摘要
以建设中的向家坝-上海、锦屏-苏南±800kV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,进行了气弹模型风洞试验及高频天平测力试验。利用高频动态测力天平基本原理,在脉动风荷载准定常假设的基础上,估计出输电塔脉动风荷载的空间分布。然后对输电塔进行风振响应分析,并与气弹模型风洞试验的结果进行了对比。计算结果表明:该方法能较好反应风荷载空间分布特性,是对高频天平测力实验局限性的一种可靠方便的扩展,并能很好的反应输电塔结构的横风向风振响应。
Taking the ±800kV ultra-high voltage （UHV） transmission project begging constructed fron XiangJiaBa to ShangHai, and from JinPing to SuNan as the research background, and according to the feature tha the wind-induced response of transmission tower is complex, aeroelastic model wind tunnel tests and higi frequency force balance （HFFB） tests are performed. According to the deficiencies in HFFB technique and quasi-steady suppose of pulse wind, a method for simulating spatially distr/buted wind forces acting ol transmission tower is presented. The wind-induced response analysis for the transmission tower has been done and compared with the aeroelastic model wind tunnel tests results. The actual observations demonstrate that the spatial distribution characteristics of the wind loading of the transmission tower can be effectively investigated by using the presented approach. The method can extend the application of HFFB technique in wind tunnel tests, and reflect the across-wind-induced response of the transmission tower accurately.
出处
《工程力学》
EI
CSCD
北大核心
2010年第4期218-225,共8页
Engineering Mechanics
基金
国家自然科学基金项目(50678181
50708118)
国家电网公司科技项目(SGKJ[2007]413)
关键词
输电塔
风洞试验
高频天平测力试验
风振响应
特高压
transmission tower
wind tunnel tests
high frequency force balance tests
wind-induced response
UHV
