An efficient condition monitoring strategy of railway vehicle suspension based on recursive least-square algorithm

Liu, Xiaoyuan; Alfi, Stefano; Bruni, Stefano

doi:10.1201/b21185-91

Cited by 4 publications

(5 citation statements)

References 5 publications

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“…Table 11 also shows that in model M3a, for the same unsprung mass and mean of the vertical stiffness, an increase of 10 kN/mm in the standard deviation of the vertical stiffness corresponds to a relative increase in the deterioration rates of 53.5% (l 2 Â 10 ¼ 0:535) for the SD b . This is line with previous findings in other set of simulations (Grossoni et al 2015), though this time the speed is lower and might have inflated the influence of the vertical stiffness standard deviation. 42 The influence of speed and axle load…”

Section: Resultssupporting

confidence: 93%

“…This is line with previous findings in other set of simulations (Grossoni et al 2015), though this time the speed is lower and might have inflated the influence of the vertical stiffness standard deviation. 42 The influence of speed and axle load…”

Section: Resultssupporting

confidence: 93%

“…They suggest that the speed is more crucial in localized corrective maintenance needs than in preventive maintenance needs. This is in line with previous results ( [42]). The axle load, on the other hand, plays an important role and there is an increase of ca.…”

Section: The Influence Of Speed and Axle Loadsupporting

confidence: 94%

“…This is in line with previous results. 42 The axle load, on the other hand, plays an important role and there is an increase of ca. 48.1 and 53.5% in case of SD b and max b , respectively, w.r.t.…”

Section: Resultsmentioning

confidence: 99%

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The role of track stiffness and its spatial variability on long-term track quality deterioration

Grossoni

Andrade

Bezin

et al. 2018

Proceedings of the Institution of Mechanical Engineers, Part F:

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With rapid advances in sensor and condition monitoring technologies, railways infrastructure managers are turning their attention towards the promises that digital information and big data will help them understand and manage their assets more efficiently. In addition to existing track geometry records, it is evident that track stiffness is a key physical quantity to help assess track quality and its long-term deterioration. The present paper analyses the role of the track stiffness and its spatial variability through a set of computational experiments, varying other vehicle and track physical quantities such as vehicle unsprung mass, speed and track vertical irregularities. The support stiffness conditions are obtained using a sample procedure from an Autoregressive Integrated Moving Average (ARIMA) model to generate representative larger set of data from previously on-site measured data. A set of computational experiments is carefully designed, varying different physical variables, and a vehicle-track interaction model is used to estimate track geometry deterioration rates. A series of log-linear regression models are then used to analyse the impact of the tested physical variables on the track deterioration. The main findings suggest that the spatial variability of track stiffness contributes significantly to the track deterioration rates, and thus it should be used in the future to better target design and maintenance of railway track. Finally, a comparative study of some settlement models available in literature shows that they are very dependent on the test conditions under which they have been derived.

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Section: Resultssupporting

confidence: 93%

Section: Resultssupporting

confidence: 93%

Section: The Influence Of Speed and Axle Loadsupporting

confidence: 94%

Section: Resultsmentioning

confidence: 99%

See 2 more Smart Citations

The role of track stiffness and its spatial variability on long-term track quality deterioration

Grossoni

Andrade

Bezin

et al. 2018

Proceedings of the Institution of Mechanical Engineers, Part F:

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“…The support stiffness was applied through spring elements in the effective length in both sides of the load position. Three support stiffness cases of 30, 115 and 200 kN/mm were investigated in an initial modelling phase assessed from recent literature 31,32 ; further cases with degraded support stiffness or sand 15 kN/mm were subsequently added. A minimum dynamic sleeper support stiffness of 30 kN/mm per sleeper end has been defined for a renewed trackbed and of 60 kN/mm for a new trackbed.…”

Section: Finite Element Analysis Modelmentioning

confidence: 99%

Potential for external reinforcement of insulated rail joints

Gallou

Temple

Hardwick

et al. 2016

Proceedings of the Institution of Mechanical Engineers, Part F:

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This paper aims to investigate alternative ways of reducing the deterioration and failure of railway track insulated rail joints (IRJs). Joints deteriorate faster than rail initially due to the structural discontinuity present. This weakness results in both extra displacement as a consequence of applied load and the dynamic force that results as a consequence. Over time this situation worsens as the impacts and applied stresses both damage and soften the ballast and supporting subgrade under the joint. This study initially presents a static finite element model designed to simulate the mechanics of IRJs and a comparison between plain rail and a suspended insulated rail joint under various support stiffnesses. Product design options of reinforced IRJs are then chosen as input variables of the model. Results of the model are compared with field and laboratory data acquired via the Video Gauge, which is a new high-resolution optical measurement technique. Results show that the use of strap rails or more robust I-beam sections in the vicinity of the IRJ to stiffen the support structure can significantly reduce the displacement and the subsequent dip angle seen at an IRJ. This potentially presents a means of improving the IRJ behaviour. Their impact becomes more significant for soft support conditions. Although these results are indicative for new IRJ conditions, field measurements indicate that the magnitude of deflection of IRJs is a result of the structural discontinuity of the rail, the dynamic P2 force, the wheel condition, the degraded ballast and it significantly increases with time under repeated load. Thus, it is recommended that careful field implementation and testing will indicate the effect of an external enhancement on the timely degradation of insulated rail joints.

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Experimental Investigation of the Effects of Subgrade Strength and Geogrid Location on the Cyclic Response of Geogrid-Reinforced Ballast

Desbrousses,

Meguid,

Bhat

2023

Int. J. of Geosynth. and Ground Eng.

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An efficient condition monitoring strategy of railway vehicle suspension based on recursive least-square algorithm

Cited by 4 publications

References 5 publications

The role of track stiffness and its spatial variability on long-term track quality deterioration

The role of track stiffness and its spatial variability on long-term track quality deterioration

Potential for external reinforcement of insulated rail joints

Experimental Investigation of the Effects of Subgrade Strength and Geogrid Location on the Cyclic Response of Geogrid-Reinforced Ballast

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