不同风向角动风下大跨越输电塔风振响应分析
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摘要
针对大跨越输电塔在不同风向角的动风作用下的动力响应,提出了一种橡胶铅芯阻尼器用于风振控制,并研究了大跨越输电塔的最不利风向角,及其横线向和顺线向的振动情况。研究表明,加设橡胶铅芯阻尼器后大跨越输电塔-线体系的位移、内力响应均有较大幅度的降低;同时位移响应与内力响应的最不利风向角不一定相同;各风向角动风作用下均会引起塔-线体系的横线向振动和顺线向振动。研究成果为将来类似的工程应用提供了参考。
The lead-rubber damper(LRD) is developed to control the wind-induced vibration of big-span electrical transmission tower under different wind directions.The most disadvantageous wind direction,transverse and longitudinal vibration of the tower are researched.According to the research on the displacement and internal force of the main material under five wind directions,the effects of wind-induced vibration controlling are obtained.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.Dynamic wind in different directions will lead to both transverse and longitudinal vibration of the tower.The results deserve to be popularised in the future.
The lead-rubber damper(LRD) is developed to control the wind-induced vibration of big-span electrical transmission tower under different wind directions.The most disadvantageous wind direction,transverse and longitudinal vibration of the tower are researched.According to the research on the displacement and internal force of the main material under five wind directions,the effects of wind-induced vibration controlling are obtained.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.Dynamic wind in different directions will lead to both transverse and longitudinal vibration of the tower.The results deserve to be popularised in the future.
引文
[1]李黎,尹鹏.大跨越输电塔-线体系风振控制研究[J].工程力学,2008,25(2):213-229.
[2]尹鹏,李黎,梁政平.粘弹铅芯阻尼器在控制输电塔风振反应中的应用[J].振动与冲击,2007,26(8):1-4.
[3]尹鹏,李黎,胡亮霞,等.橡胶铅芯阻尼器控制下输电塔风振响应研究[J].电力建设,2008,29(10):1-4.
[4]尹鹏,李黎,胡亮霞,等.大跨越输电塔的地震响应研究[J].电力建设,2008,29(12):13-17.
[5]尹鹏,李黎,胡亮霞,等.橡胶铅芯阻尼器控制下输电塔风振系数研究[J].水电能源科学,2009,27(1):187-191.
[6]黄斌,唐家祥.大跨越自立式高压输电塔风振控制[J].特种结构,1997,14(3):49-52.
[7]梁峰,李黎,尹鹏.大跨越塔-线体系数值分析模型的研究[J],振动与冲击,2007,26(2):61-65.
[2]尹鹏,李黎,梁政平.粘弹铅芯阻尼器在控制输电塔风振反应中的应用[J].振动与冲击,2007,26(8):1-4.
[3]尹鹏,李黎,胡亮霞,等.橡胶铅芯阻尼器控制下输电塔风振响应研究[J].电力建设,2008,29(10):1-4.
[4]尹鹏,李黎,胡亮霞,等.大跨越输电塔的地震响应研究[J].电力建设,2008,29(12):13-17.
[5]尹鹏,李黎,胡亮霞,等.橡胶铅芯阻尼器控制下输电塔风振系数研究[J].水电能源科学,2009,27(1):187-191.
[6]黄斌,唐家祥.大跨越自立式高压输电塔风振控制[J].特种结构,1997,14(3):49-52.
[7]梁峰,李黎,尹鹏.大跨越塔-线体系数值分析模型的研究[J],振动与冲击,2007,26(2):61-65.
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