大型风电叶片根部连接螺栓静强度设计

The Static Strength Design of Root Connection Bolts for Large Scale Wind Blades

风电叶片与主机的连接强度直接影响着风力发电机组运行的安全性和可靠性,风电叶片根部连接螺栓静强度设计是连接设计的基础,静强度设计是连接螺栓在叶片受到最大载荷情况不发生断裂失效和获得可靠连接的保证,同时也为合理设计螺栓安装预紧力,保证叶根螺栓正确安装提供依据。本文针对大型风电叶片根部连接的特点,结合螺栓设计标准,分析了极限工况下叶根连接的受力情况,并依据受力情况阐述了一种叶根螺栓静强度校核方法,为风电叶片根部螺栓强度设计提供了一种参考思路。

The connection strength of wind blade and wind turbine has great effect on the safety and reliability of wind turbine operation, the static strength design of root connection bolts for large scale wind blade is the basic of connection strength design. The static strength design ensures that the connection bolts do not fracture failure and get a reliable connec- tion while the blade under maximum load, meanwhile, it provides a basis for bolts pretension design and the correct installation of root connection bolts. Based on the characteristic of large-scale wind blade root connection, this thesis analyzes the forces of root connection of wind blade in the limit condition, and describes a design of the blade bolts static strength, which would be a reference for wind blade root bolt strength design.