Wheel-rail contact force measurement using strain gauges and distance lasers on a scaled railway vehicle

Urda, Pedro; Muñoz, Sergio; Aceituno, Javier F.; Escalona, José L.

doi:10.1016/j.ymssp.2019.106555

Cited by 38 publications

(13 citation statements)

References 26 publications

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“…Some studies have been carried out in the scaled track described in this paper measuring vertical, lateral and longitudinal forces as shown in 38 . The contact forces measured in 38 and validated with computational models cannot be directly extrapolated to the contact forces obtained in a full-scale system due to similarity laws, but the measurement techniques can be extended to real vehicles following an equivalent methodology. Effect on vehicle dynamics of the change in track stiffness as it occurs when there is a bridge.…”

Section: Design Requirementsmentioning

confidence: 99%

Design and manufacture of a scaled railway track with mechanically variable geometry

Chamorro

Aceituno

Urda

et al. 2022

Sci Rep

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The objective of this article is to present the design and manufacture of a scaled railroad track to be used as a laboratory track for the study of different railway applications. It could be a guideline for future laboratory railroad tracks. The ideal concept was based on possible future studies and, according to them, design requirements have been specified. The main characteristic of the track is that its geometry can be mechanically modified and irregularities can be introduced under controlled conditions in any kind of track sections: straight, curved and transition ones. Finally, the current installed track is shown and the performed quality controls are described.

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Section: Design Requirementsmentioning

confidence: 99%

Design and manufacture of a scaled railway track with mechanically variable geometry

Chamorro

Aceituno

Urda

et al. 2022

Sci Rep

Self Cite

View full text Add to dashboard Cite

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“…Every time the vehicle passes a beacon, the instantaneous position registered by the encoder is compared with the real position of the beacon at the track and updated if necessary. Finally, a dynamometric wheelset (front axle) instrumented with strain gauges and high-precision distance lasers, as shown in [27], measures the instantaneous applied lateral force. The vehicle is powered by a 24 W DC motor and a set of lead-acid batteries.…”

Section: Instrumented Scaled Vehiclementioning

confidence: 99%

“…The ultimate goal of this work is to demonstrate the accuracy and robustness of the simplified model in a real scenario. For that purpose, a set of experiments have been carried out using an instrumented 1:10 scaled vehicle [27] running on an experimental scaled track at different forward velocities. The vehicle is instrumented with two inertial sensors that register the acceleration and angular velocity of the leading wheelset and the bogie frame respectively, two distance lasers that measure the deflection experienced by the primary suspension, two position encoders that register the forward velocity and travelled distance, and a dynamometric wheelset for the measurement of wheel-rail contact forces.…”

Section: Introductionmentioning

confidence: 99%

Application and Experimental Validation of a Multibody Model with Weakly Coupled Lateral and Vertical Dynamics to a Scaled Railway Vehicle

Urda

Muñoz

Aceituno

et al. 2020

Sensors

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In this paper, a multibody dynamic model of a railway vehicle that assumes that vertical and lateral dynamics are weakly coupled, has been experimentally validated using an instrumented scaled vehicle running on a 5-inch-wide experimental track. The proposed linearised model treats the vertical and lateral dynamics of the multibody system almost independently, being coupled exclusively by the suspension forces. Several experiments have been carried out at the scaled railroad facilities at the University of Seville in order to test and validate the simulation model under different working conditions. The scaled vehicle used in the experiments is a bogie instrumented with various sensors that register the accelerations and angular velocities of the vehicle, its forward velocity, its position along the track, and the wheel–rail contact forces in the front wheelset. The obtained results demonstrate how the proposed computational model correctly reproduces the dynamics of the real mechanical system in an efficient computational manner.

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“…In this regard, experimental ways to characterise the contacts within the IRJ region are highly desired, which is however not easy even for conventional wheel-rail contacts. Currently, in field tests, the wheel-rail contact force is mainly estimated indirectly by measuring the dynamic responses of rail tracks using an array of strain gauges or other sensors [19,20]. Early attempts have been made to directly inspect the contact interface using airflow through pre-drilled holes on the rail head [21], or more recently, using pressure sensitive films [22,23].…”

Section: Introductionmentioning

confidence: 99%

Insulated rail joint (IRJ) contact characterisation-an ultrasonic reflectometry approach for a cross-material interface

Zhou

Luo

Lewis

2023

Smart Mater. Struct.

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Vehicle-track interaction at insulated rail joints (IRJs) plays a significant role in the wear evolvement and damage of the IRJ components. It is, however, challenging to characterise the contact conditions within the region non-destructively and accurately using experimental tools, especially when the IRJ contact involves both wheel-rail and wheel-endpost contact pairs. This study presents an ultrasonic technique to monitor and characterise static IRJ contacts in a non-invasive manner. The proposed ultrasonic reflectometry technique can realise high-resolution visualisation of contact patch and contact pressure distribution for both wheel-rail contact and wheel-endpost contact, by striking a beam of focused ultrasonic signals at the contact interface. Different data post-processing strategies are applied for the two types of contacts and a deconvolution algorithm is applied to rectify the measurements near the railendpost boundary. The ultrasonic measurements are verified through FE simulations and the results show good agreement with each other in terms of both contact area and contact pressure level. It is expected that the proposed ultrasonic approach can be a reliable tool to assist in revealing the contact behaviour of IRJs more profoundly.

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Wheel-rail contact force measurement using strain gauges and distance lasers on a scaled railway vehicle

Cited by 38 publications

References 26 publications

Design and manufacture of a scaled railway track with mechanically variable geometry

Design and manufacture of a scaled railway track with mechanically variable geometry

Application and Experimental Validation of a Multibody Model with Weakly Coupled Lateral and Vertical Dynamics to a Scaled Railway Vehicle

Insulated rail joint (IRJ) contact characterisation-an ultrasonic reflectometry approach for a cross-material interface

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