输电塔线耦联体系的自振特性的研究.pdfVIP

第六届全国土木工程研究生学术论坛 清华大学 2008 输电塔线耦联体系的自振特性研究 王雷 1 , 刘海卿 1,2 （1．辽宁工程技术大学土木建筑工程学院，辽宁阜新 123000 ；2.大连理工大学土木水利学院，辽宁大连 116024 ） 摘 要：输电塔线体系是由导线和各个钢塔连接而成的连续体系，是一种复杂的空间塔线耦联体系，其导地线的质量很 大，将对输电塔的动力特性产生较大的影响。本文针对 220kv 现役输电线路为工程实例，利用有限元分析软件 ANSYS 建 立了该体系的有限元分析模型。采用子空间迭代法分析研究了该体系的动力特性和单塔的动力特性，为了便于比较,分别 从单塔、塔和导线、以及塔、导线和绝缘子的联合振动来分析输电塔的动力特性。通过在各种情况下对塔的振动频率和 振型的比较，表明导线对输电塔的动力特性有一定的影响，不可忽略，并宜作进一步的研究和实验。 关键词: 输电塔；耦联体系；自振特性 Studies Of Dynamic Characteristics Of Electrical Transmission Tower-line Coupled System 1 1,2 WANG Lei ,LIU HaiQing (1,College of Civil Engineering and Architectur Liaoning Technical University,fuxin123000; 2, School of Civil Hydraulic Engineering, Dalian University of Technology,dalian16024) Abstract: Transmission tower-line system is complicated and coupled system ,which are consisted of high –rise steel towers and long span transmission lines which produced great effect for the dynamic characteristics of tower. With ANSYS a finite-element-method programe,model of transmission tower-line system is established.,which is one practical 220kv transmission line engineering .dynamic characcteristics of system and single tower are analyzed by subspace iteration method . For ease of comparison, separately from the independent tower, the tower and the wire, as well as the tower, the wire and insulators union vibration analyzes the transmission tower the dynamic performance.Through the comparison of frequency and amplitude indicate the influence of wires , which can’t be neglected , it will be done further research and experiment suitably. Key words: transmission tower ; coupled system ; dynamic characteri