行波激励下大跨越输电塔—线体系的地震反应分析  

Seismic Response Analysis of Long-Span Transmission Tower-Line System under Traveling Wave Excitations

作　　者：邓凌君[1] 邓洪洲[1] 

机构地区：[1]同济大学建筑工程系,上海200092

出　　处：《华东电力》2010年第1期87-90,共4页East China Electric Power

摘　　要：以500 kV榕江大跨越输电线路工程为背景,基于所建立的输电塔—线体系空间有限元模型,利用时程分析方法研究输电塔—线体系在行波输入下的地震反应,选用3种行波波速对输电塔—线体系进行分析,并与一致激励的地震反应进行比较,结果发现一致激励并不能得到大跨越输电塔的最大不利反应,而受行波波速的影响很大,因此准确估计行波波速对实际工程非常重要。Taking the 500 kV Rongjiang long-span transmission line project as an example; seismic response of trans- mission tower-line system with the input of traveling wave was studied by using analysis method of time history based on a built space finite element model of the transmission tower-line system. Three types of traveling waves velocity were choosed for the investigation of seismic response of transmission tower-line system and compared with the seismic response under uniform excitations, revealing that the response of transmission tower-line system under uniform exci- tations is not critical, but influenced greatly by the traveling wave velocity, which is very important to get accurate estimation of traveling wave velocity in practical projects.

关 键 词：输电塔-线体系 行波效应 视波速 一致激励 地震反应 

分 类 号：TM75[电气工程—电力系统及自动化]