Abstract: In addressing the stability concerns associated with the disassembly process of wind turbine tower structures, the finite element numerical analysis method is used to analyze the static force characteristics of the tower when lifting, considering the factors of the hook position and the number of lifting lugs, so as to find a reasonable configuration scheme for tower dismantling. Firstly, focusing on the 2MW wind turbine tower, the tower dismantling scheme process is elaborately discussed. Subsequently, the finite element model of the heaviest section of the tower (the first segment) is constructed, and the finite element numerical analysis method is applied to compare and analyze the deformation-resisting ability and stress response characteristics of the first section of the tower structure with different hook positions and the number of lugs. The results show that compared with the use of two lugs for lifting, the deformation response of the tower can be greatly reduced by using 3 and 4 lugs, with maximum reduction rates of 81% and 87.3%, respectively. In addition, when the ratio of the hook distance from the tower top axis to the height of the first section of the tower is greater than 0.6, using three lugs contributes more to reducing the overall deformation of the first tower segment compared to using four lugs. At the same time, the equivalent stress of the first section of the tower with three lugs is smaller than that with two and four lugs throughout the disassembly process, with the smallest variation in equivalent stress amplitude observed. This shows that the first section of the tower is most stable when using three lugs, and the results of the study can provide a solid scientific basis for the requirements of the relevant standards or technical specifications.

Key words: tower, disassemble, statics, finite element analysis