大型水平轴风力机塔筒螺栓疲劳强度分析.PDFVIP

Altair2014 技术大会论文集 大型水平轴风力机塔筒螺栓疲劳强度分析 Analysis on the Bolt Fatigue Strength of Turbine Tower OF HAWTs 1 1 1 2 1 潘红，梅亮 ，章迪 ，贾娇 ，龙凯 (1. 华北电力大学可再生能源学院，北京，102206) （2.北京，100176） 摘要：为了实现某大型水平轴风力机塔筒底部螺栓的抗疲劳设计，提出了基于Schmidt-Neuper 模 型的疲劳强度校核方法。基于HyperMesh 软件建立了塔筒底部螺栓和法兰联接有限元模型。基于工 程算法，分析计算得到塔筒底部整圈螺栓疲劳累积损伤分布，并进一步找到了最大累计损伤位置。 同样，基于有限元模型也得到上述的螺栓疲劳累计损伤情况并与工程算法进行比较。本文提出的方 法在大型水平轴风力机塔筒底部螺栓设计上具有可行性和有效性。 关键词：风力机塔筒 法兰 螺栓 工程算法 FEA; HyperMesh Abstract ：In order to realize the resistance to fatigue strength design for tower bolts of the large-scale horizontal axis wind turbines(HAWTs), the strength check method based on Schmidt-Neuper model was presented. The FE model of the bolts connecting flanges was established based on HyperMesh. Based on engineering method, the distribution of the cumulative damage of bolts on the whole ring was calculated based on rain flow counting and accumulated damage calculation. Furthermore the position of the maximum fatigue cumulative damage was found. And, based on the FE model, the cumulative damage of bolts being similar to engineering method was calculated and compared with those by engineering method. The results showed that the method and procedure presented in the paper was feasible and effective in the fatigue strength analysis for tower bolts. Key words: wind turbine tower, flange, bolt, engineering method, FEA, HyperMesh 引言 螺栓联接是风力机零部件中最常见的联接形式。随着近几年来风力机向着大型化发展，其工作环境更 [1] 加恶劣，设计要求更加严苛，联接螺栓疲劳破坏或断裂现象时有发