Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Safety and availability evaluation of railway operation based on the state of signalling systems
A framework is presented to evaluate the safety and availability of the railway operation, and quantifying the probability of the signalling system not to supervise the railway traffic. Since a failure of the signalling systems still allows operation of the railway, it is not sufficient to study their effect on the railway operation by considering only the failures and delays. The safety and availability are evaluated, handling both repairs and replacements by using a Markov model. The model is verified with a case study of Swedish railway signalling systems with different scenarios. The results show that the probability of being in a state where operation is possible in a degraded mode is greater than the probability of not being operative at all, which reduces delays but requires other risk mitigation measures to ensure safe operation. The effects that different improvements can have on the safety and availability of the railway operation are simulated. The results show that combining maintenance improvements to reduce the failure rate and increase the repair rate is more efficient at increasing the probability of being in an operative state and reducing the probability of operating in a degraded state. ; Validerad; 2017; Nivå 2; 2017-02-06 (andbra)
Safety and availability evaluation of railway operation based on the state of signalling systems
A framework is presented to evaluate the safety and availability of the railway operation, and quantifying the probability of the signalling system not to supervise the railway traffic. Since a failure of the signalling systems still allows operation of the railway, it is not sufficient to study their effect on the railway operation by considering only the failures and delays. The safety and availability are evaluated, handling both repairs and replacements by using a Markov model. The model is verified with a case study of Swedish railway signalling systems with different scenarios. The results show that the probability of being in a state where operation is possible in a degraded mode is greater than the probability of not being operative at all, which reduces delays but requires other risk mitigation measures to ensure safe operation. The effects that different improvements can have on the safety and availability of the railway operation are simulated. The results show that combining maintenance improvements to reduce the failure rate and increase the repair rate is more efficient at increasing the probability of being in an operative state and reducing the probability of operating in a degraded state. ; Validerad; 2017; Nivå 2; 2017-02-06 (andbra)
Safety and availability evaluation of railway operation based on the state of signalling systems
Morant, Amparo (Autor:in) / Gustafson, Anna (Autor:in) / Söderholm, Peter (Autor:in) / Larsson-Kråik, Per-Olof (Autor:in) / Kumar, Uday (Autor:in)
01.01.2017
ISI:000394085100008
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Dependability and safety evaluation of railway signalling systems based on field data
| BASE | 2015
Safety concept of railway signalling based on Galileo Safety-of-Life Service
| British Library Conference Proceedings | 2008
| TIBKAT | 1963
STATE OF THE ART - SAFETY CASES - Planning safety into railway operation
Online Contents | 1995