摘要
瓷柱型电气设备由于结构高耸、阻尼小等特点在地震中极易发生破坏。现有瓷柱型电气设备的加固措施均不能充分保证该类设备在地震发生时的安全运行。本文基于调谐质量阻尼器原理,结合瓷柱型电气设备中心对称的结构特点,提出了多重环式调谐质量阻尼器(MRTMD)的概念并设计了相应的三重调谐质量阻尼器减震装置,推导了对应的减震方程。文中以2个不同型号的电压互感器为例,通过有限元模拟,对比了该设备有控和无控时的动力响应。此外,考虑到导线及裹冰荷载的影响,本文研究了MRTMD控制频率偏移最佳控制频率时的减震效果。结果表明:MRTMD可以明显增强瓷柱型电气设备的抗震性能,实现任意方向的地震动减震;MRTMD对于不同类型的地震动均具有良好的鲁棒性;当控制频率发生50%偏移时,MRTMD仍然可以保持稳定的减震效果。
High-Rise Porcelain Cylindrical Electrical Equipment（ HRPCEE） is vital for power delivery system and is fragile during earthquakes. The existing HRPCEE damping methods have shortages that can not protect the HRPCEE sufficiently. Based on the tuned mass damping theory and HRPCEE characteristics,a new damping device named multiple ring tuned mass dampers（ MRTMD） is proposed. Through a real case study,the dynamic responses of the potential transformer under earthquakes with and without control are compared. Furthermore,in order to evaluate the adverse influence of conduction connections and icing loads,three different MRTMD stiffness distribution schemes are carried out to discuss the MRTMD damping effect when there are deviations. Numerical simulation results show that MRTMD is both effective and robust in enhancing HRPCEE seismic performance.
出处
《地震工程与工程振动》
CSCD
北大核心
2016年第3期111-117,共7页
Earthquake Engineering and Engineering Dynamics
基金
国家自然科学基金项目(51478442,51408565)~~
