风电机组大型化进程加速,叶片尺寸增大致使叶根螺柱承受更为复杂严苛的载荷。创新探究叶根螺柱极限应力与疲劳强度,对保障风电机组安全运行意义重大。提出一种带圆角变径实体和梁单元柔性耦合的叶根螺柱建模方法,研究给定叶根螺柱设计预紧力下,某机组叶根螺柱变径圆角、联接圆盘厚度、螺栓套沉孔深度和细杆直径对螺柱极限和疲劳强度的影响。所提出的建模方式相较于传统仅用等截面梁单元建模的方式,能精确模拟变径圆角,更精准地反映实际结构力学特性;相较实体螺柱建模,可显著降低网格量,提高计算效率。本研究为风电机组叶根螺柱连接结构设计优化提供了重要理论支持和技术指导。
Abstract
With the accelerating process of large-scale wind turbines, the increase in blade size makes the root studs of wind turbine blades subject to more complex and severe loads. Innovatively exploring the ultimate stress and fatigue strength of root studs is of great significance for ensuring the safe operation of wind turbines. This study proposes a flexible coupling modeling method for root studs of wind turbine blades, which combines a filleted variable-diameter solid and beam elements. Under the given pre-tightening force of the root stud design, the effects of the fillet radius of the variable-diameter section of the root stud, the thickness of the connecting disc, the depth of the counterbore of the bolt sleeve, and the diameter of the thin rod on the ultimate and fatigue strength of the root stud of a certain wind turbine unit are studied. However, it can be improved by increasing the yield utilization rate, and there is an optimal solution for its design. Compared with the traditional modeling method using only equal-cross-section beam elements, the modeling method proposed in this study can accurately simulate the fillet of the variable-diameter section and more precisely reflect the mechanical characteristics of the actual structure. Compared with solid stud modeling, it can significantly reduce the mesh quantity and improve the calculation efficiency. This study provides important theoretical support and technical guidance for the design optimization of the connection structure of root studs of wind turbine blades.
关键词
风电机组 /
叶根螺栓 /
有限元分析 /
极限应力 /
疲劳强度
Key words
wind turbines /
bolts of blade root /
finite element analysis /
ultimate stress /
fatigue strength
{{custom_sec.title}}
{{custom_sec.title}}
{{custom_sec.content}}
参考文献
[1] VERMA A S, JIANG Z Y, VEDVIK N P, et al.Impact assessment of a wind turbine blade root during an offshore mating process[J]. Engineering structures, 2019, 180: 205-222.
[2] YUN F, LIU J, LIU C Y, et al.Analysis and research on the cause of wind turbine blade bolt fracture[J]. Journal of physics: conference series, 2021, 2133(1): 012028.
[3] LI Z P, YANG S Y, ZHANG F, et al.Analysis of load characteristics of wind turbine blade root bolts under loosened and fractured conditions[J]. Journal of mechanical science and technology, 2024, 38(4): 1731-1741.
[4] 龚民. 风电叶片根部螺栓连接的受力性能研究[D]. 武汉: 武汉理工大学, 2020.
GONG M.Research on the mechanical properties of the bolts connection at the root of wind turbine blades[D]. Wuhan: Wuhan University of Technology, 2020.
[5] 张轶东, 张恩享, 王有超, 等. 海上风电机组叶片螺栓断裂原因分析[J]. 船舶工程, 2023, 45(S1): 37-41.
ZHANG Y D, ZHANG E X, WANG Y C, et al.Analysis on the cause of blade bolt fracture of offshore wind turbine[J]. Ship engineering, 2023, 45(S1): 37-41.
[6] 应华冬, 刘宏伟, 陈中亚, 等. 大型风力机桨叶螺栓断裂失效分析及优化研究[J]. 机电工程, 2021, 38(2): 216-221.
YING H D, LIU H W, CHEN Z Y, et al.Fracture failure analysis and optimization of blade bolts in large wind turbine[J]. Mechanical & electrical engineering magazine, 2021, 38(2): 216-221.
[7] 王振刚, 唐雪, 蒋传鸿, 等. 大型风电叶片预埋叶根连接参数化建模及强度分析[J]. 复合材料科学与工程, 2022(10): 20-24, 37.
WANG Z G, TANG X, JIANG C H, et al.Parametric modeling and strength analysis of large-size wind turbine blades embedded root connection[J]. Composites science and engineering, 2022(10): 20-24, 37.
[8] 白会超, 苏少昌, 张文伟, 等. 典型参数对风电叶片预埋型叶根连接螺栓承载性能的影响[J]. 玻璃钢/复合材料, 2019(9): 38-43.
BAI H C, SU S C, ZHANG W W, et al.Influence on bolts of wind turbine blade root bushing connection by connection parameters[J]. Fiber reinforced plastics/composites, 2019(9): 38-43.
[9] 喻光安, 秦志文, 荣晓敏, 等. 缺陷对风电叶片螺栓连接性能影响研究[J]. 太阳能学报, 2019, 40(11): 3244-3249.
YU G A, QIN Z W, RONG X M, et al.Effects of defects on connection performance for wind turbine blades[J]. Acta energiae solaris sinica, 2019, 40(11): 3244-3249.
[10] 黄雪梅, 陶黎明, 姚锦恺, 等. 风电叶片螺栓套疲劳试验机跟随控制策略研究[J]. 太阳能学报, 2017, 38(8): 2106-2111.
HUANG X M, TAO L M, YAO J K, et al.Study of tracking control strategy of fatigue testing machine for bolt sleeve of wind turbine blade[J]. Acta energiae solaris sinica, 2017, 38(8): 2106-2111.
[11] 罗胜曦, 谢东洋, 解轲, 等. 风机12.9级叶根螺栓极限及疲劳承载影响因素分析[J]. 华中科技大学学报(自然科学版), 2025, 53(1): 86-91, 106.
LUO S X, XIE D Y, XIE K, et al.Analysis of factors influencing ultimate and fatigue capacity of grade 12.9 root bolts for wind turbine blades[J]. Journal of Huazhong University of Science and Technology (nature science edition), 2025, 53(1): 86-91, 106.
[12] ZHENG T S, CHEN N Z, YUAN L.Structural strength assessment for thin-walled blade root joint of floating offshore wind turbine (FOWT)[J]. Thin-walled structures, 2023, 191: 111057.
[13] ZHENG T S, CHEN N Z.Time-domain fatigue assessment for blade root bolts of floating offshore wind turbine (FOWT)[J]. Ocean engineering, 2022, 262: 112201.
[14] 龙凯, 丁文杰, 陈卓, 等. 塔筒法兰间隙对螺栓疲劳损伤的影响分析[J]. 太阳能学报, 2021, 42(12): 206-211.
LONG K, DING W J, CHEN Z, et al.Effects analysis of flange gap on bolt fatigue damage for wind turbine tower[J]. Acta energiae solaris sinica, 2021, 42(12): 206-211.
[15] 吉亮, 龙凯, 谷春璐, 等. 塔筒法兰翘曲对螺栓疲劳的影响[J]. 太阳能学报, 2021, 42(10): 202-207.
JI L, LONG K, GU C L, et al.Effects of tower flange warping on bolt fatigue[J]. Acta energiae solaris sinica, 2021, 42(10): 202-207.
[16] 言婷, 周海波, 邓航. 风电叶片预埋型叶根连接螺栓抗疲劳优化设计研究[J]. 复合材料科学与工程, 2021(1): 102-106.
YAN T, ZHOU H B, DENG H.Research on fatigue strength optimization of bushing connection bolts for wind power blades[J]. Composites science and engineering, 2021(1): 102-106.
[17] Germanischer Lloyd.Guideline for the certification of wind turbines edition 2010[S]. Hamburg: GL renewables certification, 2010.
[18] ISO/TS 16281:2008, Rolling bearings—methods for calculating the modified reference rating life for universally loaded bearings[S]. Geneva: International Organization for Standardization, 2008.
基金
中央引导地方科技发展资金项目（2025ZY01009）
PDF(2024 KB)
