RESEARCH ON BEARING CAPACITY OF WIND TURBINE TOWER CONSIDERING COLD BENDING AND WELDING IMPERFECTIONS

Chen Junling; Wan Zhaocong; Feng Youquan; Qiu Xu

doi:10.19912/j.0254-0096.tynxb.2024-0531

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Acta Energiae Solaris Sinica ›› 2025, Vol. 46 ›› Issue (8) : 39-46. DOI: 10.19912/j.0254-0096.tynxb.2024-0531

RESEARCH ON BEARING CAPACITY OF WIND TURBINE TOWER CONSIDERING COLD BENDING AND WELDING IMPERFECTIONS

Chen Junling¹, Wan Zhaocong¹, Feng Youquan², Qiu Xu³

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Abstract

The cold bending and welding imperfections in the finite element models are generated through setting the thermal expansion coefficient of steel and applying temperature field. The influence of length-radius ratio, radius-thickness ratio, spacing of circumferential welds, amplitude of welding depression and residual stresses on the bearing capacity of the tower are investigated. The numerical results show that the influence of cold bending and welding residual stresses on the load bearing capacity of the tower is non-negligible. When the welding depression is relatively large, the finite element results may be lower than the bearing capacity characteristic values calculated by the engineering algorithm given in Eurocode 3, which means that the engineering algorithm is not conservative.

Key words

wind turbines / towers / defects / buckling / bearing capacity

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Chen Junling, Wan Zhaocong, Feng Youquan, Qiu Xu. RESEARCH ON BEARING CAPACITY OF WIND TURBINE TOWER CONSIDERING COLD BENDING AND WELDING IMPERFECTIONS[J]. Acta Energiae Solaris Sinica. 2025, 46(8): 39-46 https://doi.org/10.19912/j.0254-0096.tynxb.2024-0531

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