In modern rail-rail transshipment yards huge gantry cranes spanning all railway tracks allow for an e cient transshipment of containers between di erent freight trains. This way, multiple trains loaded with cargo for varying destinations can be consolidated to a reduced number of homogeneous trains, which is an essential requirement of hub-and-spoke railway systems. An important problem during ...

The problem that we study in this Master thesis is the energy minimization of railway systems, where the objective is to find the optimal speed profiles that minimize the consumption of a given journey. We first develop a model that takes into account all the constraints that the problem presents unlike in existing works. Given the difficulty of the problem an analytical solution is beyond our ...

Electric railway traction chains (ERTCs) emerged at the end of the nineteenth century. Over the years, they have been consolidated as a better solution than their counterparts, i.e., the traction systems with generating power on board (e.g., diesel or steam-based systems). In terms of performances, ERTCs show the highest power-to-weight ratio, fastest acceleration and highest traction effort on...

In recent years, new diagnosis systems for railway infrastructure have been developed and launched into market. Their major objective is to increase the availability of railway infrastructure and its external systems by means of preventive maintenance, anticipating malfunctions and failures. The acquisition and installation of such systems comprises the investment of large amounts of money. In ...

Resilience and the efficiency of transportation systems are crucial for economic development geographical areas, network analysis applied to railways can provide insight into importance branch lines their impacts on entire system. This paper explores behavior ERC measure, a local robustness railway in Lombardy, Italy, analyzes deactivating stations or journeys network’s robustness. Changes topo...

The main design criteria of ballasted railway tracks include rail deflections, rail bending stresses, rail wheel contact stresses, sleeper bending moments and ballast sleeper contact pressures. Numerous criteria have been defined for the design of ballasted railway tracks owing to the various mechanical properties of track components and their complex interaction. Therefore, railway track desig...

In this paper, a semi-active control system for vibration mitigation of railway bridges is presented. The real time frequency response is estimated using a short-time Fourier transform, employing curve fitting to relevant peaks for increased accuracy. A control algorithm developed in MATLAB® is linked to a commercial FE-software, facilitating application on arbitrary structures. A numerical stu...

Txomin Nieva a, b, , Andreas Fabri , Abdenbi Benammour a a Institute for computer Communications and Applications (ICA) Communication Systems Dept. (DSC) Swiss Federal Institute of Technology (EPFL) CH-1015 Lausanne, Switzerland http://icawww.epfl.ch {txomin.nieva, abdenbi.benammour}@epfl.ch b Industrial Software Systems CHCRC.C2 Information Technologies Dept. ABB Corporate Research Ltd. CH-540...