RD
Authored
10 records found
Rail wear rate on the Belgian railway network
A big-data analysis
This paper presents a big data-based analysis of the rail wear of the whole Belgian railway network measured in 2012 and 2019. Wear rates are reported, discussed, and quantitatively formulated as functions of critical factors in terms of curve radius, annual tonnage (rail age), h
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A multiple spiking neural network architecture based on fuzzy intervals for anomaly detection
A case study of rail defects
In this paper, a fuzzy interval-based method is proposed for solving the problem of rail defect detection relying on an on-board measurement system and a multiple spiking neural network architecture. Instead of outputting binary values (defect or not defect), all data will belong
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Monitoring Line-Infrastructure With Multisensor SAR Interferometry
Products and Performance Assessment Metrics
Satellite radar interferometry (InSAR) is an emerging technique to monitor the stability and health of line-infrastructure assets, such as railways, dams, and pipelines. However, InSAR is an opportunistic approach as the location and occurrence of its measurements (coherent scatt
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Ground vibration induced by high speed trains on an embankment with pile-board foundation
Modelling and validation with in situ tests
To investigate the train-induced ground vibration, an explicit time-domain, three dimensional (3D) finite element (FE) model is developed. The train, track, embankment, pile-board structure and nearby ground soils are all fully coupled in this model. The complex geometries involv
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Mechanism of short pitch rail corrugation
Initial excitation and frequency selection for consistent initiation and growth
This paper proposes a new hypothesis for the formation process of short pitch rail corrugation. An FE wheel-track dynamic model is utilized to verify the hypothesis by reproducing corrugation initiation and consistent growth. It is found longitudinal compression modes are respons
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Evaluating railway track stiffness using axle box accelerations
A digital twin approach
While various train-borne techniques have been developed for measuring railway track stiffness, differentiating stiffness at different track layers remains a challenge. This study proposes a digital twin framework for the vehicle–track interaction system, which enables track stif
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Smart technology solutions for the NeTIRail-INFRA case study lines
Axle box acceleration and ultra-low cost smartphones
In this paper, we present preliminary results on the development of smart technology solutions for lower density railway lines. The goal is to reach a cost effective inspection and asset management to minimize maintenance
interventions time/cost without dedicated inspection vehic
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A condition-based maintenance methodology for rails in regional railway networks using evolutionary multiobjective optimization
Case study line Braşov to Zărneşti in Romania
In this paper, we propose a methodology based on signal processing and evolutionary multiobjective optimization to facilitate the maintenance decision making of infra-managers in regional railways. Using a train in operation (with passengers onboard), we capture the condition of
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Pre-cracking development of weld-induced squats due to plastic deformation
Five-year field monitoring and numerical analysis
Weld-induced squats are a major damage type in high-speed railways as well as in conventional railways. They incur high maintenance costs and endanger operational safety. This paper first presents and analyzes five-year continual field monitoring observations and measurements of
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Rail degradation due to thermite weld discontinuities
Field experience
This paper details the field-testing approach and results of thermite welds used in railway applications. Rail steels made from R260 grades are welded by two different processes: the standard process according to the European standards, and a recent technology. Welds are introduc
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Contributed
10 records found
Predicting track quality using structural elements and relative track geometry data measured by RILA
A Machine Learning Classification approach
Track quality measures differ from standard to standard. Widely used indices for track quality are the standard deviations of the rail longitudinal level data and the standard deviations of alignment data. Researchers have opted for various learning methods as to relate track qua
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Vibration-based railway track condition monitoring
A physics-based digital twin approach
This thesis transforms the way we understand and monitor rail infrastructure with a digital twin that merges measurement data and physics-based models to deliver instant insights. This thesis will be of particular interest to professionals in the rail industry seeking to answer t
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Horizontal deformation of the High Speed Rail track
A study into the horizontal deformation of a sand embankment on asymmetrical soft soil for a hight speed rail track - case study HSL Rijpwetering
The high speed rail line in the Netherlands, constructed since 2002, is built to create a fast travel connection from Amsterdam to Rotterdam and the Belgium border. The track is designed for trains with a maximum operating train speed of 300 km/h. A great part of the structure is
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De statische wissel
De wissel die nooit faalt
Dit rapport behandelt een wissel die geen bewegende delen bezit en hierdoor geen controle circuit nodig heeft. Het rapport bezit een analyse van verschillende bestaande wissels en wisselconcepten, beide in hoofdspoor en tramspoor, om een evaluatie te geven van elk concept. Op dez
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Dynamic behaviour of slab track on pile foundation
Analysis method based on dynamic behaviour of a high-speed slab track and settlements in the substructure
In this master thesis the behaviour of a high speed railway track constructed on top of a pile foundation with settlements under a dynamic load has been analysed. Therefore, a model was developed in the software program DARTS, dynamic analysis of rail track structures. In DARTS t
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Plastic railway sleepers
Creating a finite element model for hybrid plastic railway sleepers
Railway sleepers form an important part of a classic track structure. Sleepers exists in their current form for a long time. The transition from wood to concrete sleeper has been made, but wood is still used and present in many track sections. As creosoted wooden sleepers are not
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Development of Condition Monitoring System for Railway Crossings
Condition Assessment and Degradation Detection for Guided Maintenance
Railway crossings are essential components of the railway track system that allow trains to switch from one track to another. Due to the complex wheel-rail interaction in the crossing panel, crossings are vulnerable elements of railway infrastructure and usually have short servic
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Long-Term Behaviour of Railway Crossings
Wheel-Rail Interaction and Rail Fatigue Life Prediction
Railway turnouts are important components of railway infrastructure as they provide flexibility and guidance to the rail traffic. Because of geometrical discontinuities in the crossing area of the turnouts, high impact forces due to passing wheels acting on the crossing nose can
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Wheel-Rail Interaction
Enhanced explicit finite element modelling, verification and validation
Nowadays, wheel-rail (W/R) interfaces are suffering from the practical problems (e.g. wear, rolling contact defects) with the increase of train speed and traffic density. For accurate prediction of wear and/or growth of rolling contact defects, rapid determination of detailed con
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Trust unravelled
In inter-organisational relationships in a regulated tender environment
Scientists say that trust in inter-organisational relationships leads to high performance, project success, and better quality in construction work. Later research shows that distrust also plays an important role in preventing excessive trust in relationships. It is better to say
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