单导线覆冰舞动的非线性数值模拟  

Nonlinear Numerical Simulation of Single Iced Conductor Sway

作　　者：胡紫东[1,2] 李黎[1,2] 程志远[1,2] 龙晓鸿[1,2] 

机构地区：[1]华中科技大学土木工程与力学学院,湖北武汉430074 [2]华中科技大学控制结构湖北省重点实验室,湖北武汉430074

出　　处：《水电能源科学》2011年第7期156-159,7,共5页Water Resources and Power

基　　金：国家电网公司科技基金资助项目(SGKJ[2007]413);国家自然科学基金资助项目(50878093);湖北省自然科学基金资助项目(2009CDB418)

摘　　要：提出了一种单导线覆冰舞动的数值模拟方法,基于更新拉格朗日列式推导了可考虑轴向扭转和大变形效应的两节点索单元,建立了连续多档导线舞动的有限元模型,采用四阶荣格库塔法对覆冰导线的舞动进行了数值求解,并研究了初始张力对舞动的影响。算例结果表明,该方法可行、有效,且具有较高的计算效率。A nonlinear numerical simulation of single iced conductor sway is proposed. Based on the virtual work equation of updated Lagrangian formulation, a finite element with two-node curved cable element for the axial torsion and geometrical nonlinear is developed, and finite element model of multi-span transmission line for sway analysis is established. The sway model of iced conductor is solved by the fourth-ordered Runge-Kutta method. At the same time, the impact of initial tension on iced conductor sway is studied. The results show that the proposed method is effective and feasible, and it has high computational efficiency.

关 键 词：覆冰导线 舞动 曲线索单元 数值模拟 

分 类 号：TM75[电气工程—电力系统及自动化] O39[理学—工程力学]