瓷柱型电气设备支架地震响应动力放大系数研究  

Study on seismic dynamic amplification factor of porcelain cylindrical electrical equipment support

作　　者：孙刚 柏文[1,2] 戴君武 赵霄扬[1,2] SUN Gang;BAI Wen;DAI Junwu;ZHAO Xiaoyang(Key Laboratory of Earthquake Engineering and Engineering Vibration,Institute of Engineering Mechanics,China Earthquake Administration,Harbin 150080,China;Key Laboratory of Earthquake Disaster Mitigation,Ministry of Emergency Management,Harbin 150080,China)

机构地区：[1]中国地震局工程力学研究所地震工程与工程振动重点实验室,黑龙江哈尔滨150080 [2]地震灾害防治应急管理部重点实验室,黑龙江哈尔滨150080

出　　处：《地震工程与工程振动》2025年第1期121-131,共11页Earthquake Engineering and Engineering Dynamics

基　　金：国家自然科学基金项目(52008382)。

摘　　要：地震中瓷柱型电气设备的损坏是电力供应中断的重要原因。准确评估瓷柱型电气设备的抗震性能是评估电力系统抗震能力的重要基础,而支架动力放大系数取值的合理性对评估瓷柱型电气设备抗震性能的准确性有着重要影响。为了得到瓷柱型电气设备支架动力放大系数,文中选取了隔离开关、电压互感器及电流互感器等3种瓷柱型电气设备,开展了设备-支架系统的振动台试验,得到了不同地震动和峰值地面加速度作用下的支架动力放大系数。在此基础上,采用有限元方法,分析了支架刚度等参数对设备-支架系统自振频率的影响,讨论了不同周期的设备支架体系的支架动力放大系数。结果表明:在研究的范围内,支架的动力放大系数随着设备支架整体周期的增加而增加,当设备-支架的整体周期大于T g时,系统的整体地震响应仍然处于较高的水平,明显高于设计谱谱值,且远大于规范规定的1.2,当前规范的放大系数取值保守,建议瓷柱型电气设备的支架动力放大系数取值不宜小于2.0,支架频率不宜小于30 Hz。The failure of porcelain cylindrical electrical equipment during earthquakes is a key factor contributing to power supply outages.The meticulous assessment of the seismic resistance of these devices is a foundational requirement for accurately gauging the overall seismic robustness of power systems.The judicious choice of the support dynamic magnification coefficient plays a crucial role in precisely appraising the seismic behavior of porcelain cylindrical electrical equipment.In this research,to derive the support dynamic magnification coefficients for these devices,vibration tests were carried out on three main types of porcelain cylindrical electrical installations:in cluding disconnect switches,voltage transformers,and current transformers,all of which were evaluated as integrated units with their respective support structures under various seismic excitations and different peak ground acceleration levels.Based on these empirical results,finite element analysis was used to examine the effect of parameters such as the stiffness of supports on the natural frequencies of the equipment-to-support system configurations.This analysis also included a discussion on how the support dynamic magnification coefficients vary with different periodic characteristics of the equipment-support assembly systems.The study findings indicate that,within the scope of this study,the support dynamic magnification coefficient tends to increase as the combined or overall period of the equipment-support system increases.Notably,when the total system period exceeds T g,the seismic response of the system remains at a relatively high level,significantly exceeding the reference values set by design spectra and clearly surpassing the conservative 1.2 limit established by present guidelines,thus implying a potential underestimate of safety margins.Therefore,it is proposed that the support dynamic magnification coefficient for porcelain cylindrical electrical equipment should optimally not be less than 2.0,and concurrently,the frequency of the

关 键 词：瓷柱型电气设备 振动台试验 支架动力放大系数 地震 自振频率 

分 类 号：TM773[电气工程—电力系统及自动化] P315.9[天文地球—地震学]