Galloping characteristics of catenary positive feeder considering aerodynamic damping  

计及气动阻尼效应的接触网正馈线舞动特性

作　　者：LI Yanzhe JIN Xianglong ZHAO Shanpeng ZHANG Youpeng WANG Sihua LI Wanrun 李彦哲;金相龙;赵珊鹏;张友鹏;王思华;李万润(兰州交通大学自动化与电气工程学院,甘肃兰州730070;甘肃长风电子科技有限责任公司电子技术研究所,甘肃兰州730070)

机构地区：[1]School of Automatic and Electrical Engineering,Lanzhou Jiaotong University,Lanzhou 730070,China [2]Electronic Technology Research Institute of Gansu Changfeng Elctronics Technology Co.,Ltd.,Lanzhou 730070,China

出　　处：《Journal of Measurement Science and Instrumentation》2025年第1期142-153,共12页测试科学与仪器(英文版)

基　　金：supported by National Natural Science Foundation of China (No.51867013);Natural Science Foundation of Gansu Province (No.20JR5RA414)。

摘　　要：The purpose of this study is to analyze the galloping characteristics of the catenary positive feeder in fluctuating wind areas considering dynamic-wind angle of attack and aerodynamic damping.Firstly,the flow field model of the catenary positive feeder was established,the fluctuating wind field was simulated by Davenport wind power spectrum and linear filtering method,and the wind speed at inlet in calculation domain was controlled by editing the profile file to simulate and calculate the aerodynamic characteristics of the positive feeder in the fluctuating wind area.Then,taking the positive feeder as the research object,the mathematical model of actual structure and the corresponding finite element model were established.By applying the wind load to the finite element model,the influence of aerodynamic damping caused by the self-movement of the positive feeder on the galloping response was analyzed,and the frequency domain characteristics of galloping displacement of the positive feeder considering aerodynamic damping were studied.Finally,the calculation method of aerodynamic damping by the Guidelines for Electrical Transmission Line Structural Loading(ASCE No.74)was used for the galloping response of the positive feeder and compared with the proposed method.The results show that when considering aerodynamic damping,the galloping amplitude of the positive feeder decreases significantly,and the first-order resonance effect on the vertical displacement and horizontal displacement decreases significantly.The galloping trajectories calculated by the two methods are consistent.Therefore,this study is of great significance to further clarify the ice-free galloping mechanism of the catenary positive feeder in violent wind areas.本研究分析脉动风场下计及动态风攻角与气动阻尼的接触网正馈线舞动特性。首先,建立实际尺寸的接触网正馈线流场模型,利用Davenport风功率谱以及线性滤波法模拟脉动风场,并通过编辑Profile文件控制计算域入口风速,仿真计算脉动风场下正馈线气动特性。其次,建立接触网正馈线结构动力学数学模型与有限元模型,并对正馈线有限元模型施加风荷载,仿真分析正馈线自身运动引起的气动阻尼对其舞动响应的影响,研究计及气动阻尼的正馈线舞动位移的频域特性,同时与ASCE No. 74中计算气动阻尼方法进行对比。结果表明,考虑气动阻尼效应时正馈线舞动幅值显著减小,竖直位移与水平位移一阶共振效应明显减弱,两种方法计算所得舞动轨迹较吻合。本研究对于进一步明确大风区接触网正馈线无覆冰舞动机制具有重要的意义。

关 键 词：positive feeder aerodynamic damping fluctuating wind area galloping characteristics nonlinear dynamic analysis 

分 类 号：TH2[机械工程—机械制造及自动化]