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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 construction of Xiangjiaba - Shanghai, Jinping - Sunan ± 800kV UHVDC transmission line project as the background, aiming at the complex wind - induced response of transmission towers, aeroelastic model wind tunnel test and high frequency balance force test . Based on the basic principle of high-frequency dynamic force balance, based on the constant assumption of fluctuating wind load, the spatial distribution of fluctuating wind load of transmission tower is estimated. Then the wind-induced vibration response of the transmission tower is analyzed and compared with the results of the aeroelastic model wind tunnel test. The calculation results show that this method can reflect the spatial distribution of wind load better and is a reliable and convenient extension of the limitations of the high-frequency force measurement test, and can well reflect the wind-induced wind-induced vibration response of transmission towers.