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Steel–Concrete Hybrid Tower (SCHT) has become the mainstream structures for supporting onshore wind turbines with hub heights above 120 m. However, the increased self-weight of the concrete section leads to a significant increase in the base moment under seismic loads, and the contribution rate of higher modes can reach up to 57% (the first mode of a 160 m tower only accounts for 22%–43%). To address this multi-modal amplification, this paper integrates two innovative studies: 1) Tuned Mass Damper Inerter (TMDI): By amplifying the mass effect with an inertial mass element (β), a single device can suppress multi-modal vibrations; 2) Tuned Mass Dampers (TMDs): Multiple damper parameters are optimized in groups to control each mode specifically. The study shows that TMDI can significantly reduce the base moment of the structure through the combination of small mass and large inertial mass (β ≥ 3μ), and the reduction effect on soft soil foundations can reach up to 44.2%; TMDs achieve an average seismic reduction of 33.4% for far-field earthquakes. The two technologies complement each other, providing new ideas for the seismic design of high-flexible towers.

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Comparison of Two Seismic Mitigation Techniques for Steel–Concrete Wind Turbine Towers: Tuned Mass Damper vs. Tuned Mass Damper Inerter

  • 会议论文

  • 发表日期：

    2026年

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  • Weijun Zeng,
  • Hao Wei,
  • Guangyi Gao,
  • Xiaogang Huang

摘要

Steel–Concrete Hybrid Tower (SCHT) has become the mainstream structures for supporting onshore wind turbines with hub heights above 120 m. However, the increased self-weight of the concrete section leads to a significant increase in the base moment under seismic loads, and the contribution rate of higher modes can reach up to 57% (the first mode of a 160 m tower only accounts for 22%–43%). To address this multi-modal amplification, this paper integrates two innovative studies: 1) Tuned Mass Damper Inerter (TMDI): By amplifying the mass effect with an inertial mass element (β), a single device can suppress multi-modal vibrations; 2) Tuned Mass Dampers (TMDs): Multiple damper parameters are optimized in groups to control each mode specifically. The study shows that TMDI can significantly reduce the base moment of the structure through the combination of small mass and large inertial mass (β ≥ 3μ), and the reduction effect on soft soil foundations can reach up to 44.2%; TMDs achieve an average seismic reduction of 33.4% for far-field earthquakes. The two technologies complement each other, providing new ideas for the seismic design of high-flexible towers.