Results 271 to 280 of about 31,742 (299)

The Effects of Track Stiffness on Track Performance

2019
Required stiffness value for a railway track must determined within the safety limits and it should reduce maintenance costs. While track must be stiff enough to conserve track’s geometric qualities, it must also provide sufficient flexibility in order to provide proper load distribution and avoid wear in track components. While determining this value,
BALCI, Erdem, BEZGİN, Niyazi
openaire   +1 more source

Fluctuations and Stiffness of Double-Stranded Polymers: Railway-Track Model

Europhysics Letters (EPL), 1995
Many biopolymers are double-stranded with a tight coupling between the filaments. We introduce a simple model to study the consequences. It consists of two worm-like chains coupled by harmonic springs between points of identical contour length and displays a novel behaviour: a stiffness larger on large than on small lengthscales.
Everaers, R., Bundschuh, R., Kremer, K.
openaire   +2 more sources

Track Stiffness Transition Zone Studied with Three-Dimensional Sandwich Track Model

Transportation Research Record: Journal of the Transportation Research Board, 2013
When railroad tracks pass from an earthen subgrade to a bridge, the tracks become uneven. In fact, even if the tracks are level at the time of construction, over time a dip develops. This phenomenon occurs just in front of the bridge and is a cause of greater maintenance and poor ride quality.
Hai Huang, Braun Brennecke
openaire   +1 more source

Continuous Tracking Control for a Compliant Actuator With Two-Stage Stiffness

IEEE Transactions on Automation Science and Engineering, 2018
Emerging applications of robots with direct physical interactions with humans have led to the development of a variety of series elastic actuators (SEAs) which are compliant, force controllable, and back drivable. The performance of current SEAs is mainly dependent on the specific stiffness of the spring. In our previous work, a compliant actuator with
Xiang Li 0009, Yongping Pan 0001, Gong Chen 0001, Haoyong Yu   +3 more
openaire   +1 more source

Relationship between track stiffness and dynamic performance of vehicle–track–bridge system

Vehicle System Dynamics, 2020
Track stiffness irregularity is superficially invisible on rail surface, while causes dynamical impact and track deformation when trains running through.
openaire   +1 more source

Influence of the Track's Stiffness Coefficient on the Acting Loads, Deflection and Dimensioning of Slab Track

Advanced Materials Research, 2011
Slab Track, as all railway structures, should provide secure train running and smooth passenger ride. Moreover, it should present sufficient vertical elasticity to distribute the loads to the adjacent fixing points of the rail. At the same time the deflection of the slab track should be comparable to that of the ballasted track which implies a decrease
openaire   +1 more source

Influence of Track Support Stiffness of Ballasted Track on Dynamic Wheel-Rail Forces

Journal of Transportation Engineering, 2013
AbstractDynamic wheel-rail force can be limited to high-frequency components owing to imperfections in the wheel-rail contact surface (P1) and may also contain low-frequency components owing to coupled wheel-rail vibrations in phase on the ballast (P2). Previous studies on dynamic wheel-rail forces have focused on the quality index of surface roughness
openaire   +1 more source

Effect of Substructure Characteristics of Slab Track on Track Stiffness

Journal of the Korean Society for Railway, 2019
In-Hyuk Baek, Seong-Hyeok Lee, Eung-Soo Shin, Dae-Wook Park   +3 more
openaire   +1 more source

A critical review on the vertical stiffness irregularity of railway ballasted track

Construction and Building Materials, 2023
Can Shi, Li Zhou, Xu Zhang
exaly  

Evaluating railway track stiffness using axle box accelerations: A digital twin approach

Mechanical Systems and Signal Processing, 2023
Chen Shen, Pan Zhang, Rolf Dollevoet
exaly