摘要
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。
Contraposing the galloping of iced bundled conductors,a kind of analysis method for galloping amplitude is proposed based on the work and energy principle.The expression for amplitude increment of galloping through a cycle is deduced.The analysis process accords with the engineering practice.The functions of all items in aerodynamic forces on iced bundled conductors in each section of galloping amplitude is explained clearly by the expression of amplitude increment.The main part in the total work is the work from constant item and linear one in aerodynamic forces when galloping amplitude is small;the work from constant item and linear item in aerodynamic forces is near to that from nonlinear item when galloping amplitude is middle;the work from nonlinear item in aerodynamic forces is more when galloping amplitude is large.
出处
《振动工程学报》
EI
CSCD
北大核心
2012年第3期268-273,共6页
Journal of Vibration Engineering
基金
国家自然科学基金资助项目(5037706
10872053)
广西自然科学基金资助项目(2011GXNSFA018131)
广西大学拔尖创新团队建设计划(L300246)
广西大学科研基金资助项目(XBZ100167)
关键词
舞动
结冰分裂导线
气动力
振幅
子导线
galloping
bundled iced conductors
aerodynamic force
amplitude
subconductor
