Blar i NTNU Open på forfatter "Rustad, Anne Marthine"
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Analysis and control of drilling riser dynamics in dual gradient drilling
Fossum, Trygve Olav (Master thesis, 2013)The aim of this thesis is to investigate a dual gradient riser system, adapted for operations in the Gulf of Mexico and subjected to first- and second-order wave forces, current and rig/vessel motion.Deep water drilling ... -
Dynamic Positioning in Extreme Sea States: Improving Operability Using Hybrid Design Methods
Brodtkorb, Astrid Helene (Master thesis, 2014)This thesis investigates the performance of high-level hybrid dynamic positioning (DP) algorithms in extreme environmental conditions. A vessel in DP uses the thrusters as the sole means of keeping position in wind, waves ... -
Modeling and Control of Top Tensioned Risers
Rustad, Anne Marthine (Doktoravhandlinger ved NTNU, 1503-8181; 2007:183, Doctoral thesis, 2007)This doctoral thesis presents new research results on the control of top tensioned risers in deep waters. The main motivation for this work is the development of a riser control system which control the top tension of the ... -
Modelling and Control of a Two-Body Offshore Wave Energy Converter - Evaluation of Passive Control Strategies
Schultz, Eirik (Master thesis, 2015)The main motivation behind this thesis is using the renewable resource of wave energy to solve two of the most important challenges for sustainability; energy and freshwater. The DynOcean is a two-body offshore wave energy ... -
Modelling and Control of Thruster Assisted Position Mooring System for a Semi-submersible: Analysis and Model Testing
Bjørneset, Solveig (Master thesis, 2014)For harsh weather, nonlinear effects dominate the dynamics to a larger extent than for calm weather. The low frequency dynamics of a moored vessel are excited by second order wave drift forces. To counteract the low-frequency ... -
Snaking Behavior of Umbilicals
Moheudden, Sharif Mohammad (Master thesis, 2014)Umbilical is a hardware element that connects the subsea systems to the top side systems of a floating production unit. During its manufacture, storage and installation, sometimes it shows behaviour like snake as found in ...