Calculating the development of the thermal vertical stratification in the North Sea with a three-dimensional baroclinic circulation model

1996 ◽  
Vol 16 (2) ◽  
pp. 163-194 ◽  
Author(s):  
Thomas Pohlmann
Keyword(s):  
North Sea ◽  
Three Dimensional ◽  
Circulation Model ◽  
Vertical Stratification ◽  
The North ◽  
Baroclinic Circulation ◽  
The North Sea

Effects of wave-induced forcing on a circulation model of the North Sea

2016 ◽  
Vol 67 (1) ◽  
pp. 81-101 ◽  
Author(s):  
Joanna Staneva ◽  
Victor Alari ◽  
Øyvind Breivik ◽  
Jean-Raymond Bidlot ◽  
Kristian Mogensen
Keyword(s):  
North Sea ◽  
Circulation Model ◽  
The North ◽  
The North Sea ◽  
Wave Induced

A Methodology for DP Capability Studies on Remotely Operated Vehicles

2017 ◽  
Author(s):  
Juan A. Ramírez-Macías ◽  
Rafael E. Vásquez ◽  
Asgeir J. Sørensen ◽  
Svein Sævik
Keyword(s):  
North Sea ◽  
Three Dimensional ◽  
Dynamic Positioning ◽  
Remotely Operated Vehicles ◽  
Environmental Loads ◽  
The North ◽  
Surface Vessels ◽  
The North Sea ◽  
Position And Orientation ◽  
Surface Vessel

Dynamic Positioning (DP) capability studies are used to assess if a vessel has sufficient thrust capacity to withstand environmental loads while keeping its position and orientation at a specified set-point or path. These studies are usually performed on ships and other DP-controlled surface vessels; consequently, standards and procedures for these are widely known. In this work, a methodology for conducting a DP capability study for Remotely Operated Vehicles (ROV) is presented. Due to the nature of ROV operations, a DP capability study should include different features that are not common to surface vessels. In this case, an ROV connected to a surface vessel through a tether is considered. During operation, the tether is subject to varying current loads that are accumulated along the water column and transferred to the vehicle. Therefore, the ROVs thrusters must be able to withstand, in addition to its own drag, three-dimensional loads due to three-dimensional currents and umbilical-related loads. To illustrate the methodology, two case studies are considered: the DP capability of an ROV that has to operate in the Colombian Caribbean and an existing ROV operating in the North Sea.

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