Degradation-based preventive maintenance policy for railway transport systems

Fateme Dinmohammadi, B. Alkali, M. Shafiee

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    34 Downloads (Pure)

    Abstract

    Railway transport maintenance plays an important role in delivering safe, reliable and competitive transport services. It also is one of the major costs for rail transport operations. According to several reports, the inspection and maintenance costs constitute a large portion of the life-cycle cost (LCC) for railway asset infrastructures (such as bridges, rail tracks, track beds and track equipment) and rolling stock components (e.g. chassis, bogies, wheels and wagons). In order to reduce the operating expenditure (OPEX) while maintaining high standards of safety, the asset managers must determine a planning period and find optimum preventive inspection policies for various railway systems, such that the total cost incurred over the life span is minimized and/or the rail network’s reliability is maximized. Common railway defects are caused by degradation processes such as rolling contact fatigue (RCF) or wear. The degradation of assets may result in substantial losses to the rail transport operators if it is not prevented in an efficient way. In this paper, we investigate an optimal age-dependent preventive inspection policy for railway assets subject to gradual degradation phenomena. The degradation processes initiate following
    Non-Homogenous Poisson Process (NHPP) and propagate according to gamma stochastic process. When the size of degradation reaches a critical level, the asset will unexpectedly fail and it has to undergo a corrective repair. This unexpected failure may also interrupt rail operations, cause passenger dissatisfaction or even some accidents like derailment or overturning. To avoid such undesired defects, the asset is preventively inspected at regular time intervals. The problem is to determine an optimal inspection time interval such that the long-run expected cost rate is minimized. The proposed model is applied to support maintenance decision-making for a railway asset on the Scottish rail network. The results show that the use of the proposed inspection policy allows a significant reduction of the maintenance cost compared to the strategy when only corrective repair is considered.
    Original languageEnglish
    Title of host publication30th International Congress & Exhibition on Condition COMADEM 2017
    Number of pages8
    Publication statusPublished - 31 Jul 2017

    Fingerprint

    Preventive maintenance
    Rails
    Degradation
    Inspection
    Railroad tracks
    Costs
    Repair
    Railroad rolling stock
    Bogies (railroad rolling stock)
    Derailments
    Defects
    Chassis
    Random processes
    Life cycle
    Wheels
    Accidents
    Managers
    Decision making
    Wear of materials
    Fatigue of materials

    Keywords

    • degradation
    • railway transport
    • maintenance

    Cite this

    Dinmohammadi, F., Alkali, B., & Shafiee, M. (2017). Degradation-based preventive maintenance policy for railway transport systems. In 30th International Congress & Exhibition on Condition COMADEM 2017
    Dinmohammadi, Fateme ; Alkali, B. ; Shafiee, M. / Degradation-based preventive maintenance policy for railway transport systems. 30th International Congress & Exhibition on Condition COMADEM 2017. 2017.
    @inproceedings{0e407dceaa8b4fabba72e9f4ac903b69,
    title = "Degradation-based preventive maintenance policy for railway transport systems",
    abstract = "Railway transport maintenance plays an important role in delivering safe, reliable and competitive transport services. It also is one of the major costs for rail transport operations. According to several reports, the inspection and maintenance costs constitute a large portion of the life-cycle cost (LCC) for railway asset infrastructures (such as bridges, rail tracks, track beds and track equipment) and rolling stock components (e.g. chassis, bogies, wheels and wagons). In order to reduce the operating expenditure (OPEX) while maintaining high standards of safety, the asset managers must determine a planning period and find optimum preventive inspection policies for various railway systems, such that the total cost incurred over the life span is minimized and/or the rail network’s reliability is maximized. Common railway defects are caused by degradation processes such as rolling contact fatigue (RCF) or wear. The degradation of assets may result in substantial losses to the rail transport operators if it is not prevented in an efficient way. In this paper, we investigate an optimal age-dependent preventive inspection policy for railway assets subject to gradual degradation phenomena. The degradation processes initiate followingNon-Homogenous Poisson Process (NHPP) and propagate according to gamma stochastic process. When the size of degradation reaches a critical level, the asset will unexpectedly fail and it has to undergo a corrective repair. This unexpected failure may also interrupt rail operations, cause passenger dissatisfaction or even some accidents like derailment or overturning. To avoid such undesired defects, the asset is preventively inspected at regular time intervals. The problem is to determine an optimal inspection time interval such that the long-run expected cost rate is minimized. The proposed model is applied to support maintenance decision-making for a railway asset on the Scottish rail network. The results show that the use of the proposed inspection policy allows a significant reduction of the maintenance cost compared to the strategy when only corrective repair is considered.",
    keywords = "degradation, railway transport, maintenance",
    author = "Fateme Dinmohammadi and B. Alkali and M. Shafiee",
    note = "Acceptance date from author in SAN AAM: temp embargo set while checking with publisher 27-10-17 Update: no response, made file open and notified publisher 20-8-18 Paper not found online; used end date of month of conference for pub. date",
    year = "2017",
    month = "7",
    day = "31",
    language = "English",
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    Dinmohammadi, F, Alkali, B & Shafiee, M 2017, Degradation-based preventive maintenance policy for railway transport systems. in 30th International Congress & Exhibition on Condition COMADEM 2017.

    Degradation-based preventive maintenance policy for railway transport systems. / Dinmohammadi, Fateme; Alkali, B.; Shafiee, M.

    30th International Congress & Exhibition on Condition COMADEM 2017. 2017.

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    TY - GEN

    T1 - Degradation-based preventive maintenance policy for railway transport systems

    AU - Dinmohammadi, Fateme

    AU - Alkali, B.

    AU - Shafiee, M.

    N1 - Acceptance date from author in SAN AAM: temp embargo set while checking with publisher 27-10-17 Update: no response, made file open and notified publisher 20-8-18 Paper not found online; used end date of month of conference for pub. date

    PY - 2017/7/31

    Y1 - 2017/7/31

    N2 - Railway transport maintenance plays an important role in delivering safe, reliable and competitive transport services. It also is one of the major costs for rail transport operations. According to several reports, the inspection and maintenance costs constitute a large portion of the life-cycle cost (LCC) for railway asset infrastructures (such as bridges, rail tracks, track beds and track equipment) and rolling stock components (e.g. chassis, bogies, wheels and wagons). In order to reduce the operating expenditure (OPEX) while maintaining high standards of safety, the asset managers must determine a planning period and find optimum preventive inspection policies for various railway systems, such that the total cost incurred over the life span is minimized and/or the rail network’s reliability is maximized. Common railway defects are caused by degradation processes such as rolling contact fatigue (RCF) or wear. The degradation of assets may result in substantial losses to the rail transport operators if it is not prevented in an efficient way. In this paper, we investigate an optimal age-dependent preventive inspection policy for railway assets subject to gradual degradation phenomena. The degradation processes initiate followingNon-Homogenous Poisson Process (NHPP) and propagate according to gamma stochastic process. When the size of degradation reaches a critical level, the asset will unexpectedly fail and it has to undergo a corrective repair. This unexpected failure may also interrupt rail operations, cause passenger dissatisfaction or even some accidents like derailment or overturning. To avoid such undesired defects, the asset is preventively inspected at regular time intervals. The problem is to determine an optimal inspection time interval such that the long-run expected cost rate is minimized. The proposed model is applied to support maintenance decision-making for a railway asset on the Scottish rail network. The results show that the use of the proposed inspection policy allows a significant reduction of the maintenance cost compared to the strategy when only corrective repair is considered.

    AB - Railway transport maintenance plays an important role in delivering safe, reliable and competitive transport services. It also is one of the major costs for rail transport operations. According to several reports, the inspection and maintenance costs constitute a large portion of the life-cycle cost (LCC) for railway asset infrastructures (such as bridges, rail tracks, track beds and track equipment) and rolling stock components (e.g. chassis, bogies, wheels and wagons). In order to reduce the operating expenditure (OPEX) while maintaining high standards of safety, the asset managers must determine a planning period and find optimum preventive inspection policies for various railway systems, such that the total cost incurred over the life span is minimized and/or the rail network’s reliability is maximized. Common railway defects are caused by degradation processes such as rolling contact fatigue (RCF) or wear. The degradation of assets may result in substantial losses to the rail transport operators if it is not prevented in an efficient way. In this paper, we investigate an optimal age-dependent preventive inspection policy for railway assets subject to gradual degradation phenomena. The degradation processes initiate followingNon-Homogenous Poisson Process (NHPP) and propagate according to gamma stochastic process. When the size of degradation reaches a critical level, the asset will unexpectedly fail and it has to undergo a corrective repair. This unexpected failure may also interrupt rail operations, cause passenger dissatisfaction or even some accidents like derailment or overturning. To avoid such undesired defects, the asset is preventively inspected at regular time intervals. The problem is to determine an optimal inspection time interval such that the long-run expected cost rate is minimized. The proposed model is applied to support maintenance decision-making for a railway asset on the Scottish rail network. The results show that the use of the proposed inspection policy allows a significant reduction of the maintenance cost compared to the strategy when only corrective repair is considered.

    KW - degradation

    KW - railway transport

    KW - maintenance

    M3 - Conference contribution

    BT - 30th International Congress & Exhibition on Condition COMADEM 2017

    ER -

    Dinmohammadi F, Alkali B, Shafiee M. Degradation-based preventive maintenance policy for railway transport systems. In 30th International Congress & Exhibition on Condition COMADEM 2017. 2017