CAJ | 학술논문

结构轻便、高柔度的特高压拉线塔能否满足抗风设计，是输电工程技术人员关心的热点问题。建立了特高压单柱拉线塔塔线体系的非线性有限元模型，采用线性滤波法模拟塔线体系的风荷载时程，通过Newmark法对拉线塔塔线体系的风振响应进行时程分析。分析结果表明：在90o大风工况下，主柱顺风向绕底端的刚体转动是引起主柱节点顺风向位移的主要因素；拉线塔产生了顺风向的刚体摆振和弯曲振动，并且产生了绕主柱轴线的扭转共振；由于拉线塔的扭振，挂线点以上的主柱发生了扭转变形，其斜材的轴力值较大；风振响应的顺风向节点位移、主材轴力最大值、斜材轴力最大值，均大于静态等效风荷载作用下的相应值。
결구경편、고유도적특고압랍선탑능부만족항풍설계，시수전공정기술인원관심적열점문제。건립료특고압단주랍선탑탑선체계적비선성유한원모형，채용선성려파법모의탑선체계적풍하재시정，통과Newmark법대랍선탑탑선체계적풍진향응진행시정분석。분석결과표명：재90o대풍공황하，주주순풍향요저단적강체전동시인기주주절점순풍향위이적주요인소；랍선탑산생료순풍향적강체파진화만곡진동，병차산생료요주주축선적뉴전공진；유우랍선탑적뉴진，괘선점이상적주주발생료뉴전변형，기사재적축력치교대；풍진향응적순풍향절점위이、주재축력최대치、사재축력최대치，균대우정태등효풍하재작용하적상응치。
ABSTRACT:The UHV guyed tower is typical structure of tall and slender, if it can be satisfy the wind resistance design became a hotspot around the engineers who engaged in transmission line engineering. The nonlinear finite element model of UHV guyed single-mast transmission tower-line system was built. The wind load time history about the transmission tower-line system was simulated by the linear filtering method. Wind-induced response of the transmission tower-line system was analyzed by Newmark method. Result shows:Under the condition of high wind, whose angle is 90o, the mast’s downwind rigid body rotation around bottom is the major factor caused downwind displacements of the mast’s nodes. Guyed tower produced downwind rigid body swing and bending vibration, and also produced torsional resonance around the axis of the mast. Because of guyed tower’s torsional vibration, the mast which above the guy hang point produced torsional deformation, the diagonal member’s axial force in that position is also large. Wind-induced response of displacements of nodes, the max values of leg members and diagonal members are all larger than corresponding values under static equivalent wind loads.