【摘要】 本文研究了大跨越输电塔-线体系风控效果的敏感性和橡胶铅芯阻尼器的实用性,从橡胶铅芯阻尼器的变形、刚度和阻尼各自的减振效果等方面验证了阻尼器的风控效果。研究表明:阻尼器控制后大跨越输电塔-线体系的位移响应均大幅降低;各风向角动风作用下均会引起大跨越输电塔-线体系的横线向和顺线向振动;同时,位移响应的最不利风向角与内力响应的最不利风向角不一定相同。塔高和输电线张力均会影响大跨越输电塔-线体系的横线向与顺线向的位移和加速度响应和风控效果。在设计风速下,安装于优化位置的橡胶铅芯阻尼器均能正常工作,其刚度和阻尼对大跨越输电塔-线体系的风控效果均有贡献,阻尼发挥了主导作用。更多还原

【Abstract】 In this paper,the sensitivity of the controlling effect and the practicality of LRD were studied for large-span transmission tower-line system.According to the research on the displacement of the main material under five wind directions,the effects of wind-induced vibration controlling were obtained.Dynamic wind in different directions would lead to both transverse and longitudinal vibration of the tower.The most disadvantageous wind direction of the displacement and inner force are not always identical,so the different input wind direction in engineering design should be considered.According to the research on the deformation,stiffness and damping effect of LRD,the controlling effect is verified.The response and controlling effect of displacement and acceleration in transverse and longitudinal would be affected by tower height and tension of transmission lines.It is also proved that: all the LRD are ensured to work under design wind velocity according to the research on LRD deformation;and the controlling effect is not ideal when only member stiff is increased according to the research on controlling effect under dynamic wind when apply only stiff to the members on which the dampers used to be applied.更多还原