Results 81 to 90 of about 129,371 (270)
Railway Engineering Science, 2020 To simulate ballast performance accurately and efficiently, the input in discrete element models should be carefully selected, including the contact model and applied particle shape. To study the effects of the contact model and applied particle shape on
Yunlong Guo +5 more
semanticscholar +1 more source
Enabling Under Ice Glider Operations: A Backseat Driver Approach
Journal of Field Robotics, EarlyView.ABSTRACT Polar Oceans are key locations for forcing global ocean circulation, influencing both global climate and biogeochemical cycles. Due to restricted access to these seasonally and perennially ice‐covered regions, these areas are severely undersampled.
Yaomei Wang +12 more
wiley +1 more source
Applied Rheology, 2015 An elasto-visco-plastic model of the Cauchy stress is proposed for gluing solution of railway ballast, with an asymptotic timedependent viscosity accounting for the anti-thixotropic and shear-thickening features.
Fang Chung +4 more
doaj +1 more source
Experimental and Numerical Investigation on Ballast Flight from Perspective of Individual Particles
Applied Sciences, 2019 Ballast flight significantly affects the safe operation of high-speed railway. A wind tunnel experiment and computational fluid dynamics simulation were performed to investigate the occurrence and development mechanism of ballast flight from the ...
Hao Yin, Liang Gao
doaj +1 more source
Development of Condition Assessment Index of Ballast Track Using Ground-Penetrating Radar (GPR)
Sensors, 2021 The condition of the ballast is a critical factor affecting the riding quality and the performance of a track. Fouled ballast can accelerate track irregularities, which results in frequent ballast maintenance requirements.
Fiseha Nega Birhane +2 more
doaj +1 more source
steel research international, EarlyView.Hydrochar‐mill‐scale briquettes with varying C/O molar ratios (0.07–0.90) have been tested at 1650 °C to evaluate their slag foaming performance for electric arc furnace application. All seven briquette recipes developed succeed in promoting slag foaming.
Yu‐Chiao Lu +3 more
wiley +1 more source
Field survey and evaluation method for fouled ballast using transmitted sound characteristics
Transportation EngineeringAs railway ballast crushing and refining progress with time, and the content of fine grains increases, the saturation of ballast increases during rainfall. The decrease in drainage and strength increase the likelihood for ballast to settle.
Takahisa Nakamura, Takahiro Kageyama
doaj +1 more source
Symmetrical angle switched single-phase and three-phase rectifiers: application to micro hydro power plants [PDF]
, 2019 Micro-size hydro power plants are commonly used at remote areas to supply islanded AC microgrids. A typical way to control grid frequency is to manipulate active power dissipated in ballast loads by AC/AC converters.
Bory Prevez, Henry +3 more
core
, 2020 The increase of train speed and axle load is an essential goal to make the railway transport more and more competitive for passengers and freights. On this basis, the unevenness of the railway track is crucial for the safety of the railway due to the ...
Joaquín J. Pons +3 more
semanticscholar +1 more source
Multi‐level fatigue reliability assessment of reinforced concrete railway bridges
Structural Concrete, EarlyView.Abstract This paper presents a multi‐level reliability framework for assessing the fatigue life of reinforced concrete (RC) railway trough bridges subjected to cyclic loading. The framework incorporates increasing levels of analytical complexity and real‐world data in four steps. First, an analytical model applies S–N curves and the Palmgren–Miner rule
Silvia Sarmiento +7 more
wiley +1 more source