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覆冰导线舞动的数值计算分析

发表时间:2015-05-31  浏览量:1795  下载量:467
全部作者: 秦力,徐天元
作者单位: 东北电力大学建筑工程学院
摘 要: 利用假设模态法模拟导线舞动,导线的舞动表示为3个广义坐标。为避免繁琐的矢量运算,从能量角度采用Lagrange 法建立覆冰导线的非线性运动方程,并用Runge-Kutta数值计算法求解运动方程并得到顺风向、横风向和扭转向导线舞动的时程响应。根据Lyapunov的第一稳定性理论推导出覆冰导线舞动的临界风速计算公式,并利用试验导线验证该数值求解和临界风速的可行性。
关 键 词: 土木建筑结构;覆冰导线;舞动;Runge-Kutta;临界风速
Title: Numerical analysis of the iced transmission line galloping
Author: QIN Li, XU Tianyuan
Organization: School of Civil Engineering, Northeast Dianli University
Abstract: Assumed mode method had been used to simulate the iced transmission line galloping. Three generalized coordinates represented the iced transmission line galloping. In order to avoid complicated calculation of vector, the Lagrange equation had been used to build the nonlinear equations of iced transmission line from the perspective of energy. The Runge-Kutta numerical calculation had also been used to solve the equations of motion and get the across-wind, along-wind and torsional response of iced transmission line. Based on the first Lyapunov stability theory, the critical wind speed formula of the iced transmission line galloping was deduced. The feasibility of the numerical solution and the critical wind speed had been verified by using a test iced transmission line.
Key words: civil construction structures; iced transmission line; galloping; Runge-Kutta; critical wind velocity
发表期数: 2015年5月第10期
引用格式: 秦力,徐天元. 覆冰导线舞动的数值计算分析[J]. 中国科技论文在线精品论文,2015,8(10):1014-1021.
 
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