Simulation tests of dynamics of vibroisolated railway lines with vibroisolating system based on elastomer elements

Authors

  • Jarosław Bednarz AGH University of Science and Technology in Cracow
  • Jan Targosz AGH University of Science and Technology in Cracow

DOI:

https://doi.org/10.24136/atest.2019.026

Keywords:

simulation tests, vibroisolation, vibration analysis

Abstract

The problem of propagation of vibration waves caused by the movement of rail vehicles in the ground is extremely important from the point of view of environmental protection against negative effects of dynamic impacts caused by rail transport. Therefore, there is a need to develop new methods for analyzing dynamic phenomena related to rail vehicle traffic. One of the methods that can be used to evaluate dynamic interactions is modeling using finite elements. The article presents a dynamic analysis of the track structure model and the impact of the application of its vibroisolation system on the level of ground vibration amplitude associated with the propagation of vibration waves from the track. The application of the finite element meth-od allows for the analysis of the behavior of engineering structures in variable operating conditions dependent primarily on the speed of movement of vehicles on the track. Such analysis includes the use of a number of physical values that can be used to assess the impact of vibration on any engineering object. These values include, above all, acceleration at any measuring point on the measurement cross-section from the track to the engineering construction, e.g. a residential or industrial building as well as displacement or stress, which are dependent on the speed of the rail vehicle. Comparison of these values with generally available criteria and standards allows at the stage of designing the engineering structure for appropriate modifications to the substructure construction to limit the amplitude of the vibrations transmitted to the environment. These modifications consist mainly of the use of an appropriate vibroisolation system in the form of, for example, slabs or mats laid in the rail layer or pads underneath. Correct execution of the simulation requires careful preparation of the numerical model as well as a series of input data. The input data relate mainly to accurate material data concerning both engineering structures (bridges, viaducts, tunnels), rolling stock and soil parameters. Such data allow to prepare a spectrum of forces loading the modelled section of the track. This approach to the design process is particularly important due to the inability to modify the track after built it.

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References

Bednarz J., Targosz J.: Experimental analysis of the propagation of vibrations in the ground caused by the passing rail vehicles [in Polish:Eksperymentalna analiza rozchodzenia się drgań w gruncie wywołanych przejazdem pojazdów szynowych], Logistyka, nr 6, str. 153-160, 2011.

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LS-DYNA KEYWORD USER'S MANUAL, 2012

Polish standard PN-B-02170:2016-12 - Assessment of the harm-fulness of vibrations transmitted by the ground to buildings [in Polish: Polska norma PN-B-02170:2016-12 – Ocena szkodliwości drgań przekazywanych przez podłoże na budynki],

Stuit G.: Modelling of soil vibrations from railway tunnels, Journal of Sound and Vibration, v. 267, str. 605–619, 2003.

Targosz J.: Analysis of physico-mechanical properties of elasto-meric structures minimizing the dynamic impact of the railway track on the environment [in Polish:Analiza i badania właściwości fizykomechanicznych ustrojów elastomerowych, minimalizujących dynamiczne oddziaływania podtorza kolejowego na otoczenie], TTS – Technika Transportu Szynowego, nr 5-6, str.87-91,2008.

Targosz J.: Possibilities of limiting the influence of soil vibrations on engineering structures [in Polish: Możliwości ograniczenia wpływu drgań gruntu na konstrukcje inżynierskie], TTS – Technika Trans-portu Szynowego, nr 10, str. 3203–3212, 2013.

Targosz J.: Vibroisolation systems for rail and car transport [in Polish: Układy wibroizolacji w transporcie szynowym i samochodowym] , Uczelniane Wydawnictwa Naukowo-Dydaktyczne AGH, Kraków, 2007.

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Published

2019-02-28

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Section

Articles

How to Cite

Simulation tests of dynamics of vibroisolated railway lines with vibroisolating system based on elastomer elements. (2019). AUTOBUSY – Technika, Eksploatacja, Systemy Transportowe, 20(1-2), 151-155. https://doi.org/10.24136/atest.2019.026

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