论文部分内容阅读
研究了悬挂质量摆对大跨越输电塔-线体系的风振控制。通过单自由度体系悬挂质量摆的运动方程,推导得出悬挂质量摆对输电塔的控制运动方程。分别采用梁单元、杆单元和悬链线单元,对输电塔、绝缘子和输电线进行了精确的模拟。考虑输电线的几何非线性,建立了大跨越输电塔-线体系的三维有限元模型,并计算了其动力特性。介绍了悬挂质量摆的模拟及其参数取值,应用谐波叠加法模拟了脉动风速时程。分别对输电塔和大跨越输电塔-线体系的风振控制效果进行了分析。研究结果表明,悬挂质量摆可以减小输电塔-线体系的风振反应。
The wind-induced vibration control of suspension mass pendulum to large-span transmission tower-line system is studied. The equation of motion of suspension mass pendulum to transmission tower is deduced through the equation of motion of pendulum mass pendulum with single degree of freedom system. The beam units, rod units and catenary units are respectively used to accurately simulate transmission towers, insulators and power transmission lines. Considering the geometric nonlinearity of transmission line, a three-dimensional finite element model of long-span transmission tower-line system was established and its dynamic characteristics were calculated. The simulation of suspension mass pendulum and its parameter values are introduced. The time history of pulsating wind speed is simulated by harmonic superposition method. The wind-induced vibration control effects of transmission towers and long-span transmission tower-line systems are respectively analyzed. The results show that the suspension mass pendulum can reduce the wind-induced vibration response of transmission tower-line system.