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Mixed-effects model for reliability assessment of dump trucks in heterogeneous operating environment: A case study
Faculty of Engineering, Department of Mining Engineering, Tarbiat Modares University, Tehran, Iran.
Faculty of Engineering, Department of Mining Engineering, Tarbiat Modares University, Tehran, Iran.
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Operation, Maintenance and Acoustics.ORCID iD: 0000-0003-1377-8180
2022 (English)In: Quality and Reliability Engineering International, ISSN 0748-8017, E-ISSN 1099-1638, Vol. 38, no 5, p. 2881-2898Article in journal (Refereed) Published
Abstract [en]

Reliability of mining equipment is influenced by different operational and environmental risk factors. However, in practice, including all relevant factors in reliability analysis is not possible. Ignoring the risk factors leads to unobserved heterogeneity and biased estimation of reliability characteristics. This research proposes a semi-parametric mixed-effects model to assess the simultaneous effects of observed and unobserved risk factors on reliability. Furthermore, the model can be used for investigating inter-cluster dependency and variability. To illustrate the model, a comprehensive case study is presented using data from three mines in Iran. The results show that the model can address the effect of unobserved risk factors. Moreover, it is found that the hazard of dump trucks is significantly associated with operator skill, season and the elevation difference between dumping and loading points.

Place, publisher, year, edition, pages
John Wiley & Sons, 2022. Vol. 38, no 5, p. 2881-2898
Keywords [en]
frailty, heterogeneity, maintenance, mining, mixed-effects model, reliability, unobserved risk factor
National Category
Other Civil Engineering
Research subject
Operation and Maintenance
Identifiers
URN: urn:nbn:se:ltu:diva-89538DOI: 10.1002/qre.3079ISI: 000750203900001Scopus ID: 2-s2.0-85124145005OAI: oai:DiVA.org:ltu-89538DiVA, id: diva2:1644387
Note

Validerad;2022;Nivå 2;2022-08-19 (hanlid)

Available from: 2022-03-14 Created: 2022-03-14 Last updated: 2022-08-19Bibliographically approved

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Ghodrati, Behzad

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