【摘要】 构建了SDG42终端塔和ZB39直线塔的两种有限元模型,通过模态分析对比分析其振型。构建了ZB33一塔两线有限元模型,通过引入质量单元mass21和构建输电线两种形式,考虑输电线和输电铁塔两者的耦合作用并分析其模态,发现以质量点的形式考虑输电线对输电塔的模态影响作用,计算所得的铁塔自振频率偏小,计算数值很接近。更多还原

【Abstract】 The SDG42 tension resistance tower and the ZB39 tangent tower are established. Their natural frequencies and mode shapes are contrasted after modal analyses. The one tower with two lines system of ZB39 tangent tower is modeled. By introducing the mass21 element and modeling the transmission line section respectively, the coupling effect of transmission line section and transmission tower is detected. It is found that when considering the effect of transmission line section in the form of mass point, the fundamental natural frequency of this tower-line system tends to be smaller than that of the single tower.更多还原