风机基础管节点在轴向力、面内弯矩和面外弯矩作用下的应力集中系数（Stress Concentration Factor, SCF）较高，往往导致多桩基础海上风机结构的疲劳极限状态成为其临界设计状态，需开展针对性研究工作。针对这一问题提出一种设置加强环和在平行于弦管轴向方向额外设置加强板的方法来控制其SCF的方法。通过有限元模拟软件ANSYS对3平面Y型管节点进行应力集中问题分析，分析结果表明几种加强构件的方法均能减小其SCF，该方法具有工程实用价值。
The Stress Concentration Factor (SCF) of the tubular joints of wind turbine foundation under the action of axial force, in-plane bending moment and out of plane bending moment is high, which often leads to the fatigue limit state of multi-pile foundation offshore wind turbine structure becoming its critical design state. Therefore, it is necessary to carry out further research on this problem. To address this issue, a method of setting stiffener ring and extra stiffening plate parallel to the chord axial direction is adopted to control SCF. This method has the characteristics of simple design and easy construction. The finite element simulation software ANSYS is used to analyze the three-plane Y-shaped tubular joints. The results show that several methods of stiffening member can reduce SCF and the method has practical value in engineering.