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Influence of Track Stiffness Distribution on Vehicle and Track Interactions in Track Transition

Proceedings of the Institution of Mechanical Engineers, Part F: Journal of Rail and Rapid Transit, 2010
A model for dynamic analysis of the vehicle-track-subgrade coupling system was developed by utilizing the finite-element method. Based on the model, new types of vehicle and track elements are presented and their associated stiffness matrix, mass matrix, and damping matrix are formulated. Computational software is coded with Matlab.
X Lei, B Zhang
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Track deflection and stiffness measurements from a track recording car

Proceedings of the Institution of Mechanical Engineers, Part F: Journal of Rail and Rapid Transit, 2014
A new innovative method for track deflection and track stiffness measurement is described and used on the iron-ore line in Sweden. The method uses two different measurement systems of longitudinal level on one axle, and by comparing them in a new way it is possible to extract the unloaded level and the effect of the loading from the loaded longitudinal
Eric G Berggren, Arne Nissen, Björn S Paulsson   +2 more
exaly   +2 more sources

High speed and track deterioration: The role of vertical stiffness of the track

Proceedings of the Institution of Mechanical Engineers, Part F: Journal of Rail and Rapid Transit, 2004
The aims of this article are as follows. Firstly, the importance of vertical track stiffness on high-speed lines is emphasized. Secondly, it proposes an optimum range for this vertical stiffness value, establishing parallel equations that enable the influence of every elastic component located under the rail to be quantified (base plates, ballast and ...
Paulo Fonseca Teixeira, Francesc Robuste   +1 more
exaly   +2 more sources

Importance of Bending Stiffness of Different Track Forms

, 2021
The most common form of railway track construction is still discrete sleepers on ballast. However, other types of track, sometimes referred to as ballastless, hybrid and/or slab track, may in some circumstances be more cost effective over their life cycle despite their higher initial cost.
Toshan Rampat, Louis Le Pen, William Powrie, John Harkness   +3 more
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Vibrations of a track caused by variation of the foundation stiffness [PDF]

Probabilistic Engineering Mechanics, 2003
Abstract The paper deals with the stochastic analysis of a single-degree-of-freedom vehicle moving at constant velocity along a simple track structure with randomly varying support stiffness. The track is modelled as an infinite Bernoulli–Euler beam resting on a Kelvin foundation, which has been modified by the introduction of a shear layer.
Andersen, Lars, Nielsen, Søren R. K.
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Degradation of railway track geometry – Correlation between track stiffness gradient and differential settlement

Proceedings of the Institution of Mechanical Engineers, Part F: Journal of Rail and Rapid Transit, 2020
Based on the track geometry car recordings performed from 1999 to 2016 on a section of the Swedish heavy haul line Malmbanan, the vertical track geometry degradation is analysed for wavelengths in the interval 1–25 m.
Jens C O Nielsen
exaly   +2 more sources

Evaluation of track stiffness and track damping

Journal of Sound and Vibration, 1984
Abstract Correct estimation of track stiffness and track damping is essential for predicting the dynamic wheel loads of railway vehicles running on rough tracks. While several analytical procedures have been developed in the past to estimate track stiffness, there is no procedure readily available for estimating track damping. Experimental techniques
V.V. Singh, D. Deepak
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Time-varying stiffness tracking control of knee exoskeleton

2017 IEEE International Conference on Robotics and Biomimetics (ROBIO), 2017
To guarantee flexibility and safety of robots is important for contact interaction with external environment and force transmission among internal actuation systems. Compliance control has become the key issue for robotic systems (e.g., exoskeletons) to achieve such characteristics.
Wenhao Ma, Hong Cheng 0002, Zhan Li 0002, Jing Qiu 0004   +3 more
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Prescribed Performance Tracking of a Variable Stiffness Actuated Robot

IEEE Transactions on Control Systems Technology, 2015
This paper is concerned with the design of a state feedback control scheme for variable stiffness actuated (VSA) robots, which guarantees prescribed performance of the tracking errors despite the low range of mechanical stiffness. The controller does not assume knowledge of the actual system dynamics nor does it utilize approximating structures (e.g ...
Efi Psomopoulou, Achilles Theodorakopoulos, Zoe Doulgeri, George A. Rovithakis   +3 more
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The Influence of Track Stiffness Distribution on Dynamic Behavior of Track Transition

2011 Joint Rail Conference, 2011
A model for dynamic analysis of the track stiffness distribution on the impact of track transition is developed with vehicle element and track element. The vehicle element model has a total of 26 DOFs, in which 10 DOFs are used to describe the vertical movement of the car body, and 16 DOFs are associated with the rail displacements.
Xiaoyan Lei, Bin Zhang
openaire   +1 more source