Blar i NTNU Open på forfatter "Barros, Anne"
-
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 ... -
Optimization of periodic inspection time of sis subject to a regular proof testing
Srivastav, Himanshu; de Azevedo Vale, Guilherme; Barros, Anne; Lundteigen, Mary Ann; Pedersen, Frank Børre; Hafver, Andreas; Oliveira, Luiz F. (Chapter, 2018)Periodic testing is a method to ascertain the availability of Safety Instrumented Systems (SIS). These systems are generally passive and are activated only on demand. Testing is then required to diagnose their current state ... -
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 ... -
Piecewise Deterministic Markov Processes for Condition-based Maintenance Modelling: Applications to Critical Infrastructures
Torres, Renny José Arismendi (Doctoral theses at NTNU;2022:377, Doctoral thesis, 2022)This thesis focuses on Piecewise deterministic Markov process (PDMP), a general class of non-diffusion stochastic models, as a framework for modelling condition-based maintenance (CBM) decision problems of critical ... -
Predictive Maintenance and Battery Management for wireless sensors.
Shah, Sanjay (Master thesis, 2019)Wireless sensor networks (WSNs) becomes an emerging technology and has been adopted by several companies for data communication and processing. Many leading companies use wireless sensor’s network for different purposes. ... -
Predictive Maintenance for an Industrial Application - Contribution to Maintenance Modelling Utilizing Petri Nets with Predicates
Sigmundstad, Jone Nicolai (Master thesis, 2018)In the current industrial scenario, maintenance activities are recognized as a strategic issue. With the increasing demands of the maintenance organizations, maintenance policies have to ensure that physical assets will ... -
Production Availability Analysis: Implications on Modelling due to Subsea Conditions
Sun, Tianqi (Master thesis, 2017)Subsea production and processing systems have become a hot topic among research institutes and industries. While highlighting the advantages on production and economy, the reliability issues show a different picture with ... -
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 ... -
Prognostics and health management of safety-instrumented systems: approaches of degradation modeling and decision-making
Zhang, Aibo (Doctoral theses at NTNU;2021:36, Doctoral thesis, 2021)Modern industries are developing towards a high-integrated direction with overwhelming complexities bringing benefits and potential risks with catastrophic consequences simultaneously. To reduce the occurrences of undesired ... -
Prognostics and Maintenance Optimization in Bridge Management
Arismendi, Renny; Barros, Anne; Vatn, Jørn; Grall, Antoine (Chapter, 2019)This paper has been written in collaboration with the Norwegian Public Roads Administration (NPRA). In Norway, bridges are a vital part of the transportation infrastructure. With more than 18,000 road bridges across the ... -
Reliability assessment of subsea BOP control systems
Sætre, Øyvind (Master thesis, 2015)The subsea blowout preventer (BOP) and the BOP control system were the most important contributors to the Macondo accident in April 2010. A BOP is a large valve system used during the drilling phase; to seal, control, and ... -
Reliability assessment of subsea BOP shear ram preventers
Klingsheim, Jarand F (Master thesis, 2015)The objective of this report is to assess the reliability of blind shear rams (BSRs). The BSR's failure to seal off and secure the well in the Macondo incident proved the necessity of reevaluating the abilities of current ... -
Reliability Assessment of Subsea X-mas Tree Configurations
Wanvik, Petter Gullhav (Master thesis, 2015)The focus of this thesis is to provide input for choosing the optimal X-mas Tree (XT) configuration for a subsea production system. The subsea XT is used to direct, regulate, and stop the flow from a well. These functions ... -
Reliability of subsea blowout preventer systems - A study of the emergency disconnect function
Jonassen, Fredrik (Master thesis, 2015)The Deepwater Horizon accident in 2010 emphasizes the significance of safety in offshore drilling. The drilling rig was considered to be reliable and safe, but the blowout in the Gulf of Mexico costed eleven lives and the ... -
Reliability study of Subsea Control Module with focus on statistical methods
Bitanov, Askar (Master thesis, 2015)The importance of data in carrying out reliability analysis cannot be over emphasized. Failure rate is the basic input for reliability assessment. Therefore, identifying a realistic estimate helps to achieve accurate ... -
Reliability-based measures and prognostic analysis of a K-out-of-N system in random environments
Zhang, Nan; Fouladirad, Mitra; Barros, Anne (Journal article; Peer reviewed, 2018)In this paper, we study reliability based measures and prognostic problems of a K-out-of-N system in which the failure process of each component depends not only on its intrinsic characteristic but also on its operating ... -
Remaining Useful Life Time of Gas Compressor in Kollness Field
Putri, Mariska Septiana (Master thesis, 2017)This thesis contains information related to models that are established to calculate availability of a system using Markov process. The system that we study for this report is gas compressors that are operated by STATOIL ... -
Remaining Useful Lifetime Modeling of a Compressor System
Heimdal, Markus (Master thesis, 2017)The master thesis has the aim of predicting the remaining useful lifetime (RUL) for an aging compressor drive system (CDS). Several objectives where established to achieve the aim. Among them are a review of the aging ... -
A Risk Aspect of Periodic Testing on Pressure Relief Valves
Lee, Shenae; Barros, Anne; Lundteigen, Mary Ann; Paltrinieri, Nicola (Peer reviewed; Journal article, 2022)A pressure relief valve (PSV) is a key safety barrier to prevent the catastrophic rupture of pressure equipment in a process plant. The safety function of a PSV is to open and relieve the pressure when the equipment pressure ...