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DETERMINATION OF THE CHARACTERISTICS OF THE PLATFORM SUPPLY VESSELS DYNAMIC POSITIONING SYSTEM

Децик Р. А.
Article language: английский

Annotation

An algorithm for determining the characteristics of the dynamic positioning system of oil and gas platform supply vessels (PSV) and vessels similar to them in architectural, structural and hydrodynamic types AHTS, DSV, OSV) is presented. The substantiation of the characteristics of the dynamic positioning system is considered from the point of view of general ship design and consists in determining the required thrust of the propellers that ensure the retention of the vessel in a given position. The required thrust and the energy required for its creation are determined based on the definition of the values of external forces acting on the maintaining vessel, the physical nature of which is due to the efforts from the effects of wind, waves and currents. The key concept of the described method for determining the required characteristics of the system is the static balance of forces acting on the positioned vessel. With this approach, external forces are assumed to be constant in time and dependent on wind speed. Based on the use of simplified dependencies and dimensionless coefficients obtained from the model tests of similar vessels, several ways are proposed to determine the external forces acting on the vessel. The method of verification calculation of the fact of positioning of the vessel is proposed. Keywords: platform supply vessels, dynamic positioning, oil and gas platforms, bow thrusters, static balance

Bibliography

Blendermann, W., 1994, “Parameter Identi cation of Wind Loads on Ships”, Journal of Wind Engineering and Industrial Aerodynamics, Vol. 51, pp. 339-351
DNVGL-ST-0111 Assessment of station keeping capability of dynamic positioning vessels, March 2018
IMCA M 140 Rev. 1 Speci cation for DP Capability Plots, June 2000
Veer R; Gachet M. Dynamic Positioning: Early Design, Capability and O sets-A Novel Approach; OMAE2011-49354, June 19-24, 2011
Hasan M.S. A Procedure for the Dynamic Positioning Estimation in Initial Ship-Design; Master Thesis; Rostock, February 2018
Cristian A. Morales Vásquez, Evaluation of Medium Speed Diesel generator sets and energy storage technologies as alternatives for reducing fuel consumption and exhaust emissions in electric propulsion systems for PSVs; Ship Science & Technology - Vol. 9 - n. 18 - (49-62); January 2016
IMO. Guidelines for Vessels with Dynamic Positioning Systems - Circular 645. London. 1994
Xiaopeng Wu; Torgeir Moan. Positioning capability of anchor handling vessels in deep water during anchor deployment. J Mar Sci Technol (2015) 20:487-504, DOI 10.1007/s00773-014-0301-2. January 2015
Ankudinov, V., Jakobsen, B.K., 1990. Wave drift forces in shallow water. Tracor Hydronautics Rep