simulation of torsion moment at the wheel set of the railway vehicle ...

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REVIEWKnowledge of the extent of resistance of tyres to various modesof loading and effects of the environment is gained from tests ofstrength and life – in other words from destructive tests (Fig. 4).6. Tests of tyres for computational modelsComputational modelling requires confirmation analyses combinedwith experiments. This is the reason why it is necessary torun not only tests of tyres as a whole, as shown in Fig. 4, but alsotests of individual tyre casing components [3], purposely separatedparts etc.This is how an overview which structural modifications canlead to an increase of the level of safety criteria, increase of resistance,life etc. can be obtained.Basic statical deformation characteristics of tyres can beobtained from a device called statical adhesor (Fig. 5), which isavailable to author. The statical adhesor also enables measurementof data from the contact surface under defined conditions,as presented in Fig. 5.7. Computational modelling of tyresIf relevant results are obtained from experimental modellingof whole tyres and individual components and all input data areavailable, generation of computational models of the tyre casingcan proceed [4]. On the basis of the author’s long experience theFEM model of an actual radial tyre (Fig. 6) was generated whichis “open” to different modes of loading and analyses assumingnecessary input data are completed into the calculations.8. ConclusionsThis contribution deals only with a specific field which thecomputing engineer has to be well acquainted with from an operatingand safety point of view and from the resulting requirementsfor tyre resistance. This is the only way how to obtain highlysophisticated computational models of tyres, naturally assumingknowledge of accurate material parameters of all parts of the tyrecasing and of the other necessary data such as inputs of road characteristics,load, type of car, etc.Fig. 4 Tests of the tyre as a whole [1]64 ● COMMUNICATIONS 3/2008
REVIEWFig. 6 Computational model “open“ to further analyses (cross section)Approach to the compiling of the computational models ofthe tyre shown in [2] can be applied also to the other constructiontypes of the tyres, different sizes, etc.Fig. 5 Statical adhesor and measureable data of the tyreReferences[1] KRMELA, J.: Design of the Computational Three-Dimensional Model of the Radial-ply Tyre (in Czech), [Dissertation thesis], CeskaTrebova, Jan Perner Transport Faculty, University of Pardubice, Czech Republic, 2004, p. 226[2] KRMELA, J.: Systems Approach to the Computational Modelling of Tyres – I. Part (in Czech), Monograph, Brno, Czech Republic,2008, p. 102, ISBN 978-80-7399-365-8, Online: [3] KRMELA, J., PESLOVA, F., HAJDUCHOVA, L.: Composite with Elastomer’s Matrix (in Czech), Material Engineering, Universityof Zilina, 3/2004, pp. 17–24, ISSN 1335-0803.[4] KRMELA, J.: The Computational Modelling of Multi-Layer Composites’ Materials (in Czech), Proc. of conference Dynamic Rigid andDeformable Bodies 2006, Usti nad Labem, Czech Republic, 2006, pp. 103–110, ISBN 80-7044-782-6.[5] RUSNAKOVA, S. et al.: Assessment of Espi Technique for Detection of Vibration Behaviour of Composite Laminates, Proc. of 12thInternational conference on Problems of Material Engineering, Mechanics and Design, Jasna, Slovakia: 2007, CD-ROM – Full textsof paper, p. 3, ISBN 978-80-969728-0-7.[6] KRMELA, J., HAJDUCHOVA, L., PESLOVA, F., JANICEK, P.: Composite Structures Used in Tyre, Proc. of 22 nd InternationalColloquium Advanced Manufacturing and Repair Technologies in Vehicle Industry, Poland, 2005, pp. 15–16, ISBN 80-8070-393-0.COMMUNICATIONS 3/2008 ●65
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Mt = k$ Di(12) 4. Torsion moment at
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References[1] JOVANOVIC, R.: Tensio
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Fig. 3 Geometrical parameters of ch
Page 12 and 13: Fig. 13 10. eigenvector when the ei
Page 14 and 15: and D R _ y,wi=0 if y 0 (12) Dampe
Page 16 and 17: Fig. 22 Comfort for passengers for
Page 18 and 19: 3. Intermodal trainsIntermodal trai
Page 20 and 21: Fig. 2 Consignment reloading proces
Page 22 and 23: attached to individual tracks shown
Page 24 and 25: Juraj Gerlici - Tomas Lack *MODIFIE
Page 26 and 27: After the insertion of the previous
Page 28 and 29: where:k - is the basic spring stiff
Page 30 and 31: [2] GERLICI, J., LACK, T.: Methods
Page 32 and 33: Resulting from experience the degre
Page 34 and 35: Upon this strengthening of pretensi
Page 36 and 37: attained the 6th position of the be
Page 38 and 39: Jozef Jandacka - Stefan Papucik - V
Page 40 and 41: spacing of the fan from the measuri
Page 42 and 43: 5. ConclusionFrom the results prese
Page 44 and 45: REVIEWlines with numerous curves th
Page 46 and 47: REVIEWmeters from the point of view
Page 48 and 49: REVIEWBojan Cene - Aleksandar Rados
Page 50: REVIEWthe year 2006 in Slovenia sta
Page 53 and 54: REVIEWthat the GPS does not recogni
Page 55 and 56: REVIEWRadomir Brkic - Zivoslav Adam
Page 57 and 58: REVIEWfailures. For example, for an
Page 59 and 60: REVIEWJan Krmela *COMPUTATIONAL MOD
Page 61: REVIEWFor this reason tyres and whe
Page 65 and 66: REVIEW- guarantee that the messages
Page 67 and 68: REVIEWIvana Olivkova *PASSENGER INF
Page 69 and 70: REVIEWLike the other information sy
Page 71 and 72: REVIEWFig. 1 Revolution of the poin
Page 73 and 74: REVIEWFig. 4 Transformation of the
Page 75 and 76: BOOK REVIEWKavicka, A., Klima, V.,
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