CAJ | 학술논문

针对沿海风电场及风电结构数量快速增长、结构频遭台风破坏问题，采用不随高度变化的台风脉动风功率谱，基于线性滤波法与竖向相关性简化表达式模拟沿海某风电场台风风场模型，并通过功率谱密度函数验证其准确性。建立风电结构-桩基础耦合有限元模型，计算风电结构在上、下限台风风速条件下动力响应时程，分析极端风况下风电主体结构可能破坏模式。结果表明，塔筒屈服区域集中在塔筒底端约4m高度范围内，呈锥形分布。塔筒底端与基础预埋环连接处最不利。在上限台风风速条件下，塔顶水平位移超出容许值。两种风速条件下，最不利单桩轴力均未超出限值。该方法可为研究风电结构在极限风况下非线性倒塌奠定重要基础。
침대연해풍전장급풍전결구수량쾌속증장、결구빈조태풍파배문제，채용불수고도변화적태풍맥동풍공솔보，기우선성려파법여수향상관성간화표체식모의연해모풍전장태풍풍장모형，병통과공솔보밀도함수험증기준학성。건립풍전결구-장기출우합유한원모형，계산풍전결구재상、하한태풍풍속조건하동력향응시정，분석겁단풍황하풍전주체결구가능파배모식。결과표명，탑통굴복구역집중재탑통저단약4m고도범위내，정추형분포。탑통저단여기출예매배련접처최불리。재상한태풍풍속조건하，탑정수평위이초출용허치。량충풍속조건하，최불리단장축력균미초출한치。해방법가위연구풍전결구재겁한풍황하비선성도탑전정중요기출。
The coastal wind power farms and wind power structures are growing up rapidly and the coastal wind power structures are always damaged by typhoon.A typhoon fluctuating wind power spectrum which does not change with height,the linear filtering method and a simplified expression based on the vertical correlation were proposed to simulate the typhoon wind field over a coastal wind farm.The power spectral density function was adopted to verify the accuracy of the simulated wind field.A coupled finite element model of the wind power structure-pilefoundation was set up,and the dynamic responses of the wind power structure under the lower limit and upper limit speed of typhoon were calculated in order to analysis the possible failure modes of the main structure under extreme wind situation.The results show that the yield region mainly locates at the bottom of the tower drum about 4m high with a cone-shaped distribution.The joint between the tower drum bottom and the embedded ring is the most unfavorable position.The horizontal tower displacement exceeds the permissible value under the upper limit speed of typhoon,but the most unfavorable single pile axial force is not beyond the limit in either situation.This work lays an important foundation for the further research on nonlinear collapse of wind power structure under the extreme wind situation.