... Abstract This paper presents a study to collect and analyze position loss incidents on dynamically positioned (DP) mobile offshore drilling units (MODUs) on the Norwegian Continental Shelf (NCS). These MODUs are of DP class 3 according to the requirements from the Norwegian Petroleum Safety...

... Abstract To improve the performance of tracking control for dynamically positioned (DP) vessels, this paper presents the design and implementation of an adaptive robust backstepping controller without using model parameters in the presence of unknown time-varying disturbances. The bias radial...

... in such environments. This paper presents the development and initial validations of a simulation performance laboratory, SPLASH, for modelling complex ice, wave and current interactions with dynamic positioning (DP) platforms and marine autonomous surface ships (MASS). SPLASH has a modular architecture...

... in stationary Dynamic Positioning (DP) operation and icebreaking. The ice management performance depends on the thrust of the propeller, propeller wake angle and thickness of the ice. Various ice management experiments have been done both in full-scale and model tests to study and demonstrate IM capabilities...

... routes and of dynamic positioning. A design study is presented based on an initial design of two variants. The basic hull forms are compared in terms of required forces and moments for vessel motions. Simulations of hull forces are conducted using Reynolds-averaged Navier-Stokes (RANS) equations...

... Abstract A number of incidents of wave-induced loss of position for dynamically positioned semi-submersible under normal operating conditions have occurred in the Norwegian offshore sector in recent years. A study has been carried out to seek their cause. One hypothesis for the cause has been...

.... A case study is presented to illustrate the methodology and concept. It assesses the collision risk between a DP shuttle tanker and an FPSO during offshore loading operations. collision quantified risk assessment risk density dynamic positioning Proceedings of the ASME 2022 41st International...

... of Newfoundland Canada Newfoundland Canada St. John s, NL St. John s, NL ABSTRACT Keywords: Dynamic positioning, wind force, wave force, Numerical modelling of the Arctic ocean dynamics with current force, ice force, 3D wave models, 3D wave-current interaction models, real-time simulation capability is useful...

... Abstract Technical, operational and organization barrier elements related to the emergency disconnect on dynamically positioned mobile offshore drilling units on the Norwegian Continental Shelf are identified. Position loss scenarios are analyzed based on the published station-keeping incidents...

... incidents on shuttle tankers. A discussion is done on the slow reactions to changes in the weather conditions. In the last section I discuss needs for improvement. LEARNING FROM DYNAMIC POSITIONING EVENTS Arne Kvitrud Petroleum Safety Authority Norway (PSA) Professor Olav Hanssens vei 10 NO-4003...

... by the use of jack-up vessels with extendible legs. In order to dimension the vessel’s manoeuvring devices in the early design stage and to ensure a safe jack-up process for given environmental loads the dynamic positioning capability during the jacking including the influence of the legs has...

... in the final heading are verified for the zero yaw and zero sway strategies. These headings are also compared to the exact minimum power heading, obtained by an optimization procedure considering the DP thrust allocation. Dynamic Positioning Weathervaning Control Environmental Forces Zero Power...

... traction. The benefits of this control are shown when compared to the non cooperative control by means of a experimental setup with two DP vessels. Cooperative control Dynamic Positioning Consensus Control 1 Copyright © 2013 by ASME Experimental Results of Cooperative Control Applied to Multi...

... the concept design of an efficient and economic, fit for purpose installation vessel for tidal stream energy converters. The vessel has good dynamic positioning capabilities for operation in strong tidal currents thus broadening the operational window. The environmental impact of the vessel is reduced when...

... reference-point, not only points located the vessel bow. A fully non-linear dynamic simulator was then used to carry out a complete analysis of the controller. Dynamic Positioning Weathervaning Control Environmental Forces Zero Power Control 1 Copyright © 2012 by ASME A GENERAL APPROACH FOR DP...

... 01 11 2011 Many vessels use a Dynamic Positioning (DP) system that automatically controls vessel position and heading with its own propulsion system. The limiting environment in which a vessel can maintain heading and position under DP operation is typically shown in a capability plot...

... ”, funded by the Turkish Republic Ministry of Industry and Trade under contract number 00369.STZ.2009-1, which is started at 01/07/2009 and finalized at 31/01/2011. navigation offshore drilling offshore surveying dynamic positioning dynamic tracking geospatial information system 1 P...

... we can further distinguish between a hawser mooring (passive) or a dynamic positioned shuttle tanker (active). Experience suggests that the side-by-side operation is limited to relative benign metocean conditions, whereas a stern-to-bow arrangement allows for offloading in more severe sea states...

..., is addressed. The al work was carried out using the wave tank and motion carriage facility in the Department of Engineering at University College London. DS: thruster, dynamic positioning, dp, flow work vessel, azimuthing LATURE opeller diameter excluding duct [m] uster c/l to hull base distance [m] tance...

... Dynamic Positioning Shuttle Tanker The increase of the offshore deep water production activities in Brazil based on the growth of the FPSO/FSO fleet, became the offloading operations a critical issue related to the possibilities of platform downtime. In order to improve the actual...