风机塔筒焊缝的疲劳应力计算方法对比研究

Comparative Study on Fatigue Stress Calculating Method for Weld of Fan Tower Tube

塔筒是风力发电机组的主要承重部分,在机组自重等多种载荷共同作用下,塔筒焊缝处会产生较大应力集中,易引起疲劳破坏。通过工程计算方法、有限元实体单元和壳单元模型对塔筒焊缝进行疲劳应力分析;然后根据计算结果,对塔筒焊缝处疲劳应力计算方法进行对比研究。

The tower tube is the main load-bearing part of the wind turbine. Under the combined action of various loads such as the unit’s own weight, the tower tube weld will have a large stress concentration, which is easy to cause fatigue damage. The fatigue stress analysis of the tower weld is carried out by engineering calculation method, finite element solid element and shell element model. Then, according to the calculation results, the calculation method of fatigue stress at the tower weld is compared.