分裂导线次档距振荡研究  

Subspan oscillation of bundle conductors

作　　者：李黎[1,2] 王腾飞[1,2] 陈元坤[3] 

机构地区：[1]华中科技大学土木工程与力学学院,武汉430074 [2]华中科技大学控制结构湖北省重点实验室,武汉430074 [3]中南建筑设计院股份有限公司,武汉430071

出　　处：《振动与冲击》2014年第17期62-67,共6页Journal of Vibration and Shock

基　　金：国家自然科学基金资助项目(50878093)

摘　　要：基于准定常理论,建立了分裂导线次档距振荡的二维振子模型,推导了振子模型的振动方程。采用稳定性理论对振子模型进数值分析,研究了分裂导线次档距振荡的机理,首先将非线性振动微分方程线性化,然后根据特征值分析判断系统的稳定性。编制了次档距振荡发生临界风速求解的MATLAB程序,并对Hopf动态分岔理论、Hopf静态分岔理论和不同阻尼比下的临界风速进行了研究,并给出了临界风速随频率比变化的关系,最后对次档距振荡的控制给出了建议。Based on th bundle conductors was built e quasi-static aerodynamic theory, the oscillator model of 2-DOF for subspan oscillation of and its vibration equations were derived. The numerical analysis was conducted using the stability theory and the mechanism study on subspan oscillation of bundle conductors was made. Firstly, the nonlinear vibration equations were linearized. Then, the stability of the system was determined according to eigenvalue analysis. MATLAB program for subspan oscillation of bundle conductors was compiled. The critical wind speed was studied under Hopf dynamic bifurcation theory, Hopf static bifurcation theory and different damping ratios. The relationship between the critical wind speed and frequency ratio was deduced. Finally, some suggestions for the control of subspan oscillation of bundle conductors were presented.

关 键 词：分裂导线 次档距振荡 机理 稳定理论 控制 

分 类 号：TM726[电气工程—电力系统及自动化]