【作者】 李静；

【导师】 张卫华；

【作者基本信息】 西南交通大学 ， 载运工具运用工程， 2021， 硕士

【摘要】 随着我国铁路线路的不断完善,线路提速也逐渐被人们关注。接触网供电系统是铁路系统中的关键之一,为适应列车提速,线路上相应的接触网供电系统需要进行调整或改变。在接触网供电系统中,刚性接触网的应用前景较广泛,有结构简单、占用空间少、施工方便、安全可靠和国产化程度高等诸多优点,隧道中刚性接触网系统的设计会对列车运行的稳定性和安全性产生影响。因此,若要满足列车提速的条件,隧道线路中可以考虑采用与之匹配的刚性悬挂接触网方案。本文基于刚性接触网的基本结构,开展了时速200 km/h刚性接触网受流技术的研究。主要包括以下内容:(1)利用有限元法建立出刚性悬挂接触网模型和考虑弓头形貌的三质量块受电弓模型,耦合后构建了受电弓-接触网系统动力学模型,并通过与实测线路数据及相关标准中的弓网接触力、接触点抬升位移、弓头振动加速度等动态特性进行对比,验证了模型的正确性。(2)基于弓网耦合模型,详细研究了适合时速200 km/h下的刚性悬挂接触网的结构参数,包括定位装置选型、刚性网跨距分析、定位点刚度的选取,进一步分析了刚性悬挂接触网的结构参数对弓网动态特性的影响。(3)从弓网动力学性能、磨耗性能、拉出值波形数目等方面考虑了拉出值布置方式对刚性接触网动态性能的影响,通过时域上的接触力时间历程曲线及其特征值等对弓网受流质量进行评判,利用相关函数算法观察谱曲线,进一步判断不同拉出值布置方式的受流质量,以及提取刚性接触网相关信息,并结合机械磨耗对碳滑板的影响提出了优化后的拉出值交叉布置方案。(4)本文基于正交试验设计方法对适应列车高速运行的锚段关节进行了参数设计研究,通过正交试验中的直观分析法和方差分析法获取最优组合参数,在优组合参数的基础上对锚段关节横向间距进行了进一步研究。此外,研究了特殊区段中刚性分段绝缘器的选型和降低质量对弓网动态性能的影响,刚柔过渡段中关节式过渡和贯通式过渡在时速160 km/h、200 km/h的适应性,并对过渡处长度和导高差等参数进行优化。受电弓选型中确定了DSA250型受电弓下的弓网受流质量更好。更多还原

【Abstract】 With the continuous improvement of China’s railway lines,the line speed is gradually concerned by people.The catenary power supply system is one of the key points in the railway system.In order to adapt to the train speed increase,the corresponding catenary power supply system on the line needs to be adjusted or changed.The rigid catenary has a wide application prospect,which has many advantages,such as simple structure,less occupied space,convenient construction,safe and reliable,and high degree of localization.The design of the rigid catenary system in the tunnel will have an impact on the stability and safety of train operation.Therefore,in order to meet the conditions of train speed increase,the rigid suspension catenary scheme matching with it can be considered in the tunnel line.Based on the basic structure of rigid catenary,the current collection technology of 200 km/h rigid catenary is studied in this paper.It mainly includes the following contents:a)The rigid suspension catenary model and the three mass pantograph model considering the shape of collector head are established by using the finite element method.After coupling,the dynamic model of pantograph catenary system is constructed,and the dynamic characteristics such as pantograph catenary contact force,lifting displacement of contact point and vibration acceleration of collector head are compared with the measured line data and relevant standards.The model is verified to be correct.b)Based on the pantograph catenary coupling model,the structural parameters of rigid suspension catenary suitable for 200 km/h are studied in detail,including positioning device selection,rigid catenary span analysis and positioning point stiffness selection,and the influence of structural parameters of rigid suspension catenary on the dynamic characteristics of pantograph catenary is further analyzed.c)From the aspects of pantograph catenary dynamic performance,wear performance and the number of stagger waveforms,the influence of stagger layout on the dynamic performance of rigid catenary is considered.The quality of pantograph catenary current collection is evaluated by the time history curve of contact force and its eigenvalue in time domain.The correlation function algorithm is used to observe the spectrum curve,to further judge the current collection quality of different pull-out value arrangements,and to extract the relevant information of rigid catenary.Combined with the influence of mechanical wear on carbon slide plate,the optimized cross layout scheme of stagger is put forward.d)Based on the orthogonal experimental design method,this thesis studies the parameter design of overlapping section which is suitable for high-speed train operation,obtains the optimal combination parameters through the intuitive analysis method and variance analysis method in the orthogonal experiment,and further studies the transverse spacing of overlapping section on the basis of the optimal combination parameters.In addition,the selection of rigid section insulator and the influence of reduced mass on the dynamic performance of pantograph catenary in special section are studied.The adaptability of the overlap transition and through transition in rigid flexible transition section at speeds of 160 km/h and 200 km/h is studied.The length and height difference of transition section are optimized.In the selection of pantograph,the current collection quality of DSA250 is better.更多还原