Research on Vibration Isolation of GIS Room in Auxiliary Powerhouse of In-stream Hydropower Station
The effect of damping-spring isolator on the vibration response of GIS room in auxiliary powerhouse of in-stream hydropower station under fluctuating pressure was analyzed by finite element method based on one practical hydropower station. The results show that vibration isolation system has small influence on the vibration characteristic of global auxiliary powerhouse, but the difference of vibration characteristic between floor and its supporting structure is obvious. When the natural frequency of vibration isolation system is between 3.5 and 4.5 Hz, the vibration of floor induced by both low and high frequency fluctuating pressure can be isolated. It’s notable that the vibration responses, especially large vibration velocity and acceleration caused by fluctuating pressure with high frequency, can be reduced to a great extent. Therefore, the vibration isolation system is beneficial to the control of structural vibration.
1.State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan 430072;
2.HydroChina Guiyang Engineering Corporation, Guiyang 550008
Abstract：The effect of damping-spring isolator on the vibration response of GIS room in auxiliary powerhouse of in-stream hydropower station under fluctuating pressure was analyzed by finite element method based on one practical hydropower station. The results show that vibration isolation system has small influence on the vibration characteristic of global auxiliary powerhouse, but the difference of vibration characteristic between floor and its supporting structure is obvious. When the natural frequency of vibration isolation system is between 3.5 and 4.5 Hz, the vibration of floor induced by both low and high frequency fluctuating pressure can be isolated. It’s notable that the vibration responses, especially large vibration velocity and acceleration caused by fluctuating pressure with high frequency, can be reduced to a great extent. Therefore, the vibration isolation system is beneficial to the control of structural vibration.
邹奥斯1，石长征1，伍鹤皋1，金 健2，陈小东2. 河床式水电站副厂房GIS室隔振研究[J]. 振动与冲击, 2015, 34(8): 168-173.
ZOU Ao-si1, SHI Chang-zheng1, WU He-gao1, JIN Jian2, CHEN Xiao-dong2. Research on Vibration Isolation of GIS Room in Auxiliary Powerhouse of In-stream Hydropower Station. JOURNAL OF VIBRATION AND SHOCK, 2015, 34(8): 168-173.
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