A review of loading conditions for railway track structures due to train and track vertical interaction
01 Mar 2008-Structural Control & Health Monitoring (John Wiley & Sons, Ltd)-Vol. 15, Iss: 2, pp 207-234
TL;DR: In this paper, a review of the typical characteristics of the loading conditions for railway track structures, in particular, impact loads due to the wheel/rail interaction, is presented, with particular emphasis on the typical shapes of the impact load waveforms generally found on railway tracks.
Abstract: Train and track interactions during services normally generate substantial forces on railway tracks. Such forces are transient by nature and of relatively large magnitude and are referred to as impact loading. There has been no comprehensive review of the typical characteristics of the loading conditions for railway track structures, in particular, impact loads due to the wheel/rail interaction, published in the literature. This paper presents a review of basic design concepts for railway tracks, abnormalities on tracks, and a variety of typical dynamic impact loadings imparted by wheel/rail interaction and irregularities. The characteristics of typical impact loads due to wheel and rail irregularities, e.g. rail corrugation, wheel flats and shells, worn wheel and rail profiles, bad welds or joints, and track imperfections, are presented with particular emphasis on the typical shapes of the impact load waveforms generally found on railway tracks. Copyright © 2007 John Wiley & Sons, Ltd.
Citations
More filters
TL;DR: The fundamental principle "safety first" is still the key priority in most research today as mentioned in this paper, however, thanks to extensive interface with various customers, research and innovation in practices have shifted from optimizing functional purposes and targets through each stage of life cycle toward modernization, reliability, resilience, and better quality of life.
Abstract: Transportation and transit systems draw upon broad spectra of research fields due to the diversity and interconnectivity of transport modes, including road, rail, aviation, pipeline, maritime, or even aerospace. These systems have evolved over centuries to be considerably more efficient and environment-friendly for a wide range of customers. The fundamental principle "safety first" is still the key priority in most research today. However, thanks to extensive interface with various customers; research and innovation in practices have shifted from optimizing functional purposes and targets through each stage of life cycle toward modernization, reliability, resilience, and better quality of life. These initiatives additionally coincide with the grand challenges for engineering proposed by the National Academy of Engineering and the United Nations' Millennium Development Goals (National Academy of Engineering, 2015). Language: en
197 citations
Cites background from "A review of loading conditions for ..."
...These also respond to the need for routine maintenance and renewal of aging components within the transportation infrastructures, which are often required in order to assure safety and reliability of the systems (Remennikov and Kaewunruen, 2008)....
[...]
TL;DR: In this article, the effect of railway vibrations on passenger comfort and track performance is evaluated and the most suitable mathematical and numerical modelling strategies for railway vibration simulation, along with mitigation strategies are discussed.
187 citations
TL;DR: In this article, the track technical state can be assessed with the aid of axle box acceleration measurements, which can indicate short track defects like squats, welds with poor finishing quality, insulated joints, corrugation, etc.
153 citations
TL;DR: In this article, an automatic method for detecting railway surface defects called "squats" using axle box acceleration (ABA) measurements on trains is presented. But the method is based on a series of research results from their group in the field of railway engineering that includes numerical simulations, the design of the ABA prototype, real-life implementation, and extensive field tests.
Abstract: This paper presents an automatic method for detecting railway surface defects called “squats” using axle box acceleration (ABA) measurements on trains. The method is based on a series of research results from our group in the field of railway engineering that includes numerical simulations, the design of the ABA prototype, real-life implementation, and extensive field tests.We enhance the ABA signal by identifying the characteristic squat frequencies, using improved instrumentation for making measurements, and using advanced signal processing. The automatic detection algorithm for squats is based on wavelet spectrum analysis and determines the squat locations. The method was validated on the Groningen–Assen track in The Netherlands and accurately detected moderate and severe squats with a hit rate of 100%, with no false alarms. The methodology is also sensitive to small rail surface defects and enables the detection of squats at their earliest stage. The hit rate for small rail surface defects was 78%.
136 citations
TL;DR: In this paper, the authors discuss the problems associated with track stiffness, geometry degradation, and vibrations, and at the same time, studies the characteristics of elastic elements as well as the research carried out to test and evaluate their effectiveness.
127 citations
References
More filters
TL;DR: A review of dynamic modelling of railway track and of the interaction of vehicle and track at frequencies which are sufficiently high for the track's dynamic behaviour to be significant is presented in this paper.
Abstract: A review is presented of dynamic modelling of railway track and of the interaction of vehicle and track at frequencies which are sufficiently high for the track's dynamic behaviour to be significant. Since noise is one of the most important consequences of wheel/rail interaction at high frequencies, the maximum frequency of interest is about 5kHz: the limit of human hearing. The topic is reviewed both historically and in particular with reference to the application of modelling to the solution of practical problems. Good models of the rail, the sleeper and the wheelset are now available for the whole frequency range of interest. However, it is at present impossible to predict either the dynamic behaviour of the railpad and ballast or their long term behaviour. This is regarded as the most promising area for future research.
615 citations
Book•
01 Jan 1996
TL;DR: In this paper, a model of railway bridges is proposed for the classification of random stress-time history, and the assessment of steel railway bridges for fatigue and thermal interaction of long-welded rail with railway bridges.
Abstract: * Introduction * Theoretical bridge models * Modelling other factors * Modelling of railway bridges * Natural frequencies of railway bridges * Damping of railway bridges * Influence of vehicle speed on dynamics stress of bridges * Influence of track irregularities and other bridges * Traffic load on railway bridges * Statistical counting methods for the classification of random stress-time history * Stress ranges in steel railway bridges * The assessment of steel railway bridges for fatigue * Thermal interaction of long-welded rail with railway bridges
390 citations
TL;DR: In this article, two new dynamic models of railway track are presented, one continuous and the other incorporating the discrete mass of the sleepers, including the effect of the railpads which exist.
Abstract: Two new dynamic models of railway track are presented, one continuous and the other incorporating the discrete mass of the sleepers. These models include the effect of the railpads which exist betw...
359 citations
01 Jan 1993
TL;DR: Corrugation is a phenomenon which has excited the interest of railwaymen for more than a century, but for which there often does not appear to appear to be a cure as discussed by the authors.
Abstract: Corrugation is a phenomenon which has excited the interest of railwaymen for more than a century, but for which there often does not appear to be a cure. It has generally been realized that there a...
337 citations
TL;DR: In this article, the vertical dynamic behavior of a railway bogie moving on a rail is investigated for sleepers resting on an elastic foundation, and the transient interaction problem is numerically solved by use of an extended state-spacer vector approach in conjunction with a complex modal superposition for the track.
313 citations