Forthcoming and Online First Articles

International Journal of Reliability and Safety

International Journal of Reliability and Safety (IJRS)

Forthcoming articles have been peer-reviewed and accepted for publication but are pending final changes, are not yet published and may not appear here in their final order of publication until they are assigned to issues. Therefore, the content conforms to our standards but the presentation (e.g. typesetting and proof-reading) is not necessarily up to the Inderscience standard. Additionally, titles, authors, abstracts and keywords may change before publication. Articles will not be published until the final proofs are validated by their authors.

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International Journal of Reliability and Safety (3 papers in press)

Regular Issues

  • Pre-chamber spark ignition: a reliability analysis of pre-chamber valve functions   Order a copy of this article
    by Faraz Akbar, Sarah Zaki 
    Abstract: A pre-chamber ignition allows spark-ignition engines to operate in lean air-fuel settings. It improves fuel efficiency and reduces emissions. In this study, a reliability analysis of a single GE Jenbacher J620 natural gas engine was done. It was operational on continuous load in the power generation sector in Karachi, Pakistan. A bathtub curve of the GE J620 pre-chamber gas valve (PCV) was generated. The three-year industrial data comprised PCV failures that occurred between two overhauls. During infant mortality, the curve revealed 7 failures during 1000 hours. This decreased to a failure for the next two cycles of thousand hours each. There was a 40% decrease in reliability after 1500 hours. Exponential distribution revealed that the mean time-to-failure (MTTF) was 545.5 hours. This study was the first of its kind in the facility. Previously, much time was lost in breakdown maintenance. Thus, it helped to increase the systems reliability.
    Keywords: bathtub curve; exponential distribution; failure rate; fuel injection; gas engine; pre-chamber combustion; pre-chamber spark ignition; pre-chamber valve; probability density function; reliability.

  • Availability optimisation and selection of performance parameters of complex repairable system using PSO   Order a copy of this article
    by Ajay Kumar, Devender Singh Punia 
    Abstract: This research paper presents a numerical technique for the computation of availability and reliability metrics as well as the Mean Time Between Failures (MTBF), pertaining to a thread rolling machine. Seven repaired subsystems are studied under this system, namely: motor, hopper feeder, fix die block, movable die block, drive belt, coolant and lubricant unit, and control panel are arranged in order. The performance of system considered is analyzed based on the Markov approach and assumes that the Failure and repair rate (FRR) of each subsystem follows a normal distribution. The decision support system is developed for achieving the maximum availability of system. The comparison between PSO optimisation and the Markov process is done to achieve optimum availability. The results are compared with other optimisation approaches and the optimised availability using PSO is calculated as 96.24% while it is 95.08% using the Markov method. The particle swarm optimisation algorithm sustains a wide range of different component performance indicators for optimising system availability goals as well as various performance parameters.
    Keywords: availability; steady state analysis; particle swarm optimisation; reliability; transient state analysis; mean time between failure; failure and repair rates.
    DOI: 10.1504/IJRS.2024.10067807
     
  • Key factors of near miss reporting behaviour at work and the interaction of safety climate: a review based on reciprocal safety model   Order a copy of this article
    by Hui Hui Tay 
    Abstract: Near misses share with safety accidents their origin but with no or reduced impact, thus providing organisations with the prediction of workplace accidents without experiencing actual cost and harmful consequences. Despite the effort to make near miss reporting a mandatory requirement, the issue of near miss under-reporting remains. Extant literature examines the key factors of near miss reporting behaviour as independent determinants, without considering the interaction of these factors and, more importantly, the interaction with the safety climate in the workplace. In the reciprocal safety culture model, safety behaviour is found to reciprocate with personal and organisational factors. This paper examines the key factors of near miss reporting and its interaction with safety climate through study review, and discusses the reciprocal relationship of near miss reporting behaviour. The study findings shall serve as reference for safety researchers and practitioners for effective near miss management system and training development.
    Keywords: near miss reporting; near miss management; workplace accidents prevention; safety behaviour; reciprocal safety culture; organisational safety climate; psychological safety climate.
    DOI: 10.1504/IJRS.2024.10067907
     

 

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