基于拓扑优化的海上风电机组三脚架结构设计

To achieve the lightweight design of the offshore wind turbine（OWT）supporting structures，a topology optimization method for the OWT tripod structure is proposed. Firstly，the optimization problem with the minimum compliance subject to volume fraction is established. The concept design of the tripod structure is performed based on variable density method. Then based on topology optimization results，the tripod structure is reconstructed by deleting the horizontal connecting rod of the reference structure and increasing the thickness of inclined support and central main barrel. Finally，the reliability and effectiveness of the optimized structure are verified from three aspects including the natural frequency，ultimate strength and fatigue strength. The results show that compared with the reference structure，the optimized structure can greatly reduce the total weight of the whole structure while meeting the static，dynamic and fatigue design requirements，which fully proves the feasibility and superiority of the proposed topology optimization method.