Handbook of RAMS in Railway Systems

Mahboob, Qamar; Zio, Enrico

doi:10.1201/b21983

Cited by 28 publications

(6 citation statements)

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“…The main benefit of maintainability analysis is dedicating how long it will take to complete various maintenance tasks. Hierarchically, maintenance is seen as a combination of all technical and administrative actions, including supervisory actions intended to maintain or restore a component or system to a state where it can perform what is required according to its primary function [29]. In Figure 6, we can see the maintenance hierarchy into two broad categories: preventive maintenance, where maintenance operations occur before failure, and corrective maintenance, where maintenance operations occur after failure.…”

Section: Maintainabilitymentioning

confidence: 99%

Optimization of Railway Infrastructure Asset – A Review

Maulana,

Gunawan

2023

JPI

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Railway infrastructure assets are key components in the railway transportation system. Optimal asset management is essential to improve the efficiency and productivity of the railway system, as well as help prevent unnecessary costs in the asset life cycle. Reliability, Availability, Maintainability, and Safety (RAMS) and Life Cycle Cost (LCC) methods can be used in managing railway infrastructure assets. RAMS is a method used to assess the performance of high-complexity systems such as rail infrastructure systems. In contrast, LCC is used to evaluate the overall cost of a system or asset over the life cycle. Integrating RAMS and LCC concepts can help plan railways' design, operation, and maintenance. This integration is very flexible as it can be done from the life cycle's design, operation, and maintenance stages. Research shows that using the integration of RAMS and LCC can lead to better strategic decisions in the life cycle of a railway. In selecting assets to support design and maintenance, for example, there are two high-speed rail double-track alternatives of ballasted and ballastless track, with results showing that ballastless track has higher RAMS performance and lower maintenance cost but higher construction costs, so ballasted track solutions are preferred for short-term construction and the ballastless track is preferred for long-term.

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Section: Maintainabilitymentioning

confidence: 99%

Optimization of Railway Infrastructure Asset – A Review

Maulana,

Gunawan

2023

JPI

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“…An RBD decomposes a system into its independent components and shows the logical connections needed for the successful operation of the system [3][4][5]44,45]. The basic assumptions of the RBD methodology are the following ones:…”

Section: Reliability Block Diagramsmentioning

confidence: 99%

“…• Combinatorial models: they allow to efficiently evaluate reliability under the strong assumption of statistically independent components [3,4]. These models include Reliability Block Diagrams (RBDs) [5,6], Fault Trees (FTs) [7,8], Reliability Graphs (RGs) [9,10] and Fault Trees with Repeated Events (FTREs) [8,11].…”

Section: Introductionmentioning

confidence: 99%

“…These models include Reliability Block Diagrams (RBDs) [5,6], Fault Trees (FTs) [7,8], Reliability Graphs (RGs) [9,10] and Fault Trees with Repeated Events (FTREs) [8,11]. • State-space based models: they allow for the modeling of several dependencies among failures, including statistical, time and space dependency, at the cost of a difficult tractability due to the state-space explosion [3,4]. These models include Continuous Time Markov Chains (CTMCs) [12,13], Stochastic Petri Nets (SPNs), Generalized Stochastic Petri Nets (GSPNs) and Stochastic Time Petri Nets (STPNs) [14][15][16][17], Stochastic Reward Nets (SRNs) [18,19] and Stochastic Activity Networks (SANs) [20,21].…”

Section: Introductionmentioning

confidence: 99%

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An Efficient Library for Reliability Block Diagram Evaluation

et al. 2021

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Reliability Block Diagrams (RBDs) are widely used in reliability engineering to model how the system reliability depends on the reliability of components or subsystems. In this paper, we present librbd, a C library providing a generic, efficient and open-source solution for time-dependent reliability evaluation of RBDs. The library has been developed as a part of a project for reliability evaluation of complex systems through a layered approach, combining different modeling formalisms and solution techniques at different system levels. The library achieves accuracy and efficiency comparable to, and mostly better than, those of other well-established tools, and it is well designed so that it can be easily used by other libraries and tools.

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“…Therefore, the way to improve the availability with more frequent scheduled inspections of crossings is inacceptable due to the explosion of already high inspection costs. The transition from the scheduled maintenance to the preventive or predictive maintenance with the concept of prognostics and health management (PHM), is increasingly taking place in the railway companies [8]. A growing number of national and international projects and publications confirm the interest of industry and researchers in the development of railway infrastructure PHM.…”

Section: Vol 15 Issue 2/2019 101-114mentioning

confidence: 99%

Multifractal Analysis of the Common Crossing Track-Side Measurements

Sysyn

Ižvolt

Nabochenko

et al. 2019

Civil and Environmental Engineering

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The deterioration common crossing elements increase the need for the maintenance of crossings and significantly reduce the reliability, availability and safety of railway traffic. The present paper introduces the results of experimental investigation of common crossing monitoring while its deterioration during the lifecycle of crossing. The conventional methods of common crossing condition estimation with time-based features like maximal accelerations, etc. are low appropriate as statistically significant condition indicators. The proposed multifractal analysis enables to extract the significant features from acceleration measurements. The extracted features are fused together with information about the train velocities and longitudinal position of wheels impact with the Lasso regularisation and multivariate linear regression. A ranking of feature importance is done and the redundant features are identified. The developed condition indicator has good correlation to the crossing lifetime and is simple for interpretation.

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Handbook of RAMS in Railway Systems

Cited by 28 publications

References 0 publications

Optimization of Railway Infrastructure Asset – A Review

Optimization of Railway Infrastructure Asset – A Review

An Efficient Library for Reliability Block Diagram Evaluation

Multifractal Analysis of the Common Crossing Track-Side Measurements

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