400 km/h接触网系统导线工作张力选取研究

Research on the Selection of Wire Tension in Overhead Contact System of 400 km/h

研究目的:400km/h接触网系统尚无相关技术标准及工程应用,接触网导线及张力体系属于弓网系统核心关键技术。本文依托CR450科技创新工程,从400km/h更高速度下接触网系统电气、机械及弓网受流等性能需求出发,剖析接触网导线张力选取的关键因素,提出科学合理的技术路线,通过弓网动态耦合仿真以及结构有限元分析等,优配出400km/h接触网导线截面及张力组合,并开展工程适应性分析,完成接触网系统方案及参数校验,最终提出400km/h接触网导线截面及张力组合,建立400km/h接触网系统的关键技术参数。研究结论:(1)增大接触线工作张力能有效提升弓网动态耦合性能,适当提升承力索工作张力能有效抑制定位点动态抬升、降低吊弦荷载;(2)400km/h接触网系统导线工作张力优选截面150mm^(2)接触线(额定工作张力36kN)和截面120mm^(2)承力索(工作张力28kN);(3)形成的400km/h接触网系统参数,在弓网受流、悬挂布置、装备性能以及施工、维修等方面,均具有很好的工程适应性和可实施性;(4)本研究成果可为轨道交通领域高速铁路工程建设提供参考和借鉴。

Research purposes:The 400 km/h catenary system has no relevant technical standards and engineering applications.The catenary wire and tension system belong to the core key technology of the pantograph and catenary system.Based on the CR450 scientific and technological innovation project,starting from the performance requirements of the catenary system electrical,mechanical and pantograph-catenary current at a higher speed of 400 km/h,this paper analyzes the key factors for the selection of catenary wire tension,and proposes a scientific and reasonable technical route.Through pantograph-catenary dynamic coupling simulation and structural finite element analysis,the cross-section and tension combination of 400 km/h catenary wire are optimally allocated,and the engineering adaptability analysis is carried out.The verification of the catenary system scheme and parameters are further advanced.Finally,the cross-section and tension combination of the 400 km/h catenary wire is proposed,and the key technical parameters of the 400 km/h catenary system are established.Research conclusions:(1)Increasing the working tension of the catenary wire can effectively improve the dynamic coupling performance of the pantograph-catenary system,and properly increasing the working tension of the catenary cable can effectively restrain the dynamic lifting of the positioning point and reduce the load of the droppers.(2)The better choice of working tension for the 400 km/h catenary system would be a contact wire with a cross-section of 150 mm^(2)(rated working tension 36 kN)and a catenary wire with a cross-section of 120 mm^(2)(working tension 28 kN).(3)The parameters of the 400 km/h catenary system formed in this paper such as pantograph-catenary current collection,suspension arrangement,equipment performance,construction and maintenance,have good engineering adaptability and implementability.(4)The research results can provide reference for the construction of high-speed railway projects in the field of rail transit.