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(浙江省電力設(shè)計(jì)院，杭州 310012)

［摘要］多回路輸電塔由于質(zhì)量與面積沿桿塔高度存在突變，按照規(guī)范公式求解風(fēng)振系數(shù)將偏于危險(xiǎn)。基于桿塔的集中質(zhì)量模型，對(duì)輸電塔風(fēng)振系數(shù)的頻域分析方法進(jìn)行了探討，推導(dǎo)了考慮背景響應(yīng)的等效靜力風(fēng)荷載計(jì)算公式。通過比較闡明了多回路輸電塔風(fēng)振系數(shù)沿塔高的變化特點(diǎn)，分析了背景響應(yīng)分量對(duì)風(fēng)振系數(shù)的影響，并建議在進(jìn)行多回路輸電塔的抗風(fēng)設(shè)計(jì)時(shí)，采用桿塔多階振型的CQC組合計(jì)算等效風(fēng)荷載。

［關(guān)鍵詞］多回路輸電塔；風(fēng)振系數(shù)；等效靜力風(fēng)荷載；集中質(zhì)量模型

中圖分類號(hào)：TU392-3, TU357文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：1002-848X(2011)03-0110-04

Wind vibration coefficient of the multiloop transmission towers

Guo Yong, Ye Yin, Ying Jianguo

(Zhejiang Electric Power Design Institute, Hangzhou 310012, China)

Abstract:The standard formula is inapplicable to solve the wind vibration coefficient because the area and mass of the multiloop transmission towers are discontinuity along the height direction. The frequency domain analysis method of the wind vibration coefficient was discussed and the formula of the equivalent static wind load considering the background response had been deduced based on the lumped mass model of the tower. The features of the coefficient along the height were given and the influence of the background response was analyzed. The CQC combination of the multi-mode vectors was proposed to calculate the equivalent wind load in the wind resistance design of the multi-loop transmission towers.

Keywords:multi-loop transmission tower; wind vibration coefficient; equivalent static wind load; lumped mass model

作者簡(jiǎn)介：郭勇，博士，Email:gy_guoyong@126.com。

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