Influence of contact wire pre-sag on the dynamics of pantograph–railway catenary

Cho, Yong Hyeon; Lee, Ki-Won; Park, Young; Kang, Bu-Byoung; Kim, Ki-nam

doi:10.1016/j.ijmecsci.2010.04.002

Cited by 90 publications

(59 citation statements)

References 20 publications

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“…Ambrósio and Pombo [19][20][21][22][23][24][25][26][27] establish the catenary model by this method and study the pantographcatenary interaction in combination with a pantograph. Simultaneously, Cho et al [28,29] establish the catenary model through this method and study the effect of the contact wire sag and nonlinear droppers on the pantograph-catenary behavior by introducing a pantograph model. Stichel et al [30,31] construct the catenary model and analyze its interaction with multiple pantographs.…”

Section: Finite Element Modelmentioning

confidence: 99%

Advances of research on high-speed railway catenary

Liu

Song

et al. 2017

J. Mod. Transport.

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The interaction between the catenary and pantograph is one of the most crucial factors that determine the train operation in high-speed railway. The bad state of catenary is able to directly influence the power supply safety of traction power system. In this paper, four aspects on the catenary research of high-speed railway are reviewed in detail, namely the solution methods for catenary equilibrium state, the dynamic modeling methods of catenary, non-contact detection methods of catenary, and the static and dynamic evaluation methods of catenary. In addition, their recent advances are described. For the low solution accuracy of the initial equilibrium state of catenary, the structure finding method with multi-objective constraint and nonlinear finite element procedure are introduced to solve the problem. For the catenary's dynamic modeling, considering the influence of environmental wind on the catenary, environmental wind simulations and wind tunnel tests are used to obtain the aerodynamic coefficients and build the wind field along the catenary for analysis of its wind vibration characteristics. In order to improve the detection accuracy of non-contact detection for the catenary, the deep learning theory and real-time detection algorithms should be adopted in the future. In view of the lack of dynamic assessment method for the catenary, the modern spectrum evaluation, timefrequency analysis, big data technology and their combinations will be the important means for future catenary evaluation.Keywords High-speed railway Á Modeling of catenary Á Simulation of catenary Á Detection of catenary Á Evaluation of catenary

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Section: Finite Element Modelmentioning

confidence: 99%

Advances of research on high-speed railway catenary

Liu

Song

et al. 2017

J. Mod. Transport.

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“…As a result, Eq. (4) can be linearized, which permits a very simple approach [3][4][5][6][7]. As the train speed increases, the vertical displacement x also increases, and Eq.…”

Section: Modeling Of Carbon-strip Suspensionmentioning

confidence: 99%

“…Wu and Brennan [1,2] conducted an analytical study of the pantograph motion using a linear single-degree-of-freedom model. In other studies, a linear mass-spring-damper model with three degrees of freedom was used [3][4][5][6][7]. As train speed increases, the effects of nonlinearity become significant due to larger pantograph displacements [8].…”

Section: Introductionmentioning

confidence: 99%

Vertical dynamics of a pantograph carbon-strip suspension under stochastic contact-force excitation

2013

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In electric trains, a pantograph is mounted on the roof of the train to collect power through contact with an overhead catenary wire. The carbon-strip suspension of a pantograph, along which contact with the catenary occurs, is subjected to harmonic and stochastic contact-force excitations. In this paper, vertical dynamics of the carbon-strip suspension is studied with an aim of improving the reliability and safety of running trains. A single-degree-of-freedom model of the carbon-strip suspension with nonlinear stiffness is developed using parameter values of the DSA X pantograph. Through stochastic averaging, a FokkerPlanck-Kolmogorov equation governing the stationary response of the carbon-strip suspension is set up. Based on the transition probability density of the stationary response, it is found that random jumps and bifurcations in the carbon-strip motion can occur. The possibility of motion bifurcations and the frequency of random jumps warrant consideration in advanced design of carbon-strip suspensions.

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“…Commercial software was used to establish the finite element model of the pantograph-catenary system and to simulate its dynamic behavior [19,20]. Cho et al [21] presented a modified SDOF dynamic system with a time-varying stiffness to include the pre-sag's effect on the dynamic interaction of the pantograph-catenary. To obtain more realistic simulation results, an advanced 3D model for studying and simulating the pantograph-catenary system was established by Benet et al [22].…”

Section: Introductionmentioning

confidence: 99%

A Numerical Method Based on the Parametric Variational Principle for Simulating the Dynamic Behavior of the Pantograph‐Catenary System

Gao

Zhong

2018

Shock and Vibration

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Based on the finite element method (FEM), the parametric variational principle (PVP) is combined with a numerical time-domain integral method to simulate the dynamic behavior of the pantograph-catenary system. Based on PVP, formulations for the nonlinear droppers in the catenary and for the contact between the pantograph and the contact wire are proposed. The formulations can accurately determine the tension state or compression state of the nonlinear droppers and the contact state between the pantograph and the contact wire. Based on the periodicity of the catenary and the precise integration method (PIM), a numerical timeintegration method is developed for the dynamic responses of the catenary. For this method, the matrix exponential of only one unit cell of the catenary is computed, which greatly improves the computational efficiency. Moreover, the validation shows that the formulations can compute the contact force accurately and represent the nonlinearity of the droppers, which demonstrates the accuracy and reliability of the proposed method. Finally, the dynamic behaviors of the pantograph-catenary system with different types of catenaries are simulated.

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Influence of contact wire pre-sag on the dynamics of pantograph–railway catenary

Cited by 90 publications

References 20 publications

Advances of research on high-speed railway catenary

Advances of research on high-speed railway catenary

Vertical dynamics of a pantograph carbon-strip suspension under stochastic contact-force excitation

A Numerical Method Based on the Parametric Variational Principle for Simulating the Dynamic Behavior of the Pantograph‐Catenary System

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