安装防振锤的分裂导线自由振动的有限元计算  

A FINITE ELEMENT FOR 3D FREE VIBRATION ANALYSIS OF BUNDLED POWER LINES WITH WEIGHT HAMMERS

作　　者：何锃[1] 赵高煜[1] 

机构地区：[1]华中科技大学力学系,武汉430074

出　　处：《工程力学》2003年第1期101-105,共5页Engineering Mechanics

基　　金：国家自然科学基金资助项目(19872026);教育部高等学校骨干教师资助计划项目

摘　　要：提出了大跨越分裂导线的一种新型三维有限元模型,它可以直接处理安装防振锤的子导线。针对导线运动的小应变和小转角特点,结合间隔棒对导线的约束关系,推导建立了单元质量和刚度矩阵。应用获得的公式体系对实际大跨越分裂导线进行了自由振动计算,与实测结果比较,表明本文的方法和结果可靠、有效。A new finite element with two nodes and eight degrees of freedom is developed for simulating three dimensional free vibrations of bundled conductors. The element consists of two spacers, all sub-conductor segments between the spacers and the weight hammers connected to conductors. Based on the linearized governing differential equations of the conductor, the mass matrix and the stiffness matrix of the element are derived. The constraining conditions between sub-conductors imposed by spacers and the dynamic effects induced by weight hammers are considered in the formulation of the element. A power line structure with three bundled sub-conductors and three spans is studied using the element. Numerical results are compared with measured data, showing that the method in this paper is reliable and effective.

关 键 词：防振锤 分裂导线 自由振动 有限元 高压输电线路导线 覆冰舞动 

分 类 号：TM75[电气工程—电力系统及自动化] O32[理学—一般力学与力学基础]