分裂导线-间隔棒体系扭转刚度有限元分析

Finite Element Analysis on Torsional Stiffness of Bundled Conductors-Spacers

分裂导线的扭转刚度是分裂导线绕分裂圆中心扭转时整体具有的刚度,是导线对沿轴向施加扭矩作用的抵抗能力。针对分裂导线-间隔棒体系扭转稳定性问题,建立四分裂导线-间隔棒体系有限元模型,研究了间隔棒数量和次档距布置方式对分裂导线扭转刚度的影响。研究结果表明:分裂导线-间隔棒体系发生整体扭转,其扭转刚度由档距中部向两端逐渐增大。导线使用的间隔棒数量越多,其扭转失稳临界扭转角越大、所需的失稳临界扭矩也越大,抗扭转失稳的能力增强。次档距布置方式对于分裂导线扭转刚度的影响不明显,但对导线的扭转失稳临界扭转角有一定的影响。

The torsional stiffness of bundled conductors is the overall stiffness when the bundled conductors reversing around the center of split circle,that is the capability to resist the torque moment which is imposed by Ihe condut＇tors along axial. In allusion to the torsional stability of bundled conduetor-spaeers system, a finite element model of four bundled conductor-spacers system is built.