基于高频天平测力试验的500kV单回路输电塔风致响应研究  

Wind-induced response of a 500 kV single-circuit transmission tower based on high-frequency force-balance technique

作　　者：张庆华[1,2] 顾明[2] 

机构地区：[1]华北水利水电大学,郑州450011 [2]同济大学土木工程防灾国家重点实验室,上海200092

出　　处：《振动与冲击》2014年第4期156-160,172,共6页Journal of Vibration and Shock

基　　金：国家自然科学基金重点项目(50638010);科技部国家重点实验室基础研究资助项目(SLDRCE08-A-03);河南省教育厅科学技术研究重点项目(13A560691)

摘　　要：基于高频测力天平风洞试验的结果,采用平稳激励下随机振动的模态叠加法,计算了典型500kV单回路酒杯型输电塔的风致响应。结果表明:输电塔结构顺风向和横风向脉动位移响应、加速度和基底弯矩值都较大,横风向响应值甚至大于顺风向。各个方向一阶振型在响应中起主导作用。位移阵风响应因子和基底弯矩响应因子随风向变化趋势相近,顺风向关键节点位移响应因子最大值不超过1.8,弯矩响应因子约为1.5。Wind-induced responses of a 500kV single-circuit transmission tower were computed based on wind forces acting on the tower obtained from wind tunnel tests using high-frequency force-balance technique and the modal superposition method.The results showed that the dynamic response displacements,accelerations and base bending moments （BBM）are all large in both along and across wind directions,and furthermore,the across wind dynamic responses are generally larger than the along wind responses;the first mode has dominant contributions to the total response in both the two wind directions;in addition,the displacement gust response factor and the BBM response factor have similar trends;the maximum displacement gust response factor in along wind direction of key nodes is no more than 1.8,and the maximum moment gust response factor is about 1.5.

关 键 词：输电塔 风洞试验 模态叠加法 风致响应 阵风响应因子 

分 类 号：TU761.3[建筑科学—建筑技术科学]