摘要
针对大跨越输电塔线体系,分别建立单导线、单塔、两基三垮塔线体系的有限元模型,将导线平面内和平面外动力特性的数值解与理论解进行比较,结果表明,所建立的模型能够较好地反映输电导线的动力特性.分析了单塔与两基三跨塔线体系的动力特性,比较了计算结果,认为低频区塔线体系的振动大多以导线的振动为主,塔架对于输电线振动频率的影响较小.
In order to obtain the dynamic characteristics of the large span transmission system, the finite element models （FEM） of the single transmission line, tower and tower-line system are made. Firstly the numerical results of the single line obtained from FEM are compared with the an- alytical results, which shows there are small differences between them. Then the dynamic character- istics of the single tower and tower-line system are calculated. By comparing and analyzing these numerical results, it can be seen that the vibration of the line plays an important role at the lower frequency, and the vibration of the tower has little effect upon the tower-line system.
出处
《上海电力学院学报》
CAS
2012年第6期501-504,共4页
Journal of Shanghai University of Electric Power
基金
上海市教育委员会重点学科(J51304)
关键词
大跨越
输电塔
塔线体系
动力特性
large span
transmission tower
tower-line system
dynamic characteristics
