摘要
针对吊弦故障会严重影响接触网系统正常工作的问题,本文基于有限元法,通过设计的弓网仿真模型软件,提取接触网静态形状、接触力、定位器抬升、吊弦及弹性吊索载荷等特征数据,结合时域与频域分析方法,研究吊弦断裂对接触网力学性能的影响。研究结果表明:吊弦断裂将引发接触网几何形态显著畸变。动力学分析显示,弹性吊索吊弦与跨中吊弦断裂显著提升接触力峰值,还会增大接触力离散程度从而加剧接触力波动。
Aiming at the problem that suspension string failure will seriously affect the normal work of contact network system,this paper is based on the finite element method,through the designed bow network simulation model software.Key parameters including static shape of the catenary,contact force,positioning device lifting,dropper and stitch wire load were extracted,Time-domain and frequency-domain analysis methods were applied to quantify the effects of suspension string fractures on mechanical performance.Simulation results show that:Dropper fracture will cause significant changes in the geometric shape of the catenary.The stitch wire dropper fracture and mid-span dropper fracture not only significantly increase the peak contact force level but also amplify contact force dispersion,thereby aggravating the contact force fluctuation.
作者
李银生
Li Yinsheng(China Railway First Survey and Design Institute Group Co.,Ltd.,Xi'an,China)
出处
《科学技术创新》
2025年第17期38-42,共5页
Scientific and Technological Innovation
基金
中国铁建股份有限公司科技研究开发计划课题“数字化融合勘察设计一体化成套技术研究与应用”(编号:2022-A02)。
关键词
接触网
振动响应
有限元理论
吊弦失效
弓网仿真
catenary
vibration response
finite element theory
dropper failure
pantograph-catenary simulation
