Experimental Verification of Method to Synthesize the Track Vertical Irregularities

Dumitriu, Mădălina; Răcănel, Ionuţ Radu

doi:10.2478/rjti-2018-0011

Cited by 5 publications

(5 citation statements)

References 16 publications

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“…The RMS acceleration is also marked on the diagrams. In all the cases presented, it is observed that the RMS The accelerometers were mounted on a side of the bogie as follows: one accelerometer on each axle box and one accelerometer on the bogie frame against each axle (Figures 2 and 3) [30][31].…”

Section: Analysis Of Experimental Resultsmentioning

confidence: 99%

Experimental Analysis of Vertical Vibrations of a Railway Bogie

Dumitriu¹,

Cruceanu²

2021

Komunikácie

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The paper presents a study of the vertical vibrations of a bogie of a passenger vehicle, based on the acceleration of the axles and the bogie frames, measured during the running at a constant velocity. To this purpose, the root mean square (RMS) acceleration is calculated for more measurement sequences at different velocities. In principle, the RMS acceleration increases along with the velocity and influence of the variability of the amplitude in the track defects upon the dispersion of the values in the RMS acceleration. Based on the spectral analysis of the measured acceleration, wheel defects and undulatory wear of the rolling surfaces of wheels and rail are highlighted.

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Section: Analysis Of Experimental Resultsmentioning

confidence: 99%

Experimental Analysis of Vertical Vibrations of a Railway Bogie

Dumitriu¹,

Cruceanu²

2021

Komunikácie

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“…The method to synthesize the vertical track irregularities [56,57] relies on the power spectral density of the track irregularities, as described by ORE B176 [59] and the The coupling effects between the wheels due to the propagation of the bending waves through the rails are neglected, and an equivalent model with concentrated parameters is adopted for the track. Against each wheelset j and j + 1, respectively, of the bogie i, the track is represented with a one-degree freedom system on the vertical direction, the corresponding displacement being z rj,j+1 , with j = 2i − 1 and i = 1, 2.…”

Section: Synthesizing Of the Vertical Track Irregularitiesmentioning

confidence: 99%

“…The method to synthesize the vertical track irregularities [56,57] relies on the power spectral density of the track irregularities, as described by ORE B176 [59] and the specifications stipulated by the UIC 518 Leaflet [60] concerning the track geometry quality in the testing and homologation of the railway vehicles from the perspective of the dynamic behaviour. According to this method, the vertical track irregularities are described via a pseudo-random function.…”

Section: Synthesizing Of the Vertical Track Irregularitiesmentioning

confidence: 99%

“…Further on, the paper is structured into 5 sections. Section 2 contains a detailed presentation of the first model of the vehicle-track system for the simulation of the response to the bogie's vertical vibrations, the motion equations, and an original method to synthesize the track irregularities previously applied, both for the synthesis of the track vertical irregularities and for the track horizontal irregularities [56][57][58]. Section 3 introduces the architecture of the measurement system for the bogie vertical accelerations in a passenger vehicle in current line traffic and the analysis of the recorded data.…”

Section: Introductionmentioning

confidence: 99%

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Condition Monitoring of the Dampers in the Railway Vehicle Suspension Based on the Vibrations Response Analysis of the Bogie

Dumitriu

2022

Sensors

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This paper investigates the possibility of developing a new method for fault detection of a damper in the primary suspension of the railway vehicle, based on the analysis of the vertical vibration’s response of the bogie. To this purpose, experimental data are used, along with results from numerical simulations regarding the Root Mean Square (RMS) accelerations measured/simulated in four reference bogie points—two points on the chassis, against the suspension, and two points located against the axle boxes. The experimental data are utilized to define the normal area of operating and the damper failure area in the bogie primary suspension, as well as a basis for validating the results of numerical simulations. The numerical simulations are developed on the basis of two original models of the vehicle–track system, rigid-flexible coupled type, which take into account the elasticity of the vehicle carbody and the elasticity of the wheel-rail contact: a reference model with 15 degrees of freedom, for simulating the bogie response to vertical vibrations for the normal operating of the primary suspension dampers, and an extended model with 20 degrees of freedom, for simulating the bogie vibration response to the failure damper of a primary suspension. The presented results show that there are clear premises on the possibilities of developing a fault detection method of any of the four dampers of the primary suspension corresponding to a vehicle bogie, based on the RMS accelerations measured only in two reference points of the bogie.

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“…The localization of the track irregularities is presented in [21] by using the time and distance measurements.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study of Wheel-to-Rail Interaction Using Acceleration Sensors for Continuous Rail Transport Comfort Evaluation

Mihăilescu,

Popa,

Tudor

et al. 2023

Sensors

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Rail transport comfort is ensured by predictive maintenance and continuous supervision of rail quality. Besides the specialized equipment, the authors are proposing a simple system that can be implemented on operational wagons while in service, aiming to detect irregularities in the rail and report them using the train’s online communication lines. The sensor itself is an acceleration sensor connected to an electronic microcontroller able to filter the inrush acceleration and send it to the diagnosis system of the wagon. This paper presents a study of real data recorded of the transversal and vertical vibrations of a standard tank wagon, measured on 2 axles and the car body, followed by the interpretation of the recorded data.

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Experimental Verification of Method to Synthesize the Track Vertical Irregularities

Cited by 5 publications

References 16 publications

Experimental Analysis of Vertical Vibrations of a Railway Bogie

Experimental Analysis of Vertical Vibrations of a Railway Bogie

Condition Monitoring of the Dampers in the Railway Vehicle Suspension Based on the Vibrations Response Analysis of the Bogie

Experimental Study of Wheel-to-Rail Interaction Using Acceleration Sensors for Continuous Rail Transport Comfort Evaluation

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