Optimum railway transition curves for different circular arc radii
This article concerns assessing the dynamical properties and shape optimization of railway transition curves (TCs) for the wide range – 600, 900, 1200, 2000, 3000, and 4000 m – of circular arc radii. The search for the optimum shape means in the current article the evaluation of the curve properties...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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Polish Academy of Sciences
2022-12-01
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| Series: | Archives of Civil Engineering |
| Subjects: | |
| Online Access: | https://journals.pan.pl/Content/125669/PDF/art07_int.pdf |
| _version_ | 1797954366281351168 |
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| author | Krzysztof Zboinski Piotr Woznica |
| author_facet | Krzysztof Zboinski Piotr Woznica |
| author_sort | Krzysztof Zboinski |
| collection | DOAJ |
| description | This article concerns assessing the dynamical properties and shape optimization of railway transition curves (TCs) for the wide range – 600, 900, 1200, 2000, 3000, and 4000 m – of circular arc radii. The search for the optimum shape means in the current article the evaluation of the curve properties based on chosen dynamical quantities and generation of such shapes with use of a mathematically understood optimization method. As a transition curve in the studies performed, the authors adopted a polynomial of n-th degree, where n = 9 and 11. In the study one model of rail vehicle was used. The model represented 2-axle freight car of the average values of parameters. The authors took the so-called standard transition curves of 9th and 11th degrees, and 3rd degree parabola as initial transition curves in the optimization processes. As quality functions (evaluation criteria) the authors used three functions concerning lateral and vertical vehicle dynamics, and creepages in wheel-rail contact. In this work, the results of the optimization – types of the curvatures of the optimum transition curves – were presented and compared. |
| first_indexed | 2024-04-10T23:17:30Z |
| format | Article |
| id | doaj.art-4ee50cc882ba4aba8d01c867f7d59aab |
| institution | Directory Open Access Journal |
| issn | 1230-2945 |
| language | English |
| last_indexed | 2024-04-10T23:17:30Z |
| publishDate | 2022-12-01 |
| publisher | Polish Academy of Sciences |
| record_format | Article |
| series | Archives of Civil Engineering |
| spelling | doaj.art-4ee50cc882ba4aba8d01c867f7d59aab2023-01-12T18:06:08ZengPolish Academy of SciencesArchives of Civil Engineering1230-29452022-12-01vol. 68No 4111125https://doi.org/10.24425/ace.2022.143029Optimum railway transition curves for different circular arc radiiKrzysztof Zboinski0https://orcid.org/0000-0002-6967-4244Piotr Woznica1https://orcid.org/0000-0002-3715-966XWarsaw University of Technology, Faculty of Transport, ul. Koszykowa 75, 00-662 Warsaw, PolandWarsaw University of Technology, Faculty of Transport, ul. Koszykowa 75, 00-662 Warsaw, PolandThis article concerns assessing the dynamical properties and shape optimization of railway transition curves (TCs) for the wide range – 600, 900, 1200, 2000, 3000, and 4000 m – of circular arc radii. The search for the optimum shape means in the current article the evaluation of the curve properties based on chosen dynamical quantities and generation of such shapes with use of a mathematically understood optimization method. As a transition curve in the studies performed, the authors adopted a polynomial of n-th degree, where n = 9 and 11. In the study one model of rail vehicle was used. The model represented 2-axle freight car of the average values of parameters. The authors took the so-called standard transition curves of 9th and 11th degrees, and 3rd degree parabola as initial transition curves in the optimization processes. As quality functions (evaluation criteria) the authors used three functions concerning lateral and vertical vehicle dynamics, and creepages in wheel-rail contact. In this work, the results of the optimization – types of the curvatures of the optimum transition curves – were presented and compared.https://journals.pan.pl/Content/125669/PDF/art07_int.pdfrailway transition curvesoptimizationrailway dynamicscomputer simulation |
| spellingShingle | Krzysztof Zboinski Piotr Woznica Optimum railway transition curves for different circular arc radii Archives of Civil Engineering railway transition curves optimization railway dynamics computer simulation |
| title | Optimum railway transition curves for different circular arc radii |
| title_full | Optimum railway transition curves for different circular arc radii |
| title_fullStr | Optimum railway transition curves for different circular arc radii |
| title_full_unstemmed | Optimum railway transition curves for different circular arc radii |
| title_short | Optimum railway transition curves for different circular arc radii |
| title_sort | optimum railway transition curves for different circular arc radii |
| topic | railway transition curves optimization railway dynamics computer simulation |
| url | https://journals.pan.pl/Content/125669/PDF/art07_int.pdf |
| work_keys_str_mv | AT krzysztofzboinski optimumrailwaytransitioncurvesfordifferentcirculararcradii AT piotrwoznica optimumrailwaytransitioncurvesfordifferentcirculararcradii |