Browsing Institutt for marin teknikk by Author "Dalheim, Øyvind Øksnes"
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Added Resistance and Speed Loss of a Ship Found Using Onboard Monitoring Data
Dalheim, Øyvind Øksnes; Steen, Sverre (Peer reviewed; Journal article, 2020)Prediction of the added resistance or corresponding speed loss in real sea conditions is essential to evaluate the performance of a ship. Assessment of the environmental impact on vessel performance is essential for route ... -
A computationally efficient method for identification of steady state in time series data from ship monitoring
Dalheim, Øyvind Øksnes; Steen, Sverre (Peer reviewed; Journal article, 2020)An increasing number of ships are being equipped with sensors and devices for monitoring of operational behavior, and the amount and access to operational data is gradually increasing. Due to various reasons described in ... -
Development of a Simulation Model for Propeller Performance
Dalheim, Øyvind Øksnes (Master thesis, 2015)The simulation model PropSiM for simulation of propeller performance has been developed and implemented into Simulink. The simulation model generates a time domain solution to the six degree of freedom propeller forces in ... -
Effect of change of propulsion system on M/S Midnatsol
Hasfjord, Nikolai (Master thesis, 2017)In 2016 the costal liner M/S Midnatsol had her main thruster system changed from the twin fixed pitch contrarotating thruster system Contaz to the twin controllable pitch Azipull thruster system. The purpose of this thesis ... -
Preparation of in-service measurement data for ship operation and performance analysis
Dalheim, Øyvind Øksnes; Steen, Sverre (Peer reviewed; Journal article, 2020)An increasing number of ships are being equipped with sensors and devices for monitoring of operational behavior, and the amount and access to operational data is gradually increasing. Due to various reasons described in ... -
Time Domain Modeling of Propeller Forces due to Ventilation in Static and Dynamic Conditions
Kozlowska, Anna Maria; Dalheim, Øyvind Øksnes; Savio, Luca; Steen, Sverre (Journal article; Peer reviewed, 2020)This paper presents experimental and theoretical studies on the dynamic effect on the propeller loading due to ventilation by using a simulation model that generates a time domain solution for propeller forces in varying ... -
Uncertainty in the real-time estimation of ship speed through water
Dalheim, Øyvind Øksnes; Steen, Sverre (Peer reviewed; Journal article, 2021)The ship speed through water (STW) is a critical variable for evaluation of ship performance. With a cubic relation to the expected shaft power, even small inaccuracies in measured STW amplifies to more considerable ...