scholarly journals The Nonlinear Behaviour of a Pantograph Current Collector Suspension

1999 ◽  
Author(s):  
L. Drugge ◽  
T. Larsson ◽  
A. Berghuvud ◽  
A. Stensson
Keyword(s):  
High Speed ◽  
Current Collector ◽  
System Response ◽  
Nonlinear Behaviour ◽  
High Speed Train ◽  
Nonlinear Characteristics ◽  
Catenary System ◽  
Parameter Values ◽  
Force Excitation ◽  
Dynamic Phenomena

Abstract The pantograph-catenary system is a critical component for trains required to run at higher speeds. The pantograph often includes nonlinear characteristics and the scope of this work is to investigate if nonlinear dynamic phenomena can occur in an existing design. A model of a pantograph suspension subsystem has been developed according to physical parameter values of the head suspension of the Schunk WBL88/X2 pantograph, providing electric power to the Swedish high-speed train X2. Studies of the system response for different force excitation show both harmonic, subharmonic and chaotic behaviour for the investigated parameter regions.

Active Control of a High-Speed Pantograph

1997 ◽  
Vol 119 (1) ◽  
pp. 1-4 ◽  
Author(s):  
D. N. O’Connor ◽  
S. D. Eppinger ◽  
W. P. Seering ◽  
D. N. Wormley
Keyword(s):  
Dynamic Model ◽  
Active Control ◽  
Contact Force ◽  
High Speed ◽  
High Speed Train ◽  
Single Measurement ◽  
Force Variation ◽  
Catenary System ◽  
And Performance ◽  
And Control

The design and performance of an active controller for a pantograph which collects current for a high-speed train are considered. A dynamic model of the pantograph/catenary system is described and control objectives are established. A design which incorporates a frame-actuated controller and requires only a single measurement is described. Over an array of train speeds, the contact force variation with the actively controlled pantograph is 50 percent less than for the equivalent passive pantograph system.

scholarly journals Research of interaction of the “train – bridge” system with bridge deck resonant vibrations

2018 ◽  
Vol 239 ◽  
pp. 05002 ◽  
Author(s):  
Leonid Diachenko ◽  
Andrey Benin ◽  
Anastasiia Diachenko
Keyword(s):  
High Speed ◽  
Bridge Deck ◽  
Critical Phenomenon ◽  
Resonance Mode ◽  
High Speed Train ◽  
Resonant Vibrations ◽  
High Speed Railway ◽  
Bridge Structures ◽  
Loose Parts ◽  
Dynamic Phenomena

When designing bridges on high-speed railways, special attention should be paid to ensuring the safety of train traffic and the comfort of passengers. On high-speed railways, the proportion of the length of bridge structures in the composition of the entire route is much larger than on conventional railways, which makes the present study relevant. In this paper based on numerical simulation, the results of the study of the motion of a high-speed train along bridge structures in the resonance mode of vibrations are presented. In this formulation, special attention was paid to the control of dynamic phenomena at the level of the “wheel-rail” contact. The dynamics of loose parts of the train car determines the magnitude of the contact force, which in turn characterizes the possible detachable movement of the wheel, which is inadmissible for the safety of the train. Analysis of the obtained results, using the example of a 50 m long simple span structure developed for the Moscow-Kazan high-speed railway, allows us to conclude that the resonant nature of the vibrations of simple beam is not a critical phenomenon.

A Laboratory Model Study of a Railway Current Collection System

2007 ◽  
Author(s):  
Lars Drugge ◽  
Anders Lennartsson ◽  
Annika Stensson Trigell
Keyword(s):  
High Speed ◽  
Dynamic Properties ◽  
Current Collector ◽  
Laboratory Model ◽  
Contact Wire ◽  
Current Collection ◽  
Model Study ◽  
Stiffness Variation ◽  
Curved Track ◽  
Catenary System

A vital system on modern high-speed electric trains is the overhead catenary system and the pantograph current collector. As speed limits are increased, train operators and railway engineers need measures of system performance in a number of situations. In this work a laboratory model is built to study the pantograph behaviour on curved track running on a catenary system with large stiffness variation. The model is designed to be simple, yet exhibit the most characteristic dynamic properties of the real system. Another objective is the possibility to run the pantograph at speeds near the wave propagation velocity of the contact wire. The situation of several trailing pantographs, with even spacing, which excites the system to steady state, is considered. Effects of changes in design features such as tension in the contact wire and torsion and translation stiffness of components in the pantograph are studied for different speeds. The interaction is complex and the performance depends on the dynamic properties of both the catenary system and the pantograph. The results show that the pantograph configuration mainly affects the size of amplitudes in the system while the contact wire tension influences at which velocities large amplitudes and contact losses occur.

scholarly journals Development of requirements for logic controls of the speed lines catenary system maintenance

2021 ◽  
Vol 2021 (4) ◽  
pp. 8-17
Author(s):  
Mokhirbek F. MUKHAMEDZHANOV ◽  
Keyword(s):  
High Speed ◽  
Practical Importance ◽  
Current Collector ◽  
Actual State ◽  
State Monitoring ◽  
Current Collection ◽  
Maintenance Schedule ◽  
Logic Control ◽  
Catenary System ◽  
System Life

Objective: To develop requirements for the organization of maintenance of the catenary system based on the actual state indicated by the digital diagnostic and monitoring platform in the logic control system for high-speed traffic. Methods: An overview analysis of high-speed catenary system diagnostics and monitoring systems is applied. Results: The systems of monitoring and automated control of catenary system devices in high-speed lines have been studied. The analytical findings as regards the maintenance methods according to the preventive maintenance schedule and based on the actual state monitoring data have been presented. Requirements for diagnostic and monitoring devices 15 of the high-speed lines catenary system have been formulated, aimed at improving the quality attributes of current collection. Practical importance: A structural diagram of quality diagnostics and monitoring for the current collection in the high-speed Current Collector–Catenary system was obtained. The design concept of a prin-cipal model of logic control of the catenary system life cycle has been developed

scholarly journals The Effect of High-Frequency Parametric Excitation on a Stochastically Driven Pantograph-Catenary System

2014 ◽  
Vol 2014 ◽  
pp. 1-8 ◽  
Author(s):  
R. H. Huan ◽  
W. Q. Zhu ◽  
F. Ma ◽  
Z. H. Liu
Keyword(s):  
Parametric Excitation ◽  
High Frequency ◽  
High Speed ◽  
Transition Probability ◽  
Kolmogorov Equation ◽  
System Response ◽  
Appreciable Effect ◽  
Transition Probability Density ◽  
Stationary Response ◽  
Catenary System

In high-speed electric trains, a pantograph is mounted on the roof of the train to collect power through contact with an overhead catenary wire. The effect of fast harmonic and parametric excitation on a stochastically driven pantograph-catenary system is studied in this paper. A single-degree-of-freedom model of the pantograph-catenary system is adopted, wherein the stiffness of the nonlinear spring has a time-varying component characterized by both low and high frequencies. Using perturbation and harmonic averaging, a Fokker-Planck-Kolmogorov equation governing the stationary response of the pantograph-catenary system is set up. Based on the transition probability density of the stationary response, it is found that even small high-frequency parametric excitation has an appreciable effect on the system response. Among other things, it shifts the resonant frequency and often changes the response characteristics markedly.

Sign in / Sign up

Export Citation Format

Share Document