摘要
强震作用会对输电塔造成巨大的破坏,其中特高压直流输电塔因其高度高、柔度大,对地震载荷作用更敏感。建立了三基±800kV特高压直流输电塔模型,采用有限元软件进行多维地震动模拟,对比分析了不同呼称高度的特高压直流直线塔、耐张塔的多维地震动特征。研究结果表明:呼高较高的输电塔在多维地震激励下的响应明显大于呼高低的输电塔;同时,耐张塔的响应比直线塔的响应小。因此为提高输电线路的抗震能力,应适当降低输电塔的呼称高度,并且增加耐张塔的数目。
A huge damage will be caused by violent earthquake on transmission tower,especially in ultra-high voltage direct current(UHVDC)transmission,for its high altitude and flexibility.Three finite element models of the±800 kV transmission tower were established and the multi-component seismic wave simulation analysis was carried out by finite element software.The seismic responses of straight-line tower are analyzed in different nominal height,and the differences between straight-line tower and multi-circuit strain tower.The results show that the responses on high nominal height are significantly larger than those on low nominal height.Meanwhile,the responses on straight-line tower are larger than those on multi-circuit strain tower.Thus,in order to improve the seismic capacity of transmission line,the nominal height of transmission tower should be reduced and the number of multi-circuit strain tower should be increased.
作者
黄增浩
龚博
张志强
张志尧
冯亮
安利强
HUANG Zeng-hao;GONG Bo;ZHANG Zhi-qiang;ZHANG Zhi-yao;FENG Liang;AN Li-qiang(Electric Power Research Institute,China Southern Power Grid,Guangzhou 510663,China;Department of Mechanical Engineering,North China Electric Power University,Baoding 071000,China)
出处
《科学技术与工程》
北大核心
2019年第23期120-125,共6页
Science Technology and Engineering
基金
广东省中国南方电网有限责任公司科技项目(0002200000037332)资助
关键词
特高压直流输电塔
多维地震波
呼称高度
抗震能力
ultra-high voltage direct current transmission tower
multi-component seismic wavenominal heightanti-seismic capacity