摘要
针对黄金坪水利工程的溢洪道在泄流时引起周围环境振动的问题,通过现场振动测试试验,分析了不同流量、不同闸门开度条件下各测点的振动情况。分析得出:振动影响随着与振源距离的增大而减小;同一位置所受的振动影响随着泄流量的增大而增大;该工程三孔闸门在相同开度泄流时对周边环境的影响相对较小;浸水村楼房第一阶自振频率基本为9.002 Hz以下,而坝体泄洪各测点振动频率均集中在低频部分,有可能会引起共振现象。
In view of the environmental vibration caused by spillway discharge in Huangjinping water conservancy project,the vibration of various measuring points under different discharge and gate opening conditions is analyzed through field vibration test.The results show that the vibration effect decreases with the increase of distance from the source,and the vibration effect at the same location increases with the increase of discharge.And,when the three gates discharge with the same opening,the impact on the surrounding area is relatively small.In addition,the first natural frequencies of most buildings in Jinshui village are basically below9.002Hz,and the vibration frequencies of all measuring points of dam body during discharge are concentrated in the low frequency range,which may cause resonance phenomenon.
出处
《大坝与安全》
2018年第6期61-65,74,共6页
Dam & Safety
关键词
黄金坪水电站
泄流
振动测试
模态分析
Huangjinping hydropower station
discharge
vibration test
modal analysis
