Mechanical modelling and application of vibroacoustic isolators in railway tracks

Zbiciak, Artur; Kraśkiewicz, Cezary; Oleksiewicz, Wojciech; Płudowska-Zagrajek, Monika; Lipko, Cezary

doi:10.1051/matecconf/201711700090

Cited by 12 publications

(9 citation statements)

References 4 publications

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“…In [11], the role of USP in decreasing the ballast degradation and reducing the permanent deformation of the track is discussed. Papers [12][13][14][15][16][17][18] are dedicated to the mechanical modeling of railway track structures with elastic vibration isolators, such as the under sleeper pads considered in the present work.…”

Section: Of 14mentioning

confidence: 99%

A Novel Approach to the Analysis of Under Sleeper Pads (USP) Applied in the Ballasted Track Structures

et al. 2020

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The present paper is dedicated to the analysis of under sleeper pads (USP), which are resilient elements used in ballasted track systems as vibration isolators. Four types of USP are considered. The authors present the results of laboratory tests, which are then used as input values for the finite element (FE) and mechanical model of the structure. A special focus is put on the description of an original four-degree-of-freedom (4DoF) mechanical model of the system that includes a fractional rheological model of USP. Using the proposed approaches, the dynamic characteristics of under sleeper pads are determined, and conclusions on vibration isolation effectiveness are drawn.

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Section: Of 14mentioning

confidence: 99%

A Novel Approach to the Analysis of Under Sleeper Pads (USP) Applied in the Ballasted Track Structures

et al. 2020

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“…The basic parameters characterizing the elastic properties of USP, evaluated due to their main functions described above, are static and dynamic stiffness modules [4,5,6]. They affect the effectiveness of damping vibration transmission and noise emission to the environment of railway lines [12]. For USP with a higher value of stiffness modules, this efficiency will be lower than for pads with lower stiffness values.…”

Section: Static and Dynamic Elastic Properties Of Uspmentioning

confidence: 99%

Selected laboratory tests on under sleeper pads (USP) used in the railway track system

Kraśkiewicz

Oleksiewicz

Wasilewski

2019

TO - PK

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In the present paper results of the tests for fatigue strength and resistance to severe environ-mental conditions performed on several prototypical under sleeper pads (USP) are presented. The work includes results of the static and dynamic tests carried out on samples of three materials, which were used to produce the USP. The fatigue tests were performed up to 500 thousand load cycles and they aimed at determining which of the analysed USP have favourable properties, taking into account their potential application as the elements used for reduction of stresses in the ballast – especially in the ballast layer directly under the sleeper – and reduction of the material and acoustic vibration emitted to the railway track’s surrounding (vibration and noise). In the climatic tests that were aimed at determining the influence of severe environmental conditions on the properties of USP, the samples were attached to concrete blocks and immersed in water for 24 h and then placed in a climatic chamber, where they were subjected to freeze-thaw cycles. The results show that both the fatigue and climatic tests have influence on the damping-related parameters of the USP, what affects the effectiveness of the vibration isolation.

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“…Such a model being partially analysed in [7] is also presented in Standard [8] for calculation of insertion loss. The state-space formulation of differential equations representing this model is given in [9] applying the algorithm of eigenvalue problem solution described in [10]. In this section there are demonstrated selected dynamic characteristics of the system retrofitted with viscoelastic fractional model of USP (Fig.…”

Section: Mechanical Model Of Ballast Railway Trackmentioning

confidence: 99%

Static and Dynamic Parameters of Railway Tracks Retrofitted With Under Sleeper Pads

Kraśkiewicz¹,

Zbiciak²,

Oleksiewicz³

et al. 2018

Archives of Civil Engineering

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The paper presents results of the laboratory tests made for the prototype resilient under sleeper pads in the Warsaw University of Technology laboratory unit. These pads are dedicated to reduce vibrations transmitted to the vicinity of the railroad and to improve the resistance of the railroad structure. The laboratory testing program was carried out for elastomeric materials (polyurethane and rubber based) due to the PN-EN 16730 standard. The obtained values of the key parameters were used in order to determine the insertion loss vibration level by applying analytical method. The paper presents the influence of selected parameters i.e. static and dynamic moduli on the reduction of vibration and structure-borne sound level.

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Mechanical modelling and application of vibroacoustic isolators in railway tracks

Cited by 12 publications

References 4 publications

A Novel Approach to the Analysis of Under Sleeper Pads (USP) Applied in the Ballasted Track Structures

A Novel Approach to the Analysis of Under Sleeper Pads (USP) Applied in the Ballasted Track Structures

Selected laboratory tests on under sleeper pads (USP) used in the railway track system

Static and Dynamic Parameters of Railway Tracks Retrofitted With Under Sleeper Pads

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