摘要
提出一种新型减振防舞器,利用单自由度模型研究其防舞机理。针对典型线路段,采用计算力学方法建立覆冰分裂导线和防舞器的有限元模型,结合新月形覆冰四分裂导线空气动力系数随攻角变化的风洞试验结果,对覆冰四分裂导线舞动与防舞器抑舞过程进行数值模拟,进而对该新型减振防舞器进行参数优化分析。数值模拟结果表明,该防舞器对垂直舞动的防止效果明显,具有工程应用前景。
A new anti-galloping device is presented, and a single-degree-freedom dynamic model is employed to investigate the anti-galloping mechanism of this device. A typical finite element model of transmission lines including iced conductor and the anti-galloping devices is set up by the computational mechanics method. The galloping in the case without an anti-galloping device and the galloping inhibition as the anti-galloping devices are mounted on the typical line are numerically simulated based on the aerodynamic coefficients of the iced quad-bundled conductor varying with attack angles determined by wind tunnel tests. Furthermore, the parameter optimization of the anti-galloping device is numerically carried out. The numerical results show that the effect of the new anti-galloping device is evident and the device is prospective in engineering applications.
出处
《工程力学》
EI
CSCD
北大核心
2011年第9期200-206,共7页
Engineering Mechanics
基金
国家电网公司科技项目(2007-1-77)
重庆市自然科学基金项目(CSTC
2009BB7367)
中央高校基本科研业务费项目(CDJXS10241102)
关键词
计算力学
覆冰分裂导线
防舞器
防舞机理
参数优化
computational mechanics
iced quad-bundled conductor
anti-galloping devices
mechanism of anti-galloping
parameter optimization
