Browsing NTNU Open by Author "Liu, Yiliu"
Now showing items 21-40 of 52
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A hybrid heuristic optimization of maintenance routing and scheduling for offshore wind farms
Fan, Dongming; Ren, Yi; Feng, Qiang; Zhu, Bingyu; Liu, Yiliu; Wang, Zili (Peer reviewed; Journal article, 2019)As the operation and maintenance (O&M) costs constitute a substantial portion of the overall life-cycle cost of offshore wind farms, routing, and scheduling of maintenance are very important for cost reduction. With the ... -
Hybrid Prognostic Model for Residual Useful Life Estimation of Degraded Equipment
Zhang, Jie (Master thesis, 2015)As the consequence of the more widely used complex systems, there has been a shift in maintenance strategy. The traditional corrective maintenance is gradually replaced by preventive maintenance or even more advanced ... -
Methodology for Identification of Dangerous Combinations of Output States of SIS
Dong, Yining (Master thesis, 2015)Many operations in process industry and other application sectors involve inherent risk due to different hazards. A safety-instrumented system (SIS) is installed to prevent development of a hazard to an accident or to ... -
Modelling hazardous event scenarios for decision support
Lee, Shenae; Liu, Yiliu; Paltrinieri, Nicola (Chapter, 2017)Quantitative risk analysis has been a successful tool to support decision-making related to the design of technical (safety) barriers. A quantitative risk model may comprise a combination of event trees and fault trees, ... -
Multi-phase reliability growth test planning for repairable products sold with a two-dimensional warranty
Wang, Yukun; Liu, Yiliu; Li, Xiaopeng; Chen, Junyan (Journal article; Peer reviewed, 2019)For products sold with a two-dimensional warranty policy, the warranty servicing cost can be reduced through reliability growth during development. This paper investigates a multi-phase reliability growth test program for ... -
New Importance Measures for Multistate Systems
Ahmed, Ahmed Awil Abdrahman (Master thesis, 2017)In this study, two new importance measures for multistate systems are introduced and evaluated. These new importance measures improve the existing performance-based importance measures by considering the contributions of ... -
NewModel for Reliability and Availability Assessment of Subsea BOP System - Challenges and Approaches for New Requirements
Zhang, Juntao (Master thesis, 2015)The blowout preventer system is acting the secondary safety barrier in a hydrocarbon well, where the drilling mud column is defined as the primary safety barrier. However, in pratical industry, there is a new demand for ... -
Operation-oriented reliability and availability evaluation for onboard high-speed train control system with dynamic Bayesian network
Jiang, Lei; Liu, Yiliu; Wang, Xiaomin; Lundteigen, Mary Ann (Journal article; Peer reviewed, 2018)The reliability and availability of the onboard high-speed train control system are important to guarantee operational efficiency and railway safety. Failures occurring in the onboard system may result in serious accidents. ... -
Operational data-driven prediction for failure rates of equipment in safety instrumented systems: A case study from the oil and gas industry
Xie, Lin; Håbrekke, Solfrid; Liu, Yiliu; Lundteigen, Mary Ann (Journal article; Peer reviewed, 2019)Safety instrumented systems are frequently deployed to reduce the risk associated with industrial activities, such as those in the oil and gas industry. A key requirement for safety-instrumented systems in standards like ... -
Optimal reliability growth program for repairable and warranted products
Liu, Yiliu; Wang, Yukun (Chapter, 2019)Considering a two-dimensional and non-renewing free repair warranty (NFRW) policy, this paper proposes a modified reliability growth model to support the decision making of the manufacturer on the choice of a reliability ... -
Optimization of maintenances following proof tests for the final element of a safety-instrumented system
Zhang, Aibo; Zhang, Tieling; Barros, Anne; Liu, Yiliu (Journal article; Peer reviewed, 2020)Safety-instrumented systems (SISs) have been widely installed to prevent accidental events and mitigate their consequences. Mechanical final elements of SISs often become vulnerable with time due to degradations, but the ... -
Performance analysis for subsea blind shear ram preventers subject to testing strategies
Wu, Shengnan; Zhang, Laibin; Barros, Anne; Zheng, Wenpei; Liu, Yiliu (Journal article; Peer reviewed, 2018)In a subsea blowout preventer system, a subsea blind shear ram preventer (BSRP) plays as a crucial safety barrier by cutting off the drill pipe and sealing the wellhead to prevent serious accidents. Testing and repairs of ... -
Performance analysis of redundant safety-instrumented systems subject to degradation and external demands
Zhang, Aibo; Barros, Anne; Liu, Yiliu (Journal article; Peer reviewed, 2019)Safety-instrumented systems (SISs) play a vital role in preventing hazardous events in the offshore facilities. Many of existing performance analysis of SISs are based on the constant failure rate assumption, which is ... -
Performance Assessment of Safety-instrumented Systems Subject to Cascading Failures in High-demand Mode
Xie, Lin; Lundteigen, Mary Ann; Liu, Yiliu; Kassa, Elias; Zhu, Shengyang (Chapter, 2019)Safety-instrumented systems are designed to act upon hazardous events and reinforce safety. IEC 61508 specifies two possible reliability measures of safety-instrumented systems: the average probability of failure on demand ... -
Prediction of failure rates for subsea equipment
Kumar, Ashutosh (Master thesis, 2016)Prediction of failure rate for new subsea equipment is a challenge in oil and gas industry mainly due to lack of relevant data and use of increasingly novel technologies. There is a lack of common guideline or framework ... -
Prediction of plant-specific failure rates
Huo, Shanshan (Master thesis, 2014)Reliability prediction plays a critical role in the reliability engineering process. It describes the process used to estimate the constant failure rate during the useful life of the system. For electronic components, the ... -
Preventive maintenance optimization for repairable products considering two-dimensional warranty and customer satisfaction
Wang, Yukun; Liu, Yiliu; Zhang, Aibo (Journal article; Peer reviewed, 2018)Customer satisfaction with a purchased product is closely related to the product performance within the warranty region and even the performance during the remainder of its useful life. Every satisfied customer may boost ... -
Prognostic and health management for safety barriers in infrastructures: opportunities and challenges
Zhang, Aibo; Liu, Yiliu; Barros, Anne; Wang, Yukun (Chapter, 2018)Different types of safety barriers are deployed in many infrastructures to reduce the occurrences of hazards, and protect people, environment and other assets in case the unexpected events have occurred and the capacity ... -
Proof-testing strategies induced by dangerous detected failures of safety-instrumented systems
Liu, Yiliu; Rausand, Marvin (Preprint; Journal article; Peer reviewed, 2015)Some dangerous failures of safety-instrumented systems (SISs) are detected almost immediately by diagnostic self-testing as dangerous detected (DD) failures, whereas other dangerous failures can only be detected by ... -
Reliability Analysis of Wireless Safety-Instrumented Systems
Sobhani, Soheil (Master thesis, 2015)Progressive development of wireless technology in recent years has enabled it to span its application to a wide verity of systems. Simple house hold monitoring and monitoring of a patient in a hospital gives two diverse ...