结冰分裂导线舞动振幅分析

针对结冰分裂导线舞动问题,从功能的角度提出了一种舞动振幅的分析方法。导出了舞动振幅经历一个周期增量的表达式。所导出的舞动振幅增量的表达式说明了作用在结冰分裂导线上的气动力的各项在舞动振幅不同阶段的作用。得到的结论是:当舞动的振幅较小时,气动力中常数项与线性项的功是气动力总功中的主要部分;当舞动的振幅为中等时,气动力中常数项与线性项的功与非线性项的功在气动力总功中的比例相近;当舞动的振幅为较大时,气动力中非线性项的功在气动力总功中的比例大于常数项与线性项的功在气动力总功中的比例。

Analysis of Galloping Amplitude of Bundled Iced Conductors

Contraposing the problem of galloping of iced bundled conductors ,a kind of analysis method of amplitude of galloping of iced bundled conductors is proposed from the relation between work and energy.The expression of amplitude increment of galloping of iced bundled conductors through a cycle is educed. The analysis process of amplitude of galloping of iced bundled conductors accord with engineering practice. The functions of linear item and nolinear item of aerodynamic force on iced bundled conductors in each section of galloping amplitude is explained clearly by the expression of amplitude increment of galloping of iced bundled conductors. The conclusion gotten from the expression of amplitude increment of galloping of iced bundled conductors are that galloping of iced bundled conductors is sprang by linear item of aerodynamic force and intensified by nolinear item of aerodynamic force.