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Stochastic model for the geometrical rail track degradation process in the Portuguese railway Northern Line

Title
Stochastic model for the geometrical rail track degradation process in the Portuguese railway Northern Line
Type
Article in International Scientific Journal
Year
2013
Authors
Cecília Vale
(Author)
FEUP
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Maria de Lurdes Simões
(Author)
FEUP
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Journal
Vol. 116
Pages: 91-98
ISSN: 0951-8320
Publisher: Elsevier
Indexing
Publicação em ISI Web of Science ISI Web of Science
Publicação em Scopus Scopus - 0 Citations
INSPEC
Scientific classification
FOS: Engineering and technology > Civil engineering
CORDIS: Technological sciences > Engineering > Civil engineering
Other information
Authenticus ID: P-004-ZR0
Abstract (EN): The geometrical track degradation is characterized by the evolution over time (or tonnage) of several parameters such as the longitudinal level, the alignment, the gauge, the twist and the cross level. Dynamic track inspections allow monitoring the track geometrical quality which is essential to ensure track availability and reliability, passenger safety and comfort and also energy efficiency. The track geometrical quality is guaranteed by performing condition-based maintenance and renewal actions during the life of the track and for that it is crucial to understand the geometrical track degradation process. In this paper, a stochastic model for characterizing the geometrical track degradation process over time is presented. The Portuguese railway Northern Line is adopted as a case-study and a statistic analysis is performed for different vehicle speed groups, in accordance with CEN [1]. The new contribution of this research is that the Dagum distribution, usually adopted for representing the income distribution, may represent the geometrical track degradation process in terms of the longitudinal level.
Language: English
Type (Professor's evaluation): Scientific
Contact: cvale@fe.up.pt
No. of pages: 8
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