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电网技术  2011 

基于高频天平测力试验的特高压输电塔等效风荷载研究

, PP. 27-32

Keywords: 等效风荷载,特高压输电塔,高频天平测力试验,风振响应

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Abstract:

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。

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