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.
|Title of host publication||Ocean Engineering|
|Publisher||American Society of Mechanical Engineers (ASME)|
|State||Published - 2017|
|Event||ASME 2017 36th International Conference on Ocean, Offshore and Arctic Engineering, OMAE 2017 - Trondheim, Norway|
Duration: 25 Jun 2017 → 30 Jun 2017
|Name||Proceedings of the International Conference on Offshore Mechanics and Arctic Engineering - OMAE|
|Conference||ASME 2017 36th International Conference on Ocean, Offshore and Arctic Engineering, OMAE 2017|
|Period||25/06/17 → 30/06/17|
Bibliographical noteFunding Information:
This work was developed with the funding of the Fondo Na-cional de Financiamiento para la Ciencia, la Tecnología y la In-novación, Francisco José de Caldas; the Colombian petroleum company, ECOPETROL; the Universidad Pontificia Bolivariana -Medellín, UPB; the Universidad Nacional de Colombia - Sede Medellín, UNALMED; through the Strategic Program for the Development of Robotic Technology for Offshore Exploration of the Colombian Seabed, project 1210–531–30550, contract 0265– 2013. This work was also partly supported by the Research Council of Norway through the Centres of Excellence funding scheme, project number 223254—AMOS. The authors thank to the Norwegian University of Science and Technology’s Centre for Autonomous Marine Operations and Systems for Juan A. Ramírez-Macías’s PhD internship, carried out in 2016.
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