摘要
为提升高速铁路接触网弹性吊索的服役可靠性与维修安全性,提出一种基于形状反演计算的接触网弹性吊索张力非接触测量方法。首先基于几何原理,定义了表征弹性吊索状态的接触网几何特征参数,并建立基于线路坡道信息的接触网高度修正模型;然后基于抛物线方程,通过对带张力非等高悬挂绳索的受力分析求解出弹性吊索上的吊弦力,再结合力矩平衡原理,推导了接触网几何参数、吊弦力与弹性吊索变形量的静力学关系,建立了弹性吊索的张力与接触网几何形状解析模型。试验表明,相较于有限元仿真计算结果,该解析模型的相对误差平均值为2.3%;相较于11组不同线路位置下弹性吊索张力的直接测量结果,该解析模型的相对偏差平均值为3.8%,验证了该模型的计算精度与工程适用性。利用行业既有技术非接触式测量接触网几何形状参数,再通过该解析模型反演计算弹性吊索张力,实现了弹性吊索张力的非接触测量,从而避免了接触式测量的繁琐准备工作与高空作业风险,大幅度降低了测量所需的配合人员数量,实现了弹性吊索的张力带电监测与性能评估。
To enhance the operational reliability and maintenance safety of high-speed railway catenary elastic slings,a non-contact measurement method of catenary elastic slings tension based on shape inversion calculation was proposed.First,the geometric characteristic parameters of catenary that represent the state of elastic slings were defined based on geometric principles.The height correction model of catenary based on the information of line slope was established.Then,the suspending force on the elastic sling was solved by the force analysis of the unequal height suspension rope with tension,which was based on the parabola equation.Afterwards,the static relationship between the geometric parameters of the catenary,the sling force and the deformation of the elastic sling was deduced based on the principle of moment balance.Finally,an analytical model of the tension and catenary geometry of the elastic sling was established.The experiment shows that the average relative error of the analytical model is 2.3%compared with the result of finite element simulation.As compared to the direct measurement results of elastic sling tension under 11 different working conditions,the analytical model showcases an average relative deviation of 3.8%,affirming the model’s precision and practicality.The existing technology in the railway industry is able to measure the geometric parameters of the catenary in a non-contact way,and the geometric parameters can be used to calculate elastic sling tension through the proposed model.Thus,it avoids the tedious preparation work and high-altitude operation risk of the contact measurement,greatly reducing the number of coordination personnel required for the measurement,and realizing the online monitoring and performance evaluation of the elastic sling.
作者
陈俊卿
刘继冬
关金发
吴积钦
陈维荣
CHEN Junqing;LIU Jidong;GUAN Jinfa;WU Jiqin;CHEN Weirong(School of Electrical Engineering,Southwest Jiaotong University,Chengdu 611756,China)
出处
《铁道科学与工程学报》
EI
CAS
CSCD
北大核心
2023年第8期2824-2834,共11页
Journal of Railway Science and Engineering
基金
国铁集团科研开发计划(N2021G029,P2021G053)。
关键词
非接触测量
张力
高速铁路
接触网
弹性吊索
non-contact measurement
tension
high-speed railway
catenary
elastic sling
作者简介
通信作者:关金发(1987-),男,广东中山人,讲师,博士,从事铁路接触网全寿命周期与仿真研究,E-mail:kwan_swjtu@foxmail.com。
