Browsing Institutt for maskinteknikk og produksjon by Title
Now showing items 33-52 of 3975
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A comprehensive numerical investigation of the impact behaviour of an offshore wind turbine blade due to impact loads during installation
(Journal article, 2019)For installing offshore wind turbines into deep waters, use of floating crane vessels is essential. One of the major challenges is their sensitivity to wave-induced vessel and crane tip motions, which can cause the impact ... -
A computational approach to expose conversation dynamics in engineering design activities
(Journal article, 2017)In this paper, we apply a computational approach to expose conversation dynamics in design conversations. We apply this approach to a case study comprising of two sessions, with 300 speaker turns respectively. The resulting ... -
A contribution to reliability assessment of safety-instrumented systems
(Doktoravhandlinger ved NTNU, 1503-8181; 2013:254, Doctoral thesis, 2013)Safety-instrumented systems (SISs) are among the most important and effective safety barriers in reducing the likelihood of hazardous events and/or mitigate their consequences to assets (humans, environment, and material ... -
A contribution to reliability qualification of new technical equipment: – with focus on subsea production equipment
(Doktoravhandlinger ved NTNU, 1503-8181; 2013:334, Doctoral thesis, 2013)This PhD thesis proposes new frameworks and methods which give new insights to qualification and reliability assessments of new subsea systems. The subsea oil and gas industry is an industry with strict requirements to the ... -
A Control System for Autonomous Vehicles - Three-Dimensional Geometric Models from Pictures
(Master thesis, 2017)This master's thesis describes an experimental process of recreating geometric models from images. This process is thoroughly described using functionality already present in the geometric modelling tool GeoMod and ... -
A cooperative information system framework to support process management
(Doktoravhandlinger ved NTNU, 1503-8181; 122, Doctoral thesis, 2002)The implementation of process orientation at Aker Verdal was enhanced by a cooperative information system (CIS) that supported process management with the right information, at the right time, at the right place, etc. A ... -
A coupled diffusion and cohesive zone modelling approach for numerically assessing hydrogen embrittlement of steel structures
(Journal article; Peer reviewed, 2017)Simulation of hydrogen embrittlement requires a coupled approach; on one side, the models describing hydrogen transport must account for local mechanical fields, while on the other side, the effect of hydrogen on the ... -
A Curvature-Based Descriptor for Point Cloud Alignment Using Conformal Geometric Algebra
(Journal article; Peer reviewed, 2018)This paper presents a descriptor for course alignment of point clouds using conformal geometric algebra. The method is based on selecting keypoints depending on shape factors to identify distinct features of the object ... -
A Data-Driven Approach for Fault Classification of a Manufacturing Process
(Master thesis, 2022)Fault diagnosis is among the most crucial steps in maintenance strategies to sustain the health of machine tools. Traditionally, fault diagnosis was performed based on engineers' vast expertise and technical understanding. ... -
A data-driven approach to improve control room operators' response
(Peer reviewed; Journal article, 2021) -
A data-driven method based on deep belief networks for backlash error prediction in machining centers
(Journal article; Peer reviewed, 2017)Backlash error occurs in a machining center may lead to a series of changes in the geometry of the components and subsequently deteriorate the overall performance of the equipment. Due to the uncertainty of mechanical wear ... -
A DBN-based risk assessment model for prediction and diagnosis of offshore drilling incidents
(Journal article; Peer reviewed, 2016)Drilling operations of offshore oil and gas fields are characterized by high technical complexity, high risks, and high costs, since they are always in harsh environments with complicated geological factors. Lost circulation ... -
A DBN-based risk assessment model for prediction and diagnosis of offshore drilling incidents
(Journal article, 2016)Drilling operations of offshore oil and gas fields are characterized by high technical complexity, high risks, and high costs, since they are always in harsh environments with complicated geological factors. Lost circulation ... -
A deep learning approach for anomaly detection based on SAE and LSTM in mechanical equipment
(Journal article; Peer reviewed, 2019)Anomaly in mechanical systems may cause equipment to break down with serious safety, environment, and economic impact. Since many mechanical equipment usually operates under tough working environments, which makes them ... -
A Degrading Element of Safety-instrumented Systems with Combined Maintenance Strategy
(Chapter, 2019)Safety-instrumented systems (SISs) are widely used to prevent hazardous events. The mechanical actuator subsystem in a SIS can become more vulnerable with time due to progressive degradation mechanisms, such as erosion, ... -
A diagram for capturing and predicting failure locations in notch geometries produced by additive manufacturing
(Journal article; Peer reviewed, 2020)In a recent work by the authors Solberg and Berto (2019), as-built notch geometries of Inconel 718 produced by selective laser melting was investigated under fatigue loading. One of the findings was that fatigue did not ... -
A Digital Product-Offering Platform in Construction Supply Chains: An Exploratory Study of the Potential Effects on a Pipe Manufacturer’s Business Model
(Master thesis, 2019)En digital produktplattform for bygg- og anleggsnæringen er under vurdering for å forbedre synlighet og koordinasjon i en verdikjede mellom rørprodusent og entreprenør på anleggsprosjekt. Formålet med denne masteroppgaven ... -
A dynamic Bayesian network approach for prognosis computations on discrete state systems
(Journal article, 2017)The maintenance optimization of complex systems is a key question. One important objective is to be able to anticipate future maintenance actions required to optimize the logistic and future investments. That is why, over ... -
A Fatigue Assessment Methodology for Notched Components Containing Defects
(Doktoravhandlinger ved NTNU, 1503-8181; 2007:224, Doctoral thesis, 2007)A probabilistic fatigue assessment tool, P•FAT, directly applicable to the results from a standard finite element stress analysis has been developed. The fatigue assessment tool consist of two deterministic fatigue assessment ... -
A Finite Element Tool for Investigation of Vortex-Induced Vibration of Marine Risers
(Master thesis, 2014)Vortex-induced vibration (VIV) is a major design issue for all deep-water riser systemsoperating in regions where severe sea currents can be expected. This highly complexphenomenon has resulted in a great deal of experimental ...