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

SU Fengyu, QI Tao, DONG Shuyan, CHAO Guanliang, HE Haijian, YANG Yang

（XJ Group Wind Power Technology Company, Xuchang 461000, China）

Abstract: 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.

Key words: wind turbine; transport frame; weld; strength assessment