Research on Vibration Isolation of GIS Room in Auxiliary Powerhouse of In-stream Hydropower Station

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Journal of Vibration and Shock ›› 2015, Vol. 34 ›› Issue (8) : 168-173.

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.

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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.

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in-stream hydropower station / auxiliary powerhouse / GIS room / vibration isolation / fluctuating pressure / vibration response

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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[J]. Journal of Vibration and Shock, 2015, 34(8): 168-173

References

[1] 陈婧，马震岳，刘志明，等. 水轮机压力脉动诱发厂房振动分析[J]. 水力发电，2004，30(5):24-27.
CHEN Jing, MA Zhen-yue, LIU Zhi-ming, et al. Vibration analysis of power house due to the pressure pulsation of hydro-turbine [J]. Hydroelectric, 2004, 30 (5):24-27.
[2] 赵金旺. 浅谈龙羊峡电站330kVGIS组合电器检修中发现的问题及处理方法[J]. 青海电力，2004，23(1):31-34.
ZHAO Jin-wang. Brief discussion about the overhaul problems treatment of 330kV GIS combination equipment in Longyangxia hydraulic power plant [J]. Qinghai Electric Power, 2004, 23 (1):31-34.
[3] 温钰江. 弹簧隔振技术在火电厂动力机器基础中的应用[J]. 电力建设，2004，25(10):11-13.
WEN Yu-jiang. Application of spring vibration isolated technique in power equipment foundation of thermal power plants [J]. Power Construction, 2004, 25 (10):11-13.
[4] 王新，李同春，赵兰浩，等. 考虑橡胶垫减振的灯泡贯流泵房非线性振动分析[J]. 水力发电学报，2010，29(4):189-193.
WANG Xin, LI Tong-chun, ZHAO Lan-hao, et al. Nonlinear vibration analysis of bulb tubular pump-house with rubber buffers vibration damping [J]. Hydroelectric Engineering, 2010, 29 (4):189-193.
[5] 李守继，楼梦麟，丁洁民，等. 地铁环境中房屋浮置地板隔振分析[J]. 结构工程师，2007，23(5):10-14.
LI Shou-ji, LOU Meng-lin, DING Jie-min, et al. Analysis of floating floor isolation for subway induced vibration [J]. Structural Engineers, 2007, 23 (5):10-14.
[6] 黄尚元，王治虎，骆英，等. 三峡电厂水轮发电机上盖板制造质量控制[J]. 东方电机，2010，38(3):27-30.
HUANG Shang-yuan, WANG Zhi-hu, LUO Ying, et al. Three Gorges hydroelectric power plant on the generator cover manufacturing quality control [J]. Dongfang Electrical Machinery, 2010, 38 (3):27-30.
[7] 徐国宾，张婷婷，王海军，等. 河床式水电站流道水体附加质量计算方法研究[J]. 水利水电技术，2012，43(3):19-22.
XU Guo-bin, ZHANG Ting-ting, WANG Hai-jun, et al. Study on method of calculation on additional mass of water in flow-channel of hydropower station in river channel [J]. Water Resources and Hydropower Engineering, 2012, 43 (3):19-22.
[8] 尹学军，王建立，谷朝红，等. 汽轮机与凝汽器不同联接方式下的弹簧隔振基础设计[J]. 武汉大学学报（工学版），2010，43(增刊):165-170.
YIN Xue-jun, WANG Jian-li, GU Chao-hong, et al. Design features for different connections between turbine and condenser for spring T/G foundation [J]. Engineering Journal of Wuhan University, 2010, 43 (z): 165-170.
[9] Lacey, R.M., Griffin, F.M. Resolving vibration problems on a 25 MW Kaplan unit [J]. International Journal on Hydropower and Dams, 2003, 10(3):84-88.
[10] 练继建，张龑，刘昉，等. 厂顶溢流式水电站振源特性研究[J]. 振动与冲击，2013，32(18): 8-14.
LIAN Ji-jian, ZHANG Yan, LIU Fang, et al. Vibration source characteristics of a roof overflow hydropower station [J]. Vibration and Shock, 2013, 32 (18): 8-14.
[11] 邵杰，刘树红，吴墒锋，等. 轴流式模型水轮机压力脉动试验与数值计算预测[J]. 工程热物理学报，2008，29(5): 783-786.
SHAO Jie, LIU Shu-hong, WU Shang-feng, et al. Numerical simulation and experiment of pressure pulsation in KAPLAN turbine [J]. Engineering Thermophysics, 2008, 29 (5): 783-786.
[12] JBJ-22-1991，隔振设计规范[s].