Blar i Institutt for marin teknikk på tidsskrift "Reliability Engineering & System Safety"
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A Bayesian approach to risk modeling of autonomous subsea intervention operations
(Journal article; Peer reviewed, 2018)The introduction of autonomy in subsea operations may affect operational risk related to Inspection, Maintenance, and Repair (IMR). This article proposes a Bayesian Belief Network (BBN) to model the risk affecting autonomous ... -
A Bayesian network risk model for predicting ship besetting in ice during convoy operations along the Northern Sea Route
(Journal article; Peer reviewed, 2022)To facilitate shipping in ice and to meet the increasing requirements of icebreaker services, convoy operations are the most effective alternative. However, convoy operations are among the most dangerous operations as they ... -
Complex accident scenarios modelled and analysed by Stochastic Petri Nets
(Journal article; Peer reviewed, 2015)This paper is focused on the usage of Petri nets for an effective modelling and simulation of complicated accident scenarios, where an order of events can vary and some events may occur anywhere in an event chain. These ... -
Data driven approach to risk management and decision support for dynamic positioning systems
(Peer reviewed; Journal article, 2020)Offshore oil and gas operations are inherently associated with risk and may have catastrophic consequences to life, property, and environment. Risk management is thus performed during the design, planning, and operation ... -
Deriving Verification Objectives and Scenarios for Maritime Systems Using the Systems-Theoretic Process Analysis
(Journal article; Peer reviewed, 2018)The process applied for verification of maritime systems lacks the ability to properly examine complex networks of interconnections. Verification is mainly focused on single failures of components, not properly accounting ... -
Effect of environmental modelling and inspection strategy on the optimal design of floating wind turbines
(Peer reviewed; Journal article, 2021)In order to reduce design conservatism and consequently the cost of energy, appropriate and cost-optimal safety factors should be derived, in light of environmental load uncertainties and lifetime costs. In the present ... -
Fatigue reliability assessment of offshore wind turbines with stochastic availability
(Journal article; Peer reviewed, 2019)In this paper, the impact on lifetime estimation of an offshore wind turbine by introducing a stochastic model for the availability is investigated. Offshore bottom-fixed wind turbines typically have an average downtime ... -
Human Reliability and the Impact of Control Function Allocation in the Design of Dynamic Positioning Systems
(Journal article; Peer reviewed, 2019)The design and function allocation of control in complex technological systems have mainly been technology-driven, resulting in increased automation. A human or user perspective is rarely taken in the technological ... -
Human-system concurrent task analysis for maritime autonomous surface ship operation and safety
(Journal article; Peer reviewed, 2019)Maritime Autonomous Surface Ships (MASS) are the subject of a diversity of projects and some are in testing phase. MASS will probably include operators working in a shore control center (SCC), whose responsibilities may ... -
Incorporating software failure in risk analysis – Part 1: Software functional failure mode classification
(Peer reviewed; Journal article, 2020)Advanced technological systems consist of a combination of hardware and software, and they are often operated or supervised by a human operator. Failures in software-intensive systems may be difficult to identify, analyze, ... -
Incorporating software failure in risk analysis––Part 2: Risk modeling process and case study
(Journal article; Peer reviewed, 2020)The advent of autonomous cars, drones, and ships, the complexity of these systems is increasing, challenging risk analysis and risk mitigation, since the incorporation of software failures intro traditional risk analysis ... -
Operational limits for aquaculture operations from a risk and safety perspective
(Peer reviewed; Journal article, 2020)Current decision making regarding whether to abort a high-risk aquaculture operation in a Norwegian fish farm is mainly experience-driven. The on-site personnel decides whether to start/delay/abort operations primarily ... -
An RCM approach for assessing reliability challenges and maintenance needs of unmanned cargo ships
(Peer reviewed; Journal article, 2021)Unmanned autonomous cargo ships may change the maritime industry, but there are issues regarding reliability and maintenance of machinery equipment that are yet to be solved. This article examines the applicability of the ... -
Remaining useful life predictions for turbofan engine degradation using semi-supervised deep architecture
(Journal article; Peer reviewed, 2018)In recent years, research has proposed several deep learning (DL) approaches to providing reliable remaining useful life (RUL) predictions in Prognostics and Health Management (PHM) applications. Although supervised DL ... -
Risk of collision between service vessels and offshore wind turbines
(Journal article; Peer reviewed, 2013)Offshore wind farms are growing in size and are situated farther and farther away from shore. The demand for service visits to transfer personnel and equipment to the wind turbines is increasing, and safe operation of the ... -
Safety performance monitoring of autonomous marine systems
(Journal article; Peer reviewed, 2017-03)The marine environment is vast, harsh, and challenging. Unanticipated faults and events might lead to loss of vessels, transported goods, collected scientific data, and business reputation. Hence, systems have to be in ... -
Supervised Dynamic Probabilistic Risk Assessment of Complex Systems, Part 1: General Overview
(Peer reviewed; Journal article, 2021)Dynamic probabilistic risk assessment (DPRA) is a systematic and comprehensive methodology that has been used and refined over the past decades to evaluate risks associated with complex systems. However, current approaches ... -
Supervised dynamic probabilistic risk assessment of complex systems, part 2: Application to risk-informed decision making, practice and results
(Peer reviewed; Journal article, 2021)One challenge that has received attention in maritime industry is assessing the risk level of dynamic positioning (DP) systems in emergency situations. Statistics from recent years have shown that the risk level of some ... -
Supervised dynamic probabilistic risk assessment: Review and comparison of methods
(Peer reviewed; Journal article, 2022)With the adoption of autonomous systems in higher levels of autonomy, large-scale, complex and dynamic systems are becoming commonplace. Ensuring safe operation of safety-critical autonomous systems is paramount, typically ... -
Towards supervisory risk control of autonomous ships
(Peer reviewed; Journal article, 2020)The objective of this paper is to outline a framework for online risk modelling for autonomous ships. There is a clear trend towards increased autonomy and intelligence in ships because it enables new functionality, as ...