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New transition curve adapted to railway operational requirements

Abstrakt

The paper points to the limited possibilities of improving the existing situation in the area of transition curves used in geometrical layouts of the railway track. Difficulties in the practical implementation and maintenance of very small horizontal ordinates of the transition curve and the ordinates of the gradient due to cant in the initial section, appearing on smooth transition curves, were indicated. The main reason for this situation was the excessive smoothing of the curvature in their initial section. Employing the method of curvature identification by differential equations, a new form of the curve was obtained, which was referred to as the "smoothed transition curve". A definite advantage of this curve was shown, from the implementation point of view, over representing the smooth transition curves of the Bloss curve and the parametric curve. It seems that it could successfully compete with the commonly used clothoid, to which it is similar in the initial section, while it differs significantly along its further length, especially in the final section, where it provides a gentle entry from the transition curve into a circular arc.

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Informacje szczegółowe

Kategoria:
Publikacja w czasopiśmie
Typ:
artykuł w czasopiśmie wyróżnionym w JCR
Opublikowano w:
JOURNAL OF SURVEYING ENGINEERING-ASCE nr 145, strony 1 - 11,
ISSN: 0733-9453
Język:
angielski
Rok wydania:
2019
Opis bibliograficzny:
Koc W.: New transition curve adapted to railway operational requirements// JOURNAL OF SURVEYING ENGINEERING-ASCE. -Vol. 145, iss. 3 (2019), s.1-11
DOI:
Cyfrowy identyfikator dokumentu elektronicznego (otwiera się w nowej karcie) 10.1061/(asce)su.1943-5428.0000284
Weryfikacja:
Politechnika Gdańska

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