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Wyszukujesz frazę "track degradation" wg kryterium: Temat


Wyświetlanie 1-2 z 2
Tytuł:
Assessment of railtrack geometry of Iddo – Mushin corridor Lagos region
Ocena geometrii torów kolejowych korytarza Iddo-Mushin w Lagos
Autorzy:
Adeaga, Olusegun
Dogbonjaye, Olaoluwa
Akinbaloye, Olutosin
Powiązania:
https://bibliotekanauki.pl/articles/2089706.pdf
Data publikacji:
2019
Wydawca:
Uniwersytet Gdański. Komisja Geografii Komunikacji Polskiego Towarzystwa Geograficznego
Tematy:
track geometry
track degradation
synthetic coefficient
safe speed
geometria toru
degradacja toru
współczynnik syntetyczny
prędkość bezpieczna
Opis:
Railway transport is a primary asset to trade, industry and commerce development of nations hat demand among others, a safe transit and optimal maintenance. Track performance remains an important index towards measuring track degradation. Thus, in this study the rail track geometry model was adopted to analyze the quality of Iddo – Mushin rail corridor towards safe rail transport system. Geometric parameters of interest include vertical irregularities, horizontal irregularities, cross-level, twist and track gauge. The parameters were calculated from a 3-dimensional data collected using Tachymetric Surveying approach covering Mushin, Yaba, Ebute-Meta and Iddo terminus. It should be noted that despite the high standard used as regards to the design and construction of the Iddo-Mushin rail track facilities, several derailments have occurred over time due to rail geometry deformation with high probability incidents along the Iddo – Ebute-Meta corridor. It was also discovered that the Iddo-Mushin axis can only permit average train speed of about 80 km/h, using the Polish Railway Synthetic Coefficient for safe rail transportation system. The synthetic assessment approach is simple and facilitate a continuous measurement of geometric parameters along railway track. Proper maintenance and upgrade of the rail track system mechanisms to support the incremental trasport demand and services as a result of socio-economic growth and development of Lagos mega city, is therefore suggested.
Źródło:
Prace Komisji Geografii Komunikacji PTG; 2019, 22(3); 21-30
1426-5915
2543-859X
Pojawia się w:
Prace Komisji Geografii Komunikacji PTG
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effective time interval for railway track geometry inspection
Autorzy:
Kasraei, Ahmad
Zakeri, Jabbar Ali
Powiązania:
https://bibliotekanauki.pl/articles/223850.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
track geometry
inspection interval
maintenance
degradation
maintenance cost
geometria toru
przeglądy
konserwacja
degradacja
koszty utrzymania
Opis:
A proper decision-making scheme for track geometry maintenance requires a knowledge of the real condition of track geometry. Therefore, the track must be inspected by measurement cars at different time intervals. The frequency of track geometry inspection plays a crucial role in decision-making and has always been a big concern for infrastructure managers. The inspection interval should be chosen properly, it means that the small period can decrease the capacity of line and affect the operation of network and the big period can result in low quality of track and in some cases derailments and possible loss of human lives. The aim of this paper is to determine the effective inspection interval such that the total maintenance cost is minimized. In the proposed cost model, the costs of inspection, preventive maintenance, corrective maintenance and the penalty for exceeding the corrective maintenance level are considered. A case study is performed on a real dataset collected from a railway line in Iran. The standard deviation of longitudinal level is considered to measure track geometry degradation. A widely applied linear model is used to model track geometry degradation over time. Monte Carlo technique is used to simulate the track geometry behavior under various track geometry inspection intervals. In addition, a set of sensitivity analyses are carried out to assess the effect of various inspection intervals on different terms of maintenance cost. The results indicate that not only can substantial costs be saved by setting effective inspection intervals, but also the time during which the track suffers from bad conditions is dramatically reduced. The result of this study has shown the appropriate inspection interval for the studied case can result in 13.6 percent decrease in maintenance cost in comparison with the current maintenance policy. Besides, it would lead to more reliable railway track by preventing the system exceed the corrective threshold.
Źródło:
Archives of Transport; 2020, 53, 1; 53-65
0866-9546
2300-8830
Pojawia się w:
Archives of Transport
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-2 z 2

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