- 摘 要
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（華北電力大學(xué)機(jī)械工程系， 保定 071003）
［摘要］具有高柔性的特高壓單柱拉線塔對風(fēng)荷載十分敏感，風(fēng)振系數(shù)的確定是其設(shè)計(jì)和應(yīng)用的基礎(chǔ)。建立了特高壓單柱拉線塔塔線體系的有限元模型，闡述了基于振型疊加法的風(fēng)振系數(shù)計(jì)算方法，考慮結(jié)構(gòu)的前兩階振型的影響，基于時(shí)程分析的數(shù)據(jù)計(jì)算了單柱拉線塔的風(fēng)振系數(shù)。結(jié)果表明：主柱上存在橫隔材的位置風(fēng)振系數(shù)會(huì)發(fā)生突變；時(shí)程分析得到的加權(quán)風(fēng)振系數(shù)與按照荷載規(guī)范計(jì)算得到的加權(quán)風(fēng)振系數(shù)較為接近；等效靜力風(fēng)荷載作用下，迎風(fēng)側(cè)主材軸力與風(fēng)振響應(yīng)的最大值較為接近，且大于平均風(fēng)下主材的軸力。
［關(guān)鍵詞］特高壓； 單柱拉線塔； 風(fēng)振系數(shù)； 有限元
中圖分類號(hào)： P512.2+1 文獻(xiàn)標(biāo)識(shí)碼： A文章編號(hào)： 1002-848X(2016)S2-0426-05
Analysis on windinduced vibration coefficient of UHV single-mast guyed tower
Gao Song， Yang Wengang， Zhu Bowen
(Department of Mechanical Engineering, North China Electric Power University， Baoding 071003, China）
Abstract: The high-flexible UHV guyed single-mast tower is sensitive to wind load, the determination of wind-induced vibration coefficient is the basic of its design and application. The finite element model of UHV guyed single-mast transmission tower-line system was build. The computing method of wind-induced vibration coefficient based on mode superposition method was stated. In consideration of the influence of the first and second mode of the structure, the wind-induced vibration coefficient of guyed tower was calculated based on the data of time history analysis. Result shows that the wind-induced vibration coefficient changes suddenly on transverse. The weighted average of wind-induced vibration coefficient calculated by time history analysis is very close to that according to GB 50009—2012. Windward leg member′s axial force under equivalent static wind load is very close to the maximum of wind-induced response and it′s bigger than that under mean wind load.
Keywords: ultra high voltage； single mast guyed tower； wind-induced vibration coefficient； finite element
作者簡介：高松，碩士研究生，Email：gaosongv1015@163.com。
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