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1、第44卷第11期土木工程學(xué)報(bào)Vol_44No．112011年11月CHINACⅣILENGINEERINGJOURNALNOV．2011覆冰導(dǎo)線氣彈模型舞動(dòng)風(fēng)洞試驗(yàn)研究樓文娟王昕許福友(1．浙江大學(xué)結(jié)構(gòu)工程研究所，浙江杭州310058；2．大連理工大學(xué)建設(shè)工程學(xué)部，遼寧大連116024)摘要：制作了D形和新月形兩種典型覆冰斷面的單根及分裂覆冰輸電導(dǎo)線氣彈模型，通過調(diào)整導(dǎo)線模型的彈簧剛度、懸掛點(diǎn)位置和配重質(zhì)量獲得不同豎向／扭轉(zhuǎn)自振頻率比，并調(diào)整風(fēng)攻角和風(fēng)速，在風(fēng)洞中激發(fā)并記錄D型單根覆冰導(dǎo)線和新月形二分裂、四分裂覆冰導(dǎo)線的舞動(dòng)現(xiàn)象。D型單根覆冰導(dǎo)線在豎向／扭轉(zhuǎn)自振頻率比接近和遠(yuǎn)離
2、時(shí)均能觀察到舞動(dòng)現(xiàn)象；而新月形二分裂、四分裂覆冰導(dǎo)線只在豎向／扭轉(zhuǎn)自振頻率比接近時(shí)發(fā)生舞動(dòng)。試驗(yàn)結(jié)果表明：豎向／扭轉(zhuǎn)自振頻率比將影響導(dǎo)線舞動(dòng)穩(wěn)定性，相同覆冰斷面的分裂導(dǎo)線與單根導(dǎo)線表現(xiàn)出不同的舞動(dòng)穩(wěn)定性特征，導(dǎo)線扭轉(zhuǎn)響應(yīng)對(duì)導(dǎo)線舞動(dòng)的產(chǎn)生及舞動(dòng)過程中的豎向運(yùn)動(dòng)響應(yīng)均有較大影響。關(guān)鍵詞：舞動(dòng)；覆冰導(dǎo)線；風(fēng)洞試驗(yàn)；氣彈模型中圖分類號(hào)：TU311．3文獻(xiàn)標(biāo)識(shí)碼：A、文章編號(hào)：1000-131X(2011)l1-0018-06AwindtunnelstudyongallopingofanaeroelasticicedconductormodelLouWenjuanWangXinXuFuy
3、ou(1．InstituteofStructuralEngineering，ZhejiangUniversity，Hangzhou310058，China；2．FacultyofInfrastructureEngineering，DalianUniversityofTechnology，Dalian116024，China)Abstract：Singleandbundlediced·-conductoraeroelasticmodelswerefabricatedfortwotypicalicecoatingD-shapeandcrescent—shapesections．Th
4、everticaltorotationalmodefrequencyratiooftheaeroelasticmodelcanbechangedbyvaryingspringstifness，suspensionpositionandadditionalweight．Afteradjustingtheratioofverticaltorotationalmodefrequency，windspeedandattackangle，gallopingofsingleDsectioniced-conductor，two—bundledandfour—bundledcrescentse
5、ctioniced—conductorswereexcitedinthewindtunne1．GallopingofsingleDsectioniced．conductorcanbegeneratedwhethertheverticalandrotationalself-vibrationfrequencyiscloseornot．However，gallopingoftwo—bundledandfour—bundledcrescentsectioniced—conductorsrequirescloseverticalandrotationalfrequency．Result
6、sfromthewindtunneltestindicatethattheratioofverticaltorotationalself-vibration~equeneysignificantlyaffectsthestabilityofgalloping．Singleconductorandbundledconductorswithidenticalicecoatingshapeexhibitdifferentgallopingstabilitycharacteristics．Itisalsofoundthatrotationalresponseoftheconductor
7、hasanimportantimpactontheexcitationandtheverticalresponsevalueofgalloping．Keywords：galloping；icedconductor；windtunneltest；aeroelasticmodelE-marl：louwj@zju．edu．en甚至導(dǎo)致倒塔斷線，或使整條線路跳閘停電，造成巨引目大的經(jīng)濟(jì)損失。覆冰導(dǎo)線舞動(dòng)早在l9世紀(jì)仞便成為電力線路設(shè)舞動(dòng)是由于輸電導(dǎo)線表面覆冰后氣動(dòng)參數(shù)改變，計(jì)所關(guān)心的問題，隨后學(xué)者們
