点实验室； 四川大学水利水电学院；

【摘要】 针对某水电站由泄洪引发的近场振动,在水力学模型试验采集的动水压力基础上,采用三维动力有限元法选取单、双池运行条件下各九个工况计算近场动力响应。根据工程关心的A处的位移、速度及加速度响应结果,拟合得到了振动响应与泄流量的振动响应关系公式。研究表明,A处的振动响应可以用对数函数表示,总体上振动响应随流量增大而增大。单池条件运行时,当流量达到约18000m~3/s,A处振动强度趋于稳定;双池条件运行时,流量达到约36000 m~3/s时,A处振动强度趋于稳定。更多还原

【Abstract】 In order to study the law of the near-field vibration caused by the stilling pool in a hydropower station,the dynamic hydraulic pressure is measured through hydrauhc model test,then 3D-FEM is applied to calculate dynamic response of the near field under 9 different discharge cases corresponding respectively to right pool in working condition and both right and left pools in working condition.And the vibration law of Position A in concern can be fitted with the water discharges.As the fitted equations show,logarithmic function can be used to express the relation between near field vibration and water discharges.In general,the calculated results increase with water discharges.When the water discharge is up to 18000 m~3/s with the right pool working,the vibration in Position A tends to become steady,and when the water discharge.reaches about 36000 m~3/s with the right and left pools working,the vibration in Position A tends to become steady.更多还原