风电机组叶根结构对叶根螺柱极限与疲劳强度影响研究

陈中亚; 何先照; 罗勇水; 吕旭峰; 陆时捷; 周孟玉

doi:10.19912/j.0254-0096.tynxb.2024-2426

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风电机组叶根结构对叶根螺柱极限与疲劳强度影响研究

更新时间：2026-07-21

- 风电机组叶根结构对叶根螺柱极限与疲劳强度影响研究
- Vol. 47, Issue 5, Pages: 307-313(2026)
- 作者机构：
- 作者简介：
- 基金信息：
- DOI：10.19912/j.0254-0096.tynxb.2024-2426
  CLC： TH114
- Online First：04 June 2026，
  
  Published：2026
- 稿件说明：
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陈中亚, 何先照, 罗勇水, et al. 风电机组叶根结构对叶根螺柱极限与疲劳强度影响研究[J]. 2026, 47(5): 307-313.
DOI：

陈中亚, 何先照, 罗勇水, et al. 风电机组叶根结构对叶根螺柱极限与疲劳强度影响研究[J]. 2026, 47(5): 307-313. DOI： 10.19912/j.0254-0096.tynxb.2024-2426.

摘要

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.

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references

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