拉线式输电塔初始状态下预应力的分布研究  

Study on Initial Pre-stresses Distribution of Guyed Transmission Tower

作　　者：孔伟[1] 党剑[1] 单良[2] 杜海[1] 

机构地区：[1]东北电力大学,吉林吉林132012 [2]吉林省电力勘测设计院,长春130022

出　　处：《吉林电力》2010年第5期19-22,共4页Jilin Electric Power

摘　　要：针对拉线式输电塔在安装、运行过程中的受力特点,将初始状态的概念引入拉线式输电塔的受力分析中,利用有限元基本原理,推导出基于双重非线性的杆单元刚度矩阵,建立了拉线式输电塔的有限元平衡方程。利用ANSYS软件建立输电塔的索梁桁混合单元的非线性有限元模型,计算出拉线式输电塔初始状态下预应力的分布,最后通过模型试验验证了数值分析结果的正确性。According to the mechanical characteristics of guyed transmission tower in the process of installation and operation,the concept of initial state is introduced to analyze the stress condition of guyed transmission tower.Principle of finite-element method is applied to deduce the dual nonlinear bar element stiffness matrix.The guyed tower FEM equilibrium equation is established.Taking a guyed transmission tower as an example,cable-beam assembly nonlinear FEM is built by using general finite analytic software ANSYS.The pre-stress of guyed transmission tower under initial state is calculated and the result of numerical analysis is verified by model test.

关 键 词：拉线式输电塔 初始状态 预应力 非线性有限元 

分 类 号：TM753[电气工程—电力系统及自动化]