输电塔体内拉索——杠杆惯容阻尼系统风振控制及参数优化  

Wind-induced Vibration Control and Parameter Optimization of the Cable-lever Rotation Inerter System in the Transmission Tower

作　　者：曹枚根 张若愚 Cao Meigen;Zhang Ruoyu(School of Civil Engineering,North China University of Technology,Beijing 100144,China;School of Mechanics Engineering Science of Shanghai University,Shanghai 200444,China)

机构地区：[1]北方工业大学,土木工程学院,北京100144 [2]上海大学,力学与工程科学学院,上海200444

出　　处：《震灾防御技术》2024年第1期180-190,共11页Technology for Earthquake Disaster Prevention

基　　金：国家电网有限公司总部指南科技项目(5200-201919121A-0-0-00);浙江省电力实业总公司科技项目(CF058807002021006)。

摘　　要：输电塔作为受风控制的高耸空间钢结构,风振控制技术是解决铁塔风灾受损、倒塔的重要技术手段之一。针对现有输电塔风振控制技术适应性不足的问题,提出了可在自立式输电塔体内布置的拉索-杠杆式旋转惯容阻尼器(CLRID)和优化设计方法。首先推导了CLRID典型平面刚架运动方程,然后开展了基于脉动风荷载特性的CLRID减振性能参数分析,最后考虑塔架性能需求对CLRID进行参数优化,得到固定布置夹角下的CLRID最优设计参数。研究结果表明,除惯容对阻尼单元变形的放大效应外,杠杆可实现对阻尼单元的二次放大作用,继续增大阻尼器行程,可弥补传统体内拉索体系斜向布置的缺陷,使具有不同拉索布置角度的CLRID对塔架具有相同的位移响应控制效果。同时,通过参数优化分析,CLRID拉索布置角度可控制在30°~50°,杠杆放大系数可控制在1~2。当确定目标减振比后,基于输电塔塔架性能的优化设计方法可使CLRID实现精准的风振控制。As a high-rise space steel structure controlled by wind,the wind vibration control technology is one of the important technical means to reduce the risk of wind damage and tower collapse of the transmission tower.Aiming at the problem of inadequate adaptability of existing wind vibration control technology for transmission towers,a cable-lever rotation inerter system and its optimization design method that can be installed in the body of self-supporting transmission towers are proposed.Firstly,the motion control equations of a typical transmission tower sections with a cable-lever rotation inerter damper(CLRID)are established,and then the parameters of CLRID are analyzed based on the fluctuating wind load characteristics for vibration control.Finally,the parameters of CLRID are optimized in considering the performance demand of the tower,and the optimal designed parameters of CLRID are obtained under a fixed installed angle.Our results show that,in addition to the amplification effect of inerter on the deformation of damping element,the secondary amplification effect of damping element in RID can be realized by lever mechanism,and continue to increase the deformation of damper,which can make up for the shortcomings of oblique installation of traditional internal cable system,so that CLRID with different cable angles has the same control effect of displacement responses of tower.At the same time,through parameter optimization analysis,it is recommended that the installed angle of cable of CLRID can be controlled between 30°~50°,and the lever amplification factor can be controlled between 1~2.When the target vibration mitigation ratio is determined,wind-induced vibration control of the transmission tower can be achieved precisely by the optimal design method of CLRID based on the performance demand.

关 键 词：输电塔 阻尼器 拉索-杠杆系统 惯容 随机响应 H_(2)优化设计 风振控制 

分 类 号：TM75[电气工程—电力系统及自动化] O328[理学—一般力学与力学基础]