期刊论文

中文

兵器材料科学与工程

1004-244X

2023

46

2

117-122

10.14024/j.cnki.1004-244x.20230313.002

CX20210801:湖南省研究生科研创新项目 HJLFD-QTHT-2020-08:国家能源集团科技创新项目

本校为第一机构

风力机叶根高强螺栓疲劳断裂失效是影响风力机安全运行的重要因素，而高强螺栓的断裂与螺栓材料和所受载荷关联。以2 MW风力机叶根高强连接螺栓为研究对象，用Abaqus软件有限元仿真，研究42CrMoA螺栓材料的疲劳断裂特征。结果表明：疲劳载荷影响下，叶根螺栓应力沿周向对称分布，600 MPa时螺栓断裂位置位于叶根相接触的螺杆部位。裂纹萌生于光滑试样表面，螺栓疲劳断裂是由于多源裂纹交汇而形成峰线所致。在扭矩作用下，螺栓断裂位置位于轴承相接触的螺杆部位，随平均扭矩从1.2倍增至1.4倍，螺栓损伤寿命由2.49×106周次降至1 406周次，且断裂特征由NF+LS-LS顺序转变。本研究对揭示风力机叶根高...

The fatigue fracture failure of high-strength bolts at the blade root of wind turbine is an important factor affecting the safe operation of wind turbine,and the fracture of high-strength bolts is essentially related to bolt material and load. The research object was a ...MORE The fatigue fracture failure of high-strength bolts at the blade root of wind turbine is an important factor affecting the safe operation of wind turbine,and the fracture of high-strength bolts is essentially related to bolt material and load. The research object was a 2 ...