基于ABAQUS的输电线找形与分裂导线模拟研究

Form-finding Method of Transmission Line and the Simulation of Bundle Conductor Based on ABAQUS

架空输电线是输电塔-线体系的重要组成部分,但由于几何非线性特征强,难以直接得到输电线的初始形态。基于ABAQUS有限元分析软件,提出更新形状法和更新张力法两种输电线找形方法,建立单导线模型作为算例进行分析与对比。研究结果表明,两种找形方法均具有很高的精确性,而在操作性和适用范围方面存在区别。由于新建输电线路的需求,分裂导线越来越多地被应用于输电线路中,考虑间隔棒与分裂导线间的耦合作用,提出一种分裂导线的模拟方法,可以实现分裂导线的精细模拟,并通过简化模型和精细化模型的动力特性对比,验证模拟的准确性。提出的输电线找形方法和分裂导线模拟方法可以为输电线路精确建模和分析提供参考。

As an important part of transmission tower-line systems,overhead transmission lines have extremely strong geometric non-linear characteristic,which makes it difficult to abtain the initial configuration of transmission lines directly.Based on ABAQUS finite element analysis software,two transmission line form-finding methods were proposed,which are method of updating shape and method of updating tension.And then taking a single wire model as an example,the results were analyzed and compared to prove that the two form-finding methods have high accuracy,but there were differences in operability and application range.In addition,due to the demand for new transmission lines,bundle conductors are applied increasingly in transmission lines.Considering the coupling effect between the spacer and bundle conductor,a simulation method of the bundle conductor was proposed,which can realize a refined simulation of the bundle conductors.The accuracy of the simulation was verified by comparing the dynamic characteristics of the simplified model and the refined model.The form-finding methods and bundle conductor simulation method proposed in this paper can provide reference for accurate modeling and analysis of transmission lines.