Damage to railway bridging

Statistical Modelling of Wear and Damage Trajectories of Railway Wheelsets

This paper discusses the use of Linear Mixed Models (LMM) and Generalized Linear Mixed Models (GLMM) to predict the wear and damage trajectories of railway wheelsets for a fleet of modern multiple unit trains. The wear trajectory is described by the evolution of the wheel flange thickness, the flange height and the tread diameter; whereas the damage trajectory is assessed through the probabilit...

Damage Assessment in Railway Sub-structures Deteriorated Using Ae Technique

Due to earthquakes, differential settlement and long-term weathering, civil structures have sustained deterioration. In super-structures located above ground, except for seriously damaged structures, evaluation of moderately or intermediately damaged structures is difficult. In sub-structures the damage would not be readily assessed even for severely damaged structures. AE testing has a potenti...

Introduction to railway communication

A Methodology to Prioritize the Construction Projects of New Railway Infrastructures for Privatization in Railway Networks (Case Study: Iran)

This study aims to develop a novel methodology to prioritize the construction of new railway infrastructures for privatization. The private sector can cooperate to solve the capacity problems of railway networks, by the construction of new infrastructure. The purpose of this study is to answer the basic question that whether the capacity problems of the railway networks can be solved simply by ...

Optimization Techniques Applied to Railway Systems

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 ...