Damage analysis of wind turbine hub under random ultimate load

Abstract

Abstract: In view of the uncertainty and diversity of traditional wind turbine hubs load environment, the damage of wind turbine hubs under ultimate load was studied, then the structure was optimized. Specifically, the ultimate load is exerted to the turbine hub according to the blade coordinate system to obtain the strength of the hub under the ultimate working condition, the stress nephogram of hub was obtained and the strength of the hub under the ultimate working condition was solved. Then, for the variational law of the damage on the hub surface, the S-N curve and the Miner cumulative damage criterion were combined to correct the average stress of the equivalent stress of the hub. Finally, the topology structure of the hub was optimized, the optimized hub was remodeled and the static strength analysis was carried out.The results indicated that the optimizedhub mass was decreased by 9.2%,which met the strength requirements and provided a theoretical basis for subsequent hub structure optimization.

Key words: wheel hub, ultimate load, stress, damage

CLC Number:

TK83

ZHENG Yu-qiao, JIN Hong-hong, ZHAO Feng, LU Bing-xi, LI Hao, HE Zheng-wen. Damage analysis of wind turbine hub under random ultimate load[J]. Journal of Lanzhou University of Technology, 2022, 48(5): 65-69.

References

[1] MUYAN C,COKER D.Strength analysis of a 5-m composite wind turbine blade under static and fatigue loading conditions [J].IOP Conference Series:Materials Science and Engineering, 2020, 942(1):012045.
[2] LUHMANN B,SEYEDIN H,CHENG P W.Aero-structural dynamics of a flexible hub connection for load reduction on two-bladed wind turbines [J].Wind Energy,2017,20(3):521-535.
[3] RAVIKUMAR S,JASWANTHVENKATRAM V,SAI KUMAR Y J N V,et al.Design and analysis of wind turbine blade hub using aluminium alloy AA 6061-T6 [J].IOP Conference Series:Materials Science and Engineering,2017,197(1):012044.
[4] 刘雄辉,李德源,吕文阁,等.水平轴风力机轮毂强度和疲劳寿命分析方法研究 [J].太阳能学报,2012,33(5):763-768.
[5] HWANG B K,KIM T S.An investigation on ultimate strength of high strength aluminum alloys four-bolted connections with out-of-plane deformation [J].International Journal of Steel Structures,2019,19(4):1158-1170.
[6] 李有堂,王标.随机振动下镍钛形状记忆合金管接头的疲劳寿命分析 [J].兰州理工大学学报,2020,46(3):155-159.
[7] RADCHENKO A,KRIVOSHEINA M,KOBENKO S,et al.Modeling of orthotropic plate fracture under impact load using various strength criteria [J].AIP Conference Proceedings,2017,1800(1):040017.
[8] 陈棋,翁海平,吴晨.大型风电机组轮毂疲劳分析方法的研究 [J].太阳能学报,2015,36(9):2263-2268.
[9] 马进骁,李永贵,肖翅翔,等.水平轴风力机轮毂风荷载特性试验研究 [J].动力学与控制学报,2020,18(5):63-71.
[10] 马立鹏,杨生,孟春玲,等.兆瓦级风机变桨轴承与轮毂连接螺栓的疲劳分析 [J].机械强度,2020,42(1):208-215.
[11] KANG J,LIU H P,FU D Y.Fatigue life and strength analysis of a main shaft-to-hub bolted connection in a wind turbine [J].Energies,2019,12(1):1-14.
[12] XU P F,DUAN S Y,WANG F.Reverse modeling and topological optimization for lightweight design of automobile wheel hubs with hollow ribs [J].International Journal of Computational Methods,2019,17(9):1-12.
[13] 何玉林,刘桦,刘平,等.基于GL规范的大型风力发电机组轮毂强度数值分析 [J].机械科学与技术,2009,(4):522-526.
[14] WANG Q,LI R,ZHU Y F,et al.Integration design and parameter optimization for a novel in-wheel motor with dynamic vibration absorbers [J].Journal of the Brazilian Society of Mechanical Sciences and Engineering,2020,42(9):1-12.
[15] 卢磊,张礼达,徐志坚.基于ANSYS的1.5 MW水平轴风力机轮毂壁厚的优化与强度分析 [J].西华大学学报(自然科学版),2014,33(5):109-112.