Monitoring bolt tightness of rail joints using axle box acceleration measurements

Oregui, M.; Li, S.; Núñez, Alfredo; Li, Zili; Carroll, R.; Dollevoet, Rolf

doi:10.1002/stc.1848

Cited by 57 publications

(47 citation statements)

References 26 publications

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“…11. The major high-frequency content is around 1.1 kHz, which agrees with the high-frequency ranges obtained for the real track [59], where measurements of similar cases were presented. These findings confirm that the setup is able to represent high-frequency dynamic characteristics of the wheel-rail contact system.…”

Section: Fe Modelling and Experiments Of The Rail Jointsupporting

confidence: 88%

Development of a New Downscale Setup for Wheel-Rail Contact Experiments under Impact Loading Conditions

Naeimi

Petrov

et al. 2017

Exp Tech

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A new downscale test rig is developed for investigating the contact between the wheel and rail under impact-like loading conditions. This paper presents the development process of the setup, including review and synthesis of the potential experimental techniques, followed by scalability, mechanical and operational analysis of the new setup. The new test rig intends to remedy the lack of dynamic similarity between the actual railway and the existing laboratory testing capability, by taking into account the factors that contribute to high-frequency dynamics of the wheel-track system. The paper first reviews the functionalities of the existing test techniques in the literature. Based on this survey, the category of the scaled wheel on the rail track ring is chosen. Afterwards, three potential alternatives are identified under the chosen category and the optimum mechanism is achieved through finite element modelling and analysis of the structures. A downscale test rig, consisting of multiple wheel components running over a horizontal rail track ring, effectively fulfilled the requirements needed for analogical testing of the wheel-rail contact behaviour. The new test rig is a unique experimental setup due to the involvement of high-frequency dynamic vibrations in the wheel-track system and analogy of the incorporated elements and loading to those of the real-life system. This paper further presents the results of some real experiments carried out using the newly-built setup to support substantial ideas behind its development.

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Section: Fe Modelling and Experiments Of The Rail Jointsupporting

confidence: 88%

Development of a New Downscale Setup for Wheel-Rail Contact Experiments under Impact Loading Conditions

Naeimi

Petrov

et al. 2017

Exp Tech

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“…These include the change in stiffness of rail pads and fatigue damage of the fastening system [1], the location of the rail weld between the adjacent sleepers [27], existence of track lateral irregularity [28], noise from braking pads, and damage appearance due to an increase in total train mass, etc.…”

Section: Qualitative Analysis On the Effectiveness Of The Modelmentioning

confidence: 99%

“…On a traditional railway track, a fishplate and bolt, as shown in Figure 1, are used to join rails [1]. The large dynamic force generated by geometric discontinuities between a wheel and the rail at joint gaps is one of the weak points in track structure.…”

Section: Introductionmentioning

confidence: 99%

Observation and Simulation of Axle Box Acceleration in the Presence of Rail Weld in High-Speed Railway

Wang

et al. 2017

Applied Sciences

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Rail welds are widely used in high-speed railways and short-wave irregularities usually appear due to limitations in welding technology. These irregularities can excite a high wheel/rail force and are regarded as the main cause of deterioration in track structures. To measure this fierce force (or deterioration of the rail weld), axle box acceleration is treated as an effective and economic measure, though an exact quantitative relation between these two quantities remains elusive. This paper aims to develop such a relation in order to provide a new theoretical basis and an analysis method for monitoring and controlling weld geometry irregularity. To better understand the characteristics of axle box acceleration, the paper consists of two parts: an observation and a numerical simulation of axle box acceleration by rail welds. Based on measured data from field tests, axle box acceleration at rail welds was found to have high-frequency vibrations in two frequency bands (i.e., 350-500 Hz and 1000-1200 Hz). Upon analyzing the vibration characteristics in time-frequency domains, the exact location of the rail weld irregularity could be identified. Subsequently, a 3D high-speed wheel/rail rolling contact finite element model was employed to investigate the effect of rail weld geometry on axle box acceleration, and led to the discovery that the weld length and depth determine the vibration frequency and amplitude of the axle box acceleration, respectively. A quantitative relation between axle box acceleration and wheel/rail force has also been determined. Finally, we propose an approach for real-time health detection of rail welds and discuss the influence of other defects and rail welds on the acceleration signal of the axle box.

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“…Tram systems are embedded in cities and urban areas (Shi et al, 2017;Zhao et al, 2018). Over time, tram traffic and various exogenous variables cause the natural deterioration of the whole tram infrastructure (Oregui et al, 2017). Without an adequate tram asset management strategy, safety and the good structural health condition of the tram system cannot be guaranteed by the infrastructure manager (Talbot, 2013;Wu et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

Decision support tool based on multi-source data analysis for the tram wheel-rail interface

Xie

Núñez

Maas³

et al. 2018

IFAC-PapersOnLine

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This paper presents a methodology to support decision making based on the tram wheel-rail interface condition. The methodology relies on the following measurements: tram failure log-files regarding wheel-sliding events, monitored acoustics data and open source weather information. The proposed methodology consists of three stages: 1) data collection and pre-processing, 2) spatial analysis based on clustering, and 3) decision support based on the extracted information. For clustering, the Density-Based Algorithm (DBSCAN) is used for the analysis of wheel-sliding events. Self-organizing maps (SOMs) are employed for the analysis of acoustics data. A real-life case study is used to show how use of the methodology can find interesting hotspots that are candidates for further monitoring and maintenance actions. The measurements were obtained from the tram system in the city of Rotterdam, The Netherlands.

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Monitoring bolt tightness of rail joints using axle box acceleration measurements

Cited by 57 publications

References 26 publications

Development of a New Downscale Setup for Wheel-Rail Contact Experiments under Impact Loading Conditions

Development of a New Downscale Setup for Wheel-Rail Contact Experiments under Impact Loading Conditions

Observation and Simulation of Axle Box Acceleration in the Presence of Rail Weld in High-Speed Railway

Decision support tool based on multi-source data analysis for the tram wheel-rail interface

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