摘要
汶川地震震害调查表明,管母线连接电气设备在地震中破坏情况严重。为了研究此类设备的地震响应,建立了管母线连接电气设备耦联体系的有限元模型,采用时程分析法对模型进行了地震响应分析,比较单体设备和管母线连接设备的动力特性和地震响应,并且探讨了管母线不同设置方式对连接系统的影响。分析结果表明,管母线连接设备系统中,高频设备的位移响应较其独立设备时放大,低频设备的位移响应较其独立时减小;在耦联系统中,伸缩节与低频设备连接时耦联系统的动力响应小于伸缩节与高频设备连接时系统的动力响应。进行管母线连接的电气设备抗震设计时,应充分考虑电气设备的动力特性和伸缩节的设置方式。
Substation equipment interconnected by rigid bus was badly damaged during the Wenchuan Earthquake.In order to study the seismic response features of this type of equipment,a FEM model was established for the coupling system of the substation equipment interconnected by rigid bus and a time-history analysis was conducted on the model＇s seismic response.The dynamic properties and seismic responses of the independent equipment and the equipment in the coupling system were compared,and the impact of different arrangement of rigid bus on the connection system was studied.The results show that the equipment with high frequency in the coupling system has larger displacement than that of independent equipment.Seismic responses can be reduced when the flexible strap connector connects with the equipments with lower frequency in the coupling system.Dynamic property of the substation equipment and the arrangement of flexible strap connector should be considered in the seismic design of equipment interconnected by rigid bus.
出处
《电力建设》
2010年第7期22-28,共7页
Electric Power Construction
基金
教育部霍英东教育基金会青年教师基金优选资助课题(114021)
国家电网公司科技项目(SGKJJSKF2008-508)
关键词
汶川地震
管母线
变电站
电气设备
地震易损性
时程分析
Wenchuan Earthquake
rigid bus
substation
electric equipment
seismic vulnerability
time-history analysis
