不同结构形式对风电机组塔架轻量化设计的影响研究

Influence of different structural forms on the lightweight of wind turbine tower

针对全球风力发电市场对风电项目投资成本控制,尤其是对塔架投资成本控制的迫切需求的问题,对不同结构形式塔架模型的固有频率、受载状态、强度性能、屈曲稳定性以及疲劳损伤等方面进行了对比计算与研究。对风力发电机组塔架轻量化设计受其本体不同结构形式的影响程度进行了归纳,提出了一种基于塔架设计原则的相关计算理论,构建了若干款不同结构形式的塔架模型;并在同一控制策略、同一风况条件下,利用BLADED仿真软件、工程算法进行了载荷求解计算和结果对比。研究结果表明:在塔架结构尺寸设计允许的情况下,塔架底部直径越大或靠近塔架底部的塔节直段数量越多,越有利于塔架的本体刚度、抗极限性能和抗疲劳性能的提高,也就越有利于塔架的轻量化设计。

Aiming at the urgent demand of global wind power market for project investment cost control, especially for tower investment cost control, contrast calculation of the natural frequency, loading state, strength performance, buckling stability and fatigue damage of different tower models were made. The influence of different structure forms on the lightweight design of wind turbine tower was summarized. Based on the relevant calculation theories of tower design principles, a number of tower models with different structure forms were built, and BLADED simulation software and engineering algorithm were used to solve the load calculation and compare the results under the same control strategy and wind conditions. The results indicate that based on allowance of the size design of the tower structure, the larger the diameter at the bottom of the tower or the more the number of straight sections near the bottom of the tower, the more beneficial to the improvement of the stiffness, the anti-limit performance and the anti-fatigue performance of the tower, and the more beneficial to the lightweight design of the tower.