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（1 同濟(jì)大學(xué)建筑設(shè)計(jì)研究院（集團(tuán)）有限公司， 上海 200092； 2 同濟(jì)大學(xué)建筑工程系，上海 200092）

［摘要］為解決我國風(fēng)資源分布和市場電力需求之間的矛盾，風(fēng)場布局將由三北地區(qū)向中東部低風(fēng)速區(qū)轉(zhuǎn)移。構(gòu)架式預(yù)應(yīng)力抗疲勞鋼管風(fēng)力發(fā)電塔是一種新型的組合式風(fēng)塔，不僅具有用鋼量省、施工方便等優(yōu)點(diǎn)，還可通過在塔柱內(nèi)布置預(yù)應(yīng)力鋼絞線有效提高風(fēng)塔疲勞壽命。過渡段作為連接上部塔筒和下部塔架的轉(zhuǎn)換結(jié)構(gòu)，其結(jié)構(gòu)性能對整塔的正常工作極其重要。介紹了某2-5MW輪轂高度為140m的四邊形格構(gòu)式預(yù)應(yīng)力抗疲勞風(fēng)力發(fā)電塔的過渡段結(jié)構(gòu)設(shè)計(jì)，基于ABAQUS軟件對過渡段進(jìn)行極限承載力、抗疲勞性能和穩(wěn)定性能的分析。分析結(jié)果表明，極限荷載工況下過渡段基本處于彈性階段；過渡段厚度由45°方向的疲勞荷載工況控制，最大熱點(diǎn)應(yīng)力出現(xiàn)在過渡段斜錐面下部對接焊縫處；過渡段的穩(wěn)定安全系數(shù)在3-0以上，滿足設(shè)計(jì)要求。

［關(guān)鍵詞］風(fēng)力發(fā)電塔； 組合式風(fēng)塔； 過渡段； 極限承載力； 抗疲勞性能； 穩(wěn)定性能

中圖分類號：TU347文獻(xiàn)標(biāo)識碼：A文章編號：1002-848X(2019)14-0023-06

Structural design of transition piece of 140m-high quadrilateral lattice prestressed anti-fatigue wind turbine tower

Liang Feng1, Tao Duo2

(1 Tongji Architectural Design (Group) Co., Ltd., Shanghai 200092, China;2 Department of Building Engineering, Tongji University, Shanghai 200092, China)

Abstract:In order to solve the contradiction between the distribution of wind resources and the demand of market electricity, the distribution of wind field will be transferred from the north areas to the low wind speed areas in the middle and east of China. Lattice anti-fatigue prestressed steel pipe wind turbine tower is a new type of composite wind tower. It not only has the advantages of low steel consumption and convenient construction, but also can effectively improve the fatigue life of the wind tower by arranging prestressed steel strands in the tower column. Transition piece is a transfer structure connecting the upper tower barrel and the lower tower frame. Its structural performance is very important to the normal work of the whole tower. The structural design of transition piece of a quadrilateral lattice prestressed wind turbine tower with a height of 140m was introduced. The ultimate bearing capacity, anti-fatigue behavior and stability of the transition piece were analyzed based on ABAQUS software. The analysis results show that the transition piece is basically in the elastic stage under the ultimate load condition; the thickness of the transition piece is controlled by the fatigue load condition in the direction of 45 degrees, and the maximum hot spot stress occurs at the butt weld of the lower inclined cone of the transition piece; the stability safety factor of the transition section is above 3-0, which meets the design requirements.

Keywords:wind turbine tower; composite wind tower; transition piece; ultimate bearing capacity; anti-fatigue behavior; stability performance