覆冰四分裂导线舞动过程中的次档距振动研究
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摘要
采用数值方法对典型覆冰四分裂导线舞动过程做了模拟,重点分析了导线舞动过程中的次档距振动现象和特征,根据数值模拟结果探讨了覆冰四分裂各子导线之间驰振幅值和轨迹等特征的差异.结果表明,在舞动过程中,导线除整档运动外,还会发生档内振动,且各子导线舞动轨迹均存在差异.研究结论对四分裂导线驰振机理的研究及防振有一定的参考意义.
The galloping of quad bundle conductors is simulated by the numerical method,and the sub-span oscillation phenomena and characteristics during galloping are investigated.Based on the numerical simulation results,the differences of galloping amplitude and traces between the iced quad bundle sub-conductors are discussed.The results show that during the galloping process,besides the whole movement,the sub-span oscillation will occur,and the galloping traces of all the sub-conductors are different from each other.These obtained results provide the necessary referential data to the investigation of the oscillation mechanism of the iced bundled conductors and the development of the anti-oscillation technology.
The galloping of quad bundle conductors is simulated by the numerical method,and the sub-span oscillation phenomena and characteristics during galloping are investigated.Based on the numerical simulation results,the differences of galloping amplitude and traces between the iced quad bundle sub-conductors are discussed.The results show that during the galloping process,besides the whole movement,the sub-span oscillation will occur,and the galloping traces of all the sub-conductors are different from each other.These obtained results provide the necessary referential data to the investigation of the oscillation mechanism of the iced bundled conductors and the development of the anti-oscillation technology.
引文
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[9]周林抒,严波,张亮,等.新月形覆冰八分裂导线舞动特征研究[J].振动与冲击,2015,34(18):183-189.
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[2]Den Hartog J P,Transmission line vibration due to sleet[J].Trans Am Inst Electr Eng,1932,51(4):1074-1086.
[3]李万平,杨新祥,张立志.覆冰导线群的静气动力特性[J].空气动力学学报,1995,13(4):427-434.
[4]严波,李文蕴,张宏雁,等.覆冰三分裂导线舞动的数值模拟方法[J].振动工程学报,2010,29(9):107-112.
[5]张宏雁,严波,周松,等.覆冰四分裂导线静态气动力特性试验[J].空气动力学学报,2011,29(2):150-154.
[6]胡景,严波,祖正华,等.一种新型防舞器及其机理研究[J].工程力学,2011,27(2):784-792.
[7]严波,胡景,周松,等.随机风场中覆冰四分裂导线防舞研究[J].振动与冲击,2011,28(9):200-206.
[8]刘小会,韩勇,陈世民,等.连续档覆冰导线舞动数值模拟及参数分析[J].力学与实践,2014,6(1):1-6.
[9]周林抒,严波,张亮,等.新月形覆冰八分裂导线舞动特征研究[J].振动与冲击,2015,34(18):183-189.
[10]张殿生.电力工程高压送电线路设计手册[M].第2版.北京:中国电力出版社,2003.