STUDY ON FATIGUE PROPERTIES OF DOUBLE-PLATE THROUGH-CORE BOLTED JOINTS IN WIND TURBINE TOWERS

Guo Hongchao; Gao Xiang; Zhang Sijia; Liang Gang; Liu Yunhe

doi:10.19912/j.0254-0096.tynxb.2022-0756

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Acta Energiae Solaris Sinica ›› 2023, Vol. 44 ›› Issue (9) : 377-383. DOI: 10.19912/j.0254-0096.tynxb.2022-0756

STUDY ON FATIGUE PROPERTIES OF DOUBLE-PLATE THROUGH-CORE BOLTED JOINTS IN WIND TURBINE TOWERS

Guo Hongchao^1,2, Gao Xiang^1,2, Zhang Sijia^2,3, Liang Gang², Liu Yunhe⁴

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Abstract

A rectangular concrete-filled steel tubular bundle wind turbine tower structure is proposed. High-cycle fatigue tests and finite element analysis were carried out on the double-plate through-core bolt connection joint of this tower. The fatigue failure mode and fatigue life of the joint were obtained. The results show that the fatigue failure mode of this double-plate through-core bolt connection joint is shear failure of the high-strength bolts. The damage is concentrated at the junction with the steel plate. Fatigue cracks in the bolts at the steel-concrete joint face and at the nut. The core-piercing bolt fractures in three parts under shear fatigue. Finite element analysis shows that the specification of bolts has obvious effects on the fatigue properties of specimens. If the bolt diameter is increased, the fatigue life of joints will be increased but the fatigue limit will be reduced. The thickness of the plate has no significant effect on fatigue properties.

Key words

wind turbine towers / bolted joints / fatigue testing / rectangular concrete filled steel tube bundle / FEA

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Guo Hongchao, Gao Xiang, Zhang Sijia, Liang Gang, Liu Yunhe. STUDY ON FATIGUE PROPERTIES OF DOUBLE-PLATE THROUGH-CORE BOLTED JOINTS IN WIND TURBINE TOWERS[J]. Acta Energiae Solaris Sinica. 2023, 44(9): 377-383 https://doi.org/10.19912/j.0254-0096.tynxb.2022-0756

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