摘要
基于覆冰导线所受空气动力的特殊性和导线大幅运动的几何非线性,采用具有3个平动自由度和1个扭转自由度的二节点单元获得覆冰导线非线性动力学有限元方程,并采用对加速度中心差分、对速度向后差分的时间积分法求解有限元方程,编制了相应的计算程序,并以算例验证该方法的正确性。
Based on the geometrical non-linearity of icing conductor by large amplitude motion and particularity caused by aerodynamic force,two-node cable element with three-translational and one-torsion degrees-of-freedom at each node is applied to establish nonlinear dynamic finite element equation of icing conductor.In the procedure of numerical simulation,the finite element equation is solved by time integration method,which the central difference method is used to deal with acceleration and the velocity is handled by backward difference method.At the same time,the finite element program is developed.Finally,numerical examples verify the effectiveness of the proposed method.
出处
《水电能源科学》
北大核心
2011年第2期161-163,共3页
Water Resources and Power
关键词
覆冰导线
舞动
几何非线性
有限元
数值模拟
icing conductor
galloping
geometric nonlinear
finite element
numerical simulation
