Parametric Study of the Influence of Nonlinear Elastic Characteristics of Rail Pads on Wheel–Rail Vibrations

Mazilu, Traian; Dumitriu, Mădălina; Răcănel, Ionuţ Radu

doi:10.3390/ma16041531

Cited by 5 publications

(3 citation statements)

References 31 publications

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“…The vibration and noise characteristics of wheel-rail systems have been extensively studied by many scholars [7]. Mazilu studied that wheel-rail vibration is related to the material of the rail [8]. The influence of rubber design parameters of He elastic wheels on noise [9].…”

Section: Introductionmentioning

confidence: 99%

Dynamic Characteristics and Experimental Study of Rail Belt Conveyor Operation Process

Shi,

Li,

Liu

et al. 2024

Advances in Transdisciplinary Engineering

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Based on the wheel-rail belt conveyor of a new type of mining machinery conveying equipment as the research object, the mechanical properties of the operation process are studied. The differential motion equation between the trolley and the track was established by using D’Alembert’s principle, and the dynamic simulation analysis was carried out by Recurdyn to obtain the contact force between the trolley and the track during operation. The static analysis of the bracket, track and slewing part was carried out with COMSOL to explore the weak position of the overall structure. Finally, the dynamic simulation and static analysis are compared with experiments to verify the feasibility of the theory and simulation. The results show that the contact force of the trolley on the upper track is significantly greater than that of the lower track, and the trolley has a large impact force in the in-and out slewing part, which is the main component that generates noise. The position of the carrier at the seams of the rails, the connection between the track and the bracket, and the position of the inlet and exit slewing part are the places where the maximum stress occurs.

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Section: Introductionmentioning

confidence: 99%

Dynamic Characteristics and Experimental Study of Rail Belt Conveyor Operation Process

Shi,

Li,

Liu

et al. 2024

Advances in Transdisciplinary Engineering

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“…The railway tracks are studied using local elasticity indicators [6][7][8][9][10] and geometry monitoring indicators [11][12][13][14][15][16] or similar indicators, which are obtained by numerical processing of data provided by the measurement systems of a track recording car vehicle. Diagnostics of the technical condition of a railway track cover the following aspects [17][18][19][20][21][22][23][24][25]:…”

Section: Introductionmentioning

confidence: 99%

Novel ‘Closed’-System Approach for Monitoring the Technical Condition of Railway Tracks

Bondarenko,

Lukoševičius,

Neduzha

2024

Sustainability

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Assessing the technical condition of a railway track throughout its service life is crucial to ensuring functional safety. However, it is important to note that current approaches have theoretical and practical gaps that require attention. The purpose of this study is to discuss the reconceptualization of an integrated approach to assess changes in the technical condition of railway tracks caused by rolling stock over their service life. Improving existing systems for assessing the condition of the track can be achieved by modifying the model concept and, subsequently, the measurement and assessment procedures. This paper presents an alternative method for addressing technical issues related to the monitoring and diagnosis of railway tracks, with a particular focus on natural phenomena: energy transfer by elastic waves. The primary aim of this work is to propose an approach for designing a ‘closed’ measurement system that enables tracking of the cause-and-effect relationship. This system takes into account both the elastic dissipative characteristics of the track–rolling stock interaction and the influence of the dynamics of various components in the ‘train-track’ system.

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“…Torstensson [ 25 ] used a combination of time-domain simulation of nonlinear vertical dynamic vehicle-track interaction and a hybrid prediction model using linear frequency domain to calculate and predict sound pressure levels for railway crossing wheel-rail impact loads and noise. Mazilu [ 26 ] studied the influence of rail pad elastic properties on wheel-rail vibration from the perspective of wheel-rail contact force and wheel-rail acceleration by establishing a non-uniform foundation model. Song [ 27 ] developed a numerical model of a U-shaped girder bridge with piers and frequency-dependent stiffness fasteners (FDSF) and discussed the acoustic contribution and sound pressure distribution of the piers and stiffness fasteners.…”

Section: Introductionmentioning

confidence: 99%

Vibration and Noise Analysis and Experimental Study of Rail Conveyor

Hao

Sun

Zhang

et al. 2023

Sensors

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The rail conveyor is a new type of energy-saving system for the long-distance transportation of bulk materials. Operating noise is an urgent problem that the current model faces. It will cause noise pollution and affect the health of workers. In this paper, the factors causing vibration and noise are analyzed by modeling the wheel-rail system and the supporting truss structure. Based on the built test platform, the system vibration of the vertical steering wheel, the track support truss, and the track connection were measured, and the vibration characteristics at different positions were analyzed. Based on the established noise and vibration model, the distribution and occurrence rules of system noise under different operating speeds and fastener stiffness conditions were obtained. The experimental results show that the vibration amplitude of the frame near the head of the conveyor is the largest. The amplitude under the condition of 2 m/s running speed at the same position is 4 times that under the condition of 1 m/s. At different welds of the track, the width and depth of the rail gap have a great influence on the vibration impact, which is mainly due to the impact of the uneven impedance at the track gap, and the greater the running speed, the more obvious the vibration impact. The simulation results show the trend of noise generation, the speed of the trolley, and the stiffness of the track fasteners have a positive effect on the generation of noise in the low-frequency region. The research results of this paper will play an important role in the noise and vibration analysis of rail conveyors and help to optimize the structure design of the track transmission system.

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Parametric Study of the Influence of Nonlinear Elastic Characteristics of Rail Pads on Wheel–Rail Vibrations

Cited by 5 publications

References 31 publications

Dynamic Characteristics and Experimental Study of Rail Belt Conveyor Operation Process

Dynamic Characteristics and Experimental Study of Rail Belt Conveyor Operation Process

Novel ‘Closed’-System Approach for Monitoring the Technical Condition of Railway Tracks

Vibration and Noise Analysis and Experimental Study of Rail Conveyor

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