大跨越输电塔线的断线振动及控制  

Wire-breaking Induced Vibration and Control of Long-span Electric Transmission Tower-line System

作　　者：夏正春[1] 梁政平[1] 李黎[1] 尹鹏[1] 

机构地区：[1]华中科技大学土木工程与力学学院,武汉430074

出　　处：《武汉理工大学学报》2008年第9期84-88,共5页Journal of Wuhan University of Technology

基　　金：国家电网公司科技项目([2007]413)

摘　　要：借助有限元软件ANSYS/LS-DYNA,建立塔-线耦合模型,采用显式动力分析技术,探讨塔-线体系对断线响应的仿真方法。同时,在塔头安装铅芯橡胶阻尼器,研究该阻尼器对体系断线相应的振动控制效果。通过汉江大跨越算例,验证了断线仿真方法的实用性和铅芯橡胶阻尼器对输电塔在线路断线作用下振动控制的有效性。A complete finite element model of a long-span transmission tower-line system is established with the generalized commercial finite dement dynamic program ANSYS/LS-DYNA, and the explicit dynamical integral method is employed to solve the dynamic responses of tower-line system to broken wires. Additionally, lead-rubber dampers are installed on head of tower to control the vibration induced by broken wires. With an example of long span transmission crossing Hanjiang River, it is seen that the dynamic simulation approach introduced in this paper can demonstrate the kinetic process of tower-line system subjected to wire ruptures. Meanwhile, it is performed that lead rubber damper is available to reduce the dynamic response of tower.

关 键 词：塔线耦合 断线 动力冲击作用 振动控制 铅芯橡胶阻尼器 

分 类 号：TU311.3[建筑科学—结构工程]