摘要
以建设中的向家坝—上海、锦屏—苏南±800 kV特高压直流输电线路工程为背景,针对输电塔风致响应复杂的特点进行高频天平测力试验。利用高频动态测力天平基本原理,考虑输电塔截面收缩的影响,给出输电塔气动模型的模态修正系数;并对输电塔等效风荷载进行研究,分别计算了输电塔的背景响应和共振响应。计算结果表明,基于高频天平测力试验的修正振型法能较好地计算输电塔结构的风振响应及等效风荷载,是对高频天平测力试验局限性的一种可靠方便的扩展。
Taking the ±800kV DC power transmission project from Xiangjiaba to Shanghai and that from Jinping to Sunan as the research background and in allusion to the complex charateristics of wind-induced response of UHVDC transmission towers, the high frequency force balance （HFFB） tests are performed. According to the basic principle of HFFB and considering the influence of size contraction of the transmission tower, the modal correction factor of the aerodynamic model of the transmission tower is given; the equivalent wind-load of the transmission tower is researched, and then the background response and resonant response of the transmission tower are calculated respectively. Calculation results show that the HFFB-based modified vibration mode can calculate the wind-induced response and equivalent wind loads of transmission tower better, and the proposed method is a reliable and convenient expansion to the limitation of HFFB tests.
出处
《电网技术》
EI
CSCD
北大核心
2011年第5期27-32,共6页
Power System Technology
基金
国家自然科学基金项目(50678181)
教育部中央高校基本科研业务费专项资金资助项目(CDJRC10200002)
重庆市科委自然科学基金计划资助项目(2010BB9207)~~
关键词
等效风荷载
特高压输电塔
高频天平测力试验
风振响应
equivalent wind loads
ultra high voltage （UHV） transmission tower
high frequency force balance （HFFB） tests
wind-induced response
