【摘要】 为研究输电塔线体系在风荷载激励作用下变形破坏问题，通过对比分析层流风场和湍流风场下输电塔线的损伤过程，选定湍流风作为研究重点，探讨其与输电塔线体系的耦合作用风险因素；基于塔线模型受力分析，构建输电塔线风振响应的动力学模型和疲劳损伤模型，定量描述输电塔线损伤过程；使用ANSYSAPDL对不同风攻角和风速下输电塔线风振响应进行敏感性分析，对输电塔线体系风致振动损伤过程进行数值仿真，最后开展输电塔损伤识别实验对输电塔损伤部位进行验证。结果表明：90°为输电塔线体系的最不利风攻角，随着风速的增大，输电塔线体系结构的耦联性也逐渐增大，且在塔身中部和底部出现大量斜材和少量主材弯曲现象；输电塔线体系损伤破坏位置位于杆塔中下部区域，数值仿真结果和实验结果吻合较好。研究成果对于提高输电塔线体系的风荷载承载能力、优化结构设计、加强灾害风险预防具有重要指导意义。更多还原

【Abstract】 In order to study the deformation and damage of the transmission tower-line system under wind load excitation, the damage process of the transmission tower in the case of laminar and turbulent wind was compared and analyzed. Based on the hazard assessment, turbulent wind was selected as the research focus and the connecting risk factors in the transmission tower duct system were discussed. Based on the analysis of the transmission tower stress, the dynamic model and fatigue damage model of the wind-induced vibration response of the transmission tower-line were constructed to quantitatively describe the damage process of the transmission tower-line. ANSYSAPDL software were carried out to analyze the sensitivity of wind-induced vibration responses in transmission tower ducts at different wind attack angles and wind speeds, and numerical simulations were carried out on the wind-induced vibration damage process in transmission tower duct systems. Finally, an experiment was carried out to identify damage to the transmission tower to verify damage to the transmission tower parts. The research results showed that: 90° is the most unfavorable wind attack angle in the transmission tower duct system. As the wind speed increases, the structural coupling of the transmission tower duct system gradually increases, and a large number of inclined timber and a small amount of main timber bending appear in the middle and bottom of the tower body. The damage location of the transmission tower-line system is located in the middle and lower part of the tower. The numerical results agreed well with the experiment data. The research results have important guiding significance for improving the wind load carrying capacity of transmission tower-line system, optimizing structural design and strengthening disaster risk prevention.更多还原