Reliability, availability and maintainability analysis of the conveyor system in mechanized tunneling

Ahmadi, Saleh; Moosazadeh, Sayfoddin; Hajihassani, Mohsen; Moomivand, Hassan; Rajaei, M.M.

doi:10.1016/j.measurement.2019.06.009

Cited by 36 publications

(20 citation statements)

References 10 publications

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“…Peng et al proposed two new importance measures for systems with S-independent degrading components and with S-correlated degrading components considering the continuously changing status of the degrading components and the correlation between components [35]. Ahmadi et al evaluated the reliability, availability, and maintainability of the tunneling equipment and analyzed the material hauling system in an earth pressure balance tunnel boring machine [36]. Proper importance measures can help to identify design weakness or operation bottlenecks, conduct optimal modifications for system upgrades and maintenance, and provide information about the importance of components on the system performance, which includes reliability, availability, productivity, safety, and detectability [37].…”

Section: Review Of Importance Measures For Binary and Multistate Systemsmentioning

confidence: 99%

Reliability Importance Measures considering Performance and Costs of Mechanical Hydraulic System for Hydraulic Excavators

et al. 2022

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Although some reliability importance measures and maintenance policies for mechanical products exist in literature, they are rarely investigated with reference to weakest component identification in the design stage and preventive maintenance interval during the life cycle. This paper is mainly study reliability importance measures considering performance and costs (RIMPC) of maintenance and downtime of the mechanical hydraulic system (MHS) for hydraulic excavators (HE) with energy regeneration and recovery system (ERRS) and suggests the scheduled maintenance interval for key components and the system itself based on the reliability R i t . In the research, the required failure data for reliability analysis is collected from maintenance crews and users over three years of a certain type of hydraulic excavators. Minitab is used for probable distribution estimation of the mechanical hydraulic system failure times, and the model is verified to obey Weibull distribution. RIMPC is calculated by multiplying the reliability R i t and weighting factor W i and then compared with other classical importance measures. The purpose of this paper is to identify the weakest component for MHS in the design stage and to make appropriate maintenance strategies which help to maintain a high reliability level for MHS. The proposed method also provides the scientific maintenance suggestion for improving the MHS reliability of the HE reasonably, which is efficient, profitable, and organized.

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Section: Review Of Importance Measures For Binary and Multistate Systemsmentioning

confidence: 99%

Reliability Importance Measures considering Performance and Costs of Mechanical Hydraulic System for Hydraulic Excavators

et al. 2022

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“…The advantages of the mechanized tunnels have been well reflected during the construction of urban metro tunnels, as fewer construction geohazards have been reported in mechanized urban metro tunnels compared to mountain tunnels. The increasing of mechanization and automation in tunneling equipments over the recent decades has highlighted the importance of acquiring reliable tunneling systems (Ahmadi et al 2019). However, attempts from academic research aspect to improve applicability and reasonable allocation of these equipments should be further carried out.…”

Section: Attempts To Strengthen Scientific Researchmentioning

confidence: 99%

Geohazards, reflection and challenges in Mountain tunnel construction of China: a data collection from 2002 to 2018

Wang

Lai

Qiu

et al. 2020

Geomatics, Natural Hazards and Risk

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In face of the complicated and changing geological conditions, safety issue is always a primary concern during the construction phase of tunnel in the mountainous regions of China. This Express Letter reports data collection concerning the geo-hazardous events recorded in tunnel system in the period from 2002 to 2018. These accidents include collapse, water inrush, gas explosion, portal landslide, suffocation and avalanche. A total of 97 geohazard events resulted in 393 deaths, 467 injuries and 51 missing. Statistical results indicate that collapse is the primary geohazard in mountain tunnel construction. The data confirmed a high correlation between the number of casualties and geohazard accidents quantity. It is also observed that water inrush is more likely to happen in karst region, while the collapse is mainly recorded in loess and karst areas. During the period under the review, the data illustrates an overall decrease of casualties and geohazard events, but it still faces a grim situation regarding the geohazard prevention in mountain tunnels construction of China. Hence, countermeasures and future research attempts focusing on geohazards prevention and mitigation are recommended.

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“…HST as public transportation must be able to maintain service quality by minimizing the occurrence of undesirable disturbances such as internal factors and external factors. The study of service quality reviewed from the perspective of reliability is expected to increase trust for the industry to deliver products to operators, which ultimately increases customer satisfaction [7].…”

Section: Introductionmentioning

confidence: 99%

Reliability Analysis on the Bogie System at Indonesian High-Speed Trains in the Design Phase to Improve Service Quality

Warjito,

Ansori,

Shalahuddin

et al. 2023

Majalah Ilmiah Pengkajian Industri

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High-speed train (HST) Indonesia is rail-based public transportation which is planned to be implemented in Jakarta - Surabaya. To maintain the HST for excellence service, it is necessary to conduct a study on the quality of the service. This paper tries to approach the Bogie system quality service from the reliability perspective in the design phase. The steps taken to maintain continuity of service quality are to identify critical sub-systems/components that affect the decline in reliability, Risk Analysis, build Reliability Block Diagram (RBD) from sub-system/components that have been identified in the bogie system, calculate initial reliability based on RBD, develop designs to minimize the potential for a decline in reliability, and compile procedure for evaluating and re-calculation the value for the reliability of the bogie system. Reliability is targeted at 0.9, which means that all service quality designs must always make the reliability value above the target. This paper is expected to provide an overview of potential that may occur based on predictions of decreasing reliability values until the operating period ends. So that anticipation of minimizing the decline in the value of reliability can be done. Keywords: high-speed train; bogie system; reliability; quality of service

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Reliability, availability and maintainability analysis of the conveyor system in mechanized tunneling

Cited by 36 publications

References 10 publications

Reliability Importance Measures considering Performance and Costs of Mechanical Hydraulic System for Hydraulic Excavators

Reliability Importance Measures considering Performance and Costs of Mechanical Hydraulic System for Hydraulic Excavators

Geohazards, reflection and challenges in Mountain tunnel construction of China: a data collection from 2002 to 2018

Reliability Analysis on the Bogie System at Indonesian High-Speed Trains in the Design Phase to Improve Service Quality

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