基于ANSYS的MW级风电机组运输支架强度计算

Strength assessment of transport frame of MW wind turbine based on ANSYS

针对某2 MW风电机组运输支架的强度安全问题,对运输支架的板和焊缝进行了运输和试验台试验2种工况下的强度计算研究。以ANSYS为平台建立了包含风电机组和运输支架的完整有限元模型,基于APDL语言和GL规范定义了运输和试验台试验2种工况,首先通过排除焊趾奇点应力的方法得到了运输支架板的极限安全系数;之后利用国际焊接协会规范对运输支架的焊趾应力进行了插值计算,得到了焊缝的极限安全系数。研究结果表明,运输支架的板和焊缝强度安全系数均大于1,满足设计使用要求,该方法可为运输支架的结构设计和优化提供了一种实用的手段。

Aiming at the ultimate strength safety of the transport frame of 2 MW wind turbine,a strength assessment of plates and welds of the transport frame under transporting and testing load case was studied. The complete FE model including wind turbine was built by the ANSYS software. Transporting and testing load cases were defined based on the APDL command and GL specification. Firstly,the ultimate safety factor of plates were calculated by excluding the weld spots results. Secondly,the weld spots safety factors were calculated by the weld hot spots stresses which were obtained according to the extrapolation method of IIW. The results indicate that the safety factors of plates and welds are above 1 and have sufficient strength to fulfill the design requirement and the method in this study is feasible and effective for the design and optimization of transport frame.