MECHANICAL PERFORMANCE STUDY OF NEW SPLIT CONCRETE-FILLED STEEL TUBULAR WIND TURBINE TOWER

Liao Mingjin; Xu Yu; Fan Kezheng

doi:10.19912/j.0254-0096.tynxb.2024-0492

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Acta Energiae Solaris Sinica ›› 2025, Vol. 46 ›› Issue (8) : 18-24. DOI: 10.19912/j.0254-0096.tynxb.2024-0492

MECHANICAL PERFORMANCE STUDY OF NEW SPLIT CONCRETE-FILLED STEEL TUBULAR WIND TURBINE TOWER

Liao Mingjin, Xu Yu, Fan Kezheng

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Abstract

A new split concrete-filled steel tubular wind turbine tower was proposed. Firstly, based on the principle that the cross-sectional load capacity at the same position was not less than that of the conical tower, the basic design parameters of the split wind turbine tower structure was proposed. Subsequently, a comparative study of the mechanical performance differences between the split wind turbine tower and the conical tower was conducted based on ABAQUS. The research findings indicate that： 1） Compared to the conical tower, under the same design load, the split wind turbine tower exhibits a decrease of 19.58% in maximum Mises stress, a decrease of 24.93% in tower top displacement, an increase of 11.7% in fundamental frequency, a 33.0% increase in linear buckling load, a 41.5% increase in nonlinear buckling load, and a 4.7% decrease in steel consumption. 2） When the imperfect amplitude coefficient is 0.05, the instability load of the split wind turbine tower is approximately twice that of the conical tower. 3） The split wind turbine tower exhibits a gradual stability decline instead of sudden instability and destruction. This design effectively mitigates the instability issue arising from an increasing ratio of diameter to thickness compared to the conical tower. In contrast to the conical tower, its structural load capacity is less affected by imperfection amplitude, rendering it insensitive to imperfection. Moreover, the plasticity zone of the section is restricted due to the constraint imposed by the concrete-filled steel tubular, resulting in excellent buckling performance and structural ductility characteristic.

Key words

wind turbine tower / concrete-filled steel tubular / static analysis / modal analysis / buckling / imperfection insensitivity

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Liao Mingjin, Xu Yu, Fan Kezheng. MECHANICAL PERFORMANCE STUDY OF NEW SPLIT CONCRETE-FILLED STEEL TUBULAR WIND TURBINE TOWER[J]. Acta Energiae Solaris Sinica. 2025, 46(8): 18-24 https://doi.org/10.19912/j.0254-0096.tynxb.2024-0492

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