高速铁路接触网吊弦拉扭多工况耦合力学性能  

Mechanical Properties under Multiple Conditions of Tension-Torsion Coupling of Dropper of High Speed Railway Catenary

作　　者：吕笑文 刘叶诚 谭海恒 徐志彪 LV Xiao-wen;LIU Ye-cheng;TAN Hai-heng;XU Zhi-biao(School of Rail Transportation,Wuyi University,Jiangmen Guangdong 529000,China)

机构地区：[1]五邑大学轨道交通学院,广东江门529000

出　　处：《计算机仿真》2024年第8期155-160,共6页Computer Simulation

基　　金：国家自然科学基金(52105202);广东省基础与应用基础研究-面上项目(2020A1515011407)。

摘　　要：吊弦是电气化铁路接触网的重要组成部件,随着列车的不断提速,对高速铁路接触网吊弦提出了更高的要求。针对吊弦在拉-扭耦合应力下的服役工况,采用有限元仿真软件对其进行拉-扭多工况耦合模拟。仿真结果表明:纯扭转载荷作用下吊弦的轴向位移及扭转角度与扭转载荷近似呈线性正相关,沿吊弦丝线截面圆周方向,等效应力呈层状分布;拉-扭耦合应力下,其扭转角随载荷的增大而增大,但应力分布无明显规律。特别地,当耦合电流作用时,拉-扭载荷作用下,吊弦丝线的局部应力显著增大,抗变形能力降低。Dropper of railway catenary is an important component of catenary of electrified railway.With the increasing of train speed,higher requirements are put forward for dropper of high speed railway catenary.For the service condition of the dropper under the effect of tensile-torsional coupling,adopted the finite element simulation software to simulate the tensile-torsional multi-conditions.The simulation results show that the axial displacement and torsion angle of the dropper are linearly and positively corelated with the torsion load under pure torsion load.The equivalent force is distributed in a laminar pattern along the circumference of the wire section of the dropper.Under the stress of the coupled tension-torsional condition,the torsion angle increases with the increase of the load.But the stress distribution has no obvious rule.In particular,when the coupling current is applied,the local stress of the dropper increases significantly and the anti-deformation ability decreases under the tension-torsion load.

关 键 词：吊弦 数值模拟 力学性能 拉扭耦合 载流 

分 类 号：TB24[一般工业技术—工程设计测绘]