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<p>Performance of viscous dampers used in transmission towers is susceptible to long-term high-temperature service conditions. In this study, an improved viscous damper is developed through a synergistic design strategy integrating a polytetrafluoroethylene (PTFE)-based composite sealing system, and multi-layer protective reinforcement to mitigate leakage-induced degradation. This study conducts accelerated ageing tests based on temperature and heating duration to systematically evaluate the durability of the novel viscous dampers. It assesses their conventional mechanical properties and fatigue performance after ageing. The results show that the present viscous damper maintains stable damping performance and energy dissipation capacity under high-temperature conditions, demonstrating effective resistance to thermal ageing within the tested range and confirming its suitability for reliable long-term service in high-temperature environments.</p>

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Experimental Study on Heat-Resistant Ageing and Mechanical Behaviours of an Innovative Viscous Damper

  • 期刊论文

  • 发表日期：

    2026年6月19日

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  • Q. Liu,
  • J. Guo,
  • T. Li,
  • W. Zhu,
  • X. Wang,
  • H. Dong,
  • D. Wang,
  • L. Yang

摘要

Performance of viscous dampers used in transmission towers is susceptible to long-term high-temperature service conditions. In this study, an improved viscous damper is developed through a synergistic design strategy integrating a polytetrafluoroethylene (PTFE)-based composite sealing system, and multi-layer protective reinforcement to mitigate leakage-induced degradation. This study conducts accelerated ageing tests based on temperature and heating duration to systematically evaluate the durability of the novel viscous dampers. It assesses their conventional mechanical properties and fatigue performance after ageing. The results show that the present viscous damper maintains stable damping performance and energy dissipation capacity under high-temperature conditions, demonstrating effective resistance to thermal ageing within the tested range and confirming its suitability for reliable long-term service in high-temperature environments.