高強度柔性帶頸鍛造法蘭的應(yīng)用研究*
吳靜
- 摘 要
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吳靜（中國電力科學(xué)研究院， 北京 100055）［摘要］隨著輸電線路鋼管塔的大型化，針對高強鋼管及配套的高強帶頸法蘭的研究變得日益迫切?；谇捌趯?/span>Q345帶頸鍛造法蘭的理論分析及試驗研究成果，首次在國內(nèi)開展了Q420，Q460高強帶頸對焊法蘭節(jié)點軸拉承載力試驗研究，驗證了這兩種帶頸對焊法蘭和對接焊縫是可靠的，檢驗了Q420，Q460高強鋼柔性帶頸對焊法蘭應(yīng)用于輸電線路鋼管塔的可行性及安全性。通過試驗數(shù)據(jù)分析及有限元分析發(fā)現(xiàn)，大小管對接法蘭及鋼管的變形均主要集中在小管徑一側(cè)，因此建議小管徑一側(cè)法蘭設(shè)計應(yīng)予以加強。通過節(jié)點試驗及有限元分析還初步對比了柔性與剛性兩種設(shè)計思路的Q460高強帶頸對焊法蘭承載性能，并提出了工程應(yīng)用建議。［關(guān)鍵詞］鋼管塔； 法蘭； 高強度鋼材； 帶頸鍛造法蘭； 柔性設(shè)計； 剛性設(shè)計中圖分類號：TU392 文獻(xiàn)標(biāo)識碼：A 文章編號：1002-848X(2013)08-0036-04Application study on high strength flexible high-neck forging flangesWu Jing(China Electric Power Research Institute, Beijing 100055, China)Abstract: With the development of steel tube transmission towers, study on high strength steel tube and matched high strength high-neck forging flange is exigently needed. Based on the theoretical and experimental researches about high-neck forging flanges of Q345, axial tension tests about high strength high-neck butt welding forging flanges of Q420 and Q460 were carried out for the first time in China. The reliability of the performance of flanges and butt welding lines is proved. Feasibility and security of high strength high-neck butt welding forging flanges used in steel tube transmission towers are testified. As to flanges which connect different diameter steel tubes, it was found by joint test and finite element analysis that distortion of flange and tubes mainly appeared on the side of small diameter tube. It is suggested that the design of butt welding flanges on the side of small diameter tube should be strengthened. Bearing capacities of Q460 high strength high-neck butt welding forging flanges designed flexible or rigid were compared primarily, and engineering suggestions are proposed.Keywords: steel tube tower; flange; high strength steel; high-neck forging flange; flexible design; rigid design*國家電網(wǎng)公司科技項目（GC7109006）。參考文獻(xiàn)［1］劉振亞.特高壓電網(wǎng)［M］.北京：中國電力出版社，2005.［2］送電用鋼管鉄塔製作基凖［S］. 東京：日本鉄塔恊會，平成7年3月.［3］GB/T 91151—2000 平面、突面對焊鋼制管法蘭［S］. 北京：中國標(biāo)準(zhǔn)出版社，2005.［4］DL/T 5154—2002 架空送電線路桿塔結(jié)構(gòu)設(shè)計技術(shù)規(guī)定［S］. 北京：中國電力出版社，2002.［5］1000kV交流特高壓同塔雙回線路桿塔結(jié)構(gòu)研究［R］. 北京：中國電力科學(xué)研究院，2008.［6］特高壓鋼管塔高頸法蘭和偏心節(jié)點優(yōu)化設(shè)計研究［R］. 北京：中國電力科學(xué)研究院，2009.
