Analysis of dynamic interaction between catenary and pantograph with experimental verification and performance evaluation in new high-speed line

Liu

IET Electrical Systems in Transportation

2019

To improve the current collection quality between pantograph and catenary, model of catenary-pantograph is established with the finite element simulation software MSC. Marc to calculate contact force between pantograph and catenary. Changes of contact force are discussed when the design parameters of catenary are changed. Interrelation between design parameter variation and contact force is analysed by introducing the method of Spearman rank correlation coefficient. Then, the sensitivity of the design parameters of catenary on contact force is analysed by introducing the method of Sobol sensitivity. Then, the variation of optimisation direction of design parameters of catenary and the influence of design parameters on contact force are analysed under different speeds. The results show the interrelation between design parameter variation and the contact force, and the sensitivity of parameter is different when the pantograph runs at the different speeds. Finally, the optimisation method of catenary parameters is proposed, and the current collection quality between pantograph and catenary is obviously improved by increasing the contact wire tension, reducing the contact wire linear density and messenger wire tension when the speed is 500 km/h.

Section: Introductionmentioning

confidence: 99%

Sensitivity analysis and research on optimisation methods of design parameters of high‐speed railway catenary

Liu

IET Electrical Systems in Transportation

2019

Proceedings of the Institution of Mechanical Engineers, Part F:

“…Recently, with the increase of train speed, the interaction between the pantograph and catenary has been of great interest to many scholars. To obtain the accurate initial configuration of a catenary, a solution method for the static equilibrium state of a three-dimensional (3D) catenary was proposed by Tur et al 2 To improve the accuracy of the pantographcatenary model, the geometrical non-linearity of messenger/contact wire was considered based on absolute nodal coordinate formulation [3][4][5] as well as the explicit formulations of non-linear cable and truss elements. 6 A real-time catenary model for hardware-in-the-loop simulation was established by Facchinetti et al 7 To improve the current collection quality of a pantograph-catenary system, a new tension class for an existing catenary was proposed by Na˚vik et al 8 The interval of double pantographs was optimized by Liu et al 9 An optimization method was proposed based on the redesign of the pantograph head suspension characteristics by Pombo and Ambro´sio.…”

Section: Introductionmentioning

confidence: 99%

Analysis of the galloping behaviour of an electrified railway overhead contact line using the non-linear finite element method

Song

Liu

Wang

et al. 2018

Galloping of an electrified railway overhead contact line (also known as catenary galloping) is a large-amplitude windinduced vibration under extreme conditions that is extremely detrimental to the railway infrastructure. This paper attempts to conduct a numerical simulation of catenary galloping and analyse its galloping behaviour. Computational fluid dynamics is utilized to calculate the aerodynamic coefficients of the contact wire with different classes of wear. The mechanism of catenary galloping is revealed by the Den Hartog theory. To describe the non-linear behaviour of catenary galloping, a nonlinear finite element method is employed to establish the catenary model, which properly considers the geometrical nonlinearity of the contact/messenger wire and the non-smooth non-linearity of droppers. Considering the effect of fluidinduced vibration, the self-excited forces acting on the contact wire are derived. Through several numerical examples, the galloping responses of the catenary are analysed with different tension classes and stochastic wind. The results demonstrate that the extreme wear of the contact wire caused by the long-term passage of pantograph can change the aerodynamic coefficients of the cross-sections of the contact wire and cause the system's instability under steady wind load. It is concluded that upgrading the catenary tension class can effectively suppress catenary galloping. The stochastic wind only has small effect on the catenary galloping. The stochastic wind only has small effect on the catenary galloping.

MATEC Web of Conferences

“…The objective of dynamic simulation is to determine the time-related behaviour of all pantograph assembly and analysis of interactions between particular parts (links) in connecting joints [3,4]. The dynamic simulation is useful to determine the contact force acting by the collector strips on the contact wire.…”

Section: Introductionmentioning

confidence: 99%

Novel analysis methods of dynamic properties for vehicle pantographs

Wilk

2018

Transmission of electrical energy from a catenary system to traction units must be safe and reliable especially for high speed trains. Modern pantographs have to meet these requirements. Pantographs are subjected to several forces acting on their structural elements. These forces come from pantograph drive, inertia forces, aerodynamic effects, vibration of traction units etc. Modern approach to static and dynamic analysis should take into account: mass distribution of particular parts, physical properties of used materials, kinematic joints character at mechanical nodes, nonlinear parameters of kinematic joints, defining different parametric waveforms of forces and torques, and numerical dynamic simulation coupled with FEM calculations. In this work methods for the formulation of the governing equations of motion are presented. Some of these methods are more suitable for automated computer implementation. The novel computer methods recommended for static and dynamic analysis of pantographs are presented. Possibilities of dynamic analysis using CAD and CAE computer software are described. Original results are also presented. Conclusions related to dynamic properties of pantographs are included. Chapter 2 presents the methods used for formulation of the equation of pantograph motion. Chapter 3 is devoted to modelling of forces in multibody systems. In chapter 4 the selected computer tools for dynamic analysis are described. Chapter 5 shows the possibility of FEM analysis coupled with dynamic simulation. In chapter 6 the summary of this work is presented.