Results 21 to 30 of about 99,009 (221)
Analysis of a typical railway turnout sleeper system using grillage beam analogy [PDF]
, 2012 A simplified grillage beam analogy was performed to investigate the behaviour of railway turnout sleeper system with a low value of elastic modulus on different support moduli.
Aravinthan, Thiru +3 more
core +1 more source
Applied Sciences, 2017 Transition zones in railway tracks are the locations with considerable changes in vertical support structures, e.g., near bridges. Due to possible water flow constrictions in transition zone structures, there is frequently an increased moisture level in ...
Haoyu Wang +3 more
doaj +1 more source
Ballast bed resistance characteristics based on discrete-element modeling
Advances in Mechanical Engineering, 2018 In this study, in situ experiments were conducted to study the changing characteristics of the lateral and longitudinal resistance of a ballast bed, and a three-dimensional model for the ballast bed and sleeper was constructed based on the discrete ...
Zhiping Zeng +5 more
doaj +1 more source
Analysis of mesoscopic mechanical dynamic characteristics of ballast bed with under sleeper pads
Railway Engineering Science, 2023 The meso-dynamical behaviour of a high-speed rail ballast bed with under sleeper pads (USPs) was studied. The geometrically irregular refined discrete element model of the ballast particles was constructed using 3D scanning techniques, and the 3D dynamic
Xiong Yang +5 more
doaj +1 more source
Journal of Marine Science and EngineeringBallast water management systems (BWMSs) using active substances (AS) have been subjected to land-based tests with artificially increased dissolved organic matter (DOM) and cultured species according to the International Maritime Organization G9 ...
Hyung-Gon Cha +6 more
doaj +1 more source
High frequency electronic ballast provides line frequency lamp current [PDF]
, 2001 Most electronic ballasts for fluorescent lamps provide a sinusoidal lamp current at the switching frequency. The high-frequency current flowing through the lamp can generate significant radiated noise, which is unacceptable in noise-sensitive ...
Santi, Enrico +2 more
core +1 more source
Use of Geogrids and Recycled Rubber in Railroad Infrastructure for Enhanced Performance
Geosciences, 2019 Railway tracks are conventionally built on compacted ballast and structural fill layers placed above the natural (subgrade) foundation. However, during train operations, track deteriorations occur progressively due to ballast degradation.
Buddhima Indraratna +6 more
doaj +1 more source
Mid-ocean exchange of container vessel ballast water. 1: seasonal factors affecting the transport of harmful diatoms and dinoflagellates [PDF]
, 1999 Our study of 34 ships (20 direct from Oakland, California, USA, and 14 more after open ocean exchange) is the first year-long seasonal study to assess the effectiveness of open ocean exchange of ballast waters.
Dickman, MD, Zhang, FZ
core +1 more source
Agraarteadus, 2019 The correct selection of the level of mechanical ballasting for wheeled tractors is among the most important issues for increasing their utilisation efficiency, in particular, increasing their grip properties.
Volodymyr Bulgakov +5 more
doaj +1 more source
Shear resistance improvement of oil-contaminated ballast layer with rubber shred inclusions [PDF]
, 2016 Railway ballast, which form an integral part of rail tracks, is highly susceptible to subsistence due to both vibration transmitted by the passing trains, as well as the breakage of ballasts with repeated impact.
Chan, Chee Ming +1 more
core