摘要
结合某河床式水电站实际工程,采用有限单元法,对尾水管内水流脉动压力作用下阻尼弹簧隔振装置对副厂房GIS室的振动影响进行了研究。结果表明:GIS室楼板由隔振弹簧支承于梁柱上后,对副厂房整体结构的振动特性影响很小,GIS室楼板与其支承结构的振动特性差异明显;当隔振系统自振频率在3.5"4.5 Hz时,隔振措施能兼顾隔离低频和高频脉动压力的振动影响,特别是能有效减小因高频脉动压力引起的高振动速度和加速度,对结构振动控制十分有利。
The effect of a damping-spring isolator on the vibration response of GIS room in auxiliary powerhouse of an in-stream hydropower station under fluctuating pressures was analyzed with the finite element method based on one actual hydropower station.The results showed that the GIS room vibration isolation system has a small influence on the vibration characteristics of the global auxiliary powerhouse;but the differences between vibration characteristics of its floor and those of its supporting structure are obvious;when the natural frequency of the vibration isolation system is between 3 . 5 to 4.5 Hz,the vibration of the floor induced by both low and high frequency fluctuating pressures can be isolated;especially,the large vibration velocity and acceleration caused by fluctuating pressures with high frequencies can be reduced effectively,therefore,the vibration isolation system is beneficial to structural vibration control.
出处
《振动与冲击》
EI
CSCD
北大核心
2015年第8期168-173,共6页
Journal of Vibration and Shock
基金
国家自然科学基金资助项目(51179141)
关键词
河床式水电站
副厂房
GIS室
隔振
脉动压力
振动响应
in-stream hydropower station
auxiliary powerhouse
GIS room
vibration isolation
fluctuating pressure
vibration response