组合式风力发电塔架静力学有限元分析

为解决常规的锥型风力发电塔筒在大型风电机组中的制作、加工和施工运输成本大幅上升的问题,提出了新型组合式风力发电塔架结构以及在组合式塔架连接处采用过渡段连接的改进方案。分析了组合式塔架的静力学特点和最佳过渡段设计方案,并与常规锥台型塔筒的力学性能进行了对比。结果表明,组合式塔架在额定工况和暴风工况下均满足强度和刚度要求;过渡段最佳厚度为255mm、高度为25m,改进后的塔架提高了组合式塔架的力学性能;暴风工况下,改进后的组合式塔架塔顶位移比锥台型塔筒约小17%,且总体上组合式塔架的用钢量明显小于锥台型塔筒,具有良好的经济适用性能。

Finite Element Analysis of Static Performance for Combined Wind Turbine

The production, processing and construction transportation costs in large wind turbines of conventional cone wind power tower have risen sharply. In order to solve the problem, a new combined wind power tower structure and an improvement scheme that uses transition section connection in the junction of combined tower frame are put forward. The static characteristics of the combined tower frame and optimal transition section design of the scheme are analyzed and compared with the mechanical properties of the conventional cone tower cylinder. The results show that the combined tower frame can meet the requirements of strength and stiffness under the rated condition and the storm condition. The optimal thickness of the transition section is 255 mm and the height is 25 m. The improved tower frame raises the mechanical properties of the combined tower. Under the storm condition, the tower top displacement of the improved combined tower is about 17% smaller than that of the cone one, and the overall amount of steel used of the combined tower are much smaller than the cone one, which has the good economic performance.