On the calculation of the forces developed by escort tugs
Keywords:
escort, tug, computer model simulation, equilibrium prediction.
Abstract
Authorities and harbour operators demand tugs to assist ever-larger ships in more severe weather conditions in confined waters. The escort of such ships is carried out by specially designed tugs connected to the assisted ship by a towline in order to control course and speed of the assisted ship when it comes to sail in potentially dangerous situations, and so the risk of grounding and collision is strongly reduced. In order to achieve the "escort tug" service notation, it is necessary to predict the maximum steering forces applied on the assisted ship at different speeds. The paper deals with a method for the prediction of the escort capabilities of a tug through the quasi-steady solution of the dynamic equilibrium.
References
[1]. Aryszuk J., "Steady-state Manoeuvring of a Generic ASD Tug in Escort Pull and Bowrope Aided Push Operation", Transnav, the International Journal on Marine Navigation and Safety of Sea Transportation, Vol. 8, N. 3, September 2014.
[2]. De Jong G. T., "The Class Answer to the Rapidly Developing Tug Industry", Proceedings of ITS, Toulon, 2010.
[3]. Germanisher Lloyd, "Rules for the Classification and Construction", Pt. 1 Ch.1 Sec. 25, 2015.
[4]. IACS, "Unified Requirements UR A2, Shipboard fittings and supporting hull structure associated with towing and mooring on conventional vessels", 2007.
[5]. Northern Gateway Pipelines Limited Partnership, "B 23-20, Appendix A TERMPOL TDR Maneuvering Study of Escorted Tankers Part 2 Main Report", FORCE Technology., 2011.
[6]. Ratcliff A. J. T., "A study of the hydrodynamic performance of VoithSchneider propelled escort tugs", University of British Columbia, 2003.
[7]. RINA, "Rules for the Classification of Ships", Pt. E Ch. 14, 2015.
[8]. Smoker B., "Escort Tug Performace Prediction: A CFD Method", University of Victoria, 2012.
[9]. SOLAS, "Towing and mooring equipment", Ch. II-1 Reg. 3-8, IMO 6th edition, 2014
[10]. Van Kasteren J.," The ART of tugnology: the ultimate balance between safe ship assist and safe escorting duties", ROTORTUG, 2012.
[11]. White F. M., "Fluid Mechanics", MacGrawHill, 2006.
[2]. De Jong G. T., "The Class Answer to the Rapidly Developing Tug Industry", Proceedings of ITS, Toulon, 2010.
[3]. Germanisher Lloyd, "Rules for the Classification and Construction", Pt. 1 Ch.1 Sec. 25, 2015.
[4]. IACS, "Unified Requirements UR A2, Shipboard fittings and supporting hull structure associated with towing and mooring on conventional vessels", 2007.
[5]. Northern Gateway Pipelines Limited Partnership, "B 23-20, Appendix A TERMPOL TDR Maneuvering Study of Escorted Tankers Part 2 Main Report", FORCE Technology., 2011.
[6]. Ratcliff A. J. T., "A study of the hydrodynamic performance of VoithSchneider propelled escort tugs", University of British Columbia, 2003.
[7]. RINA, "Rules for the Classification of Ships", Pt. E Ch. 14, 2015.
[8]. Smoker B., "Escort Tug Performace Prediction: A CFD Method", University of Victoria, 2012.
[9]. SOLAS, "Towing and mooring equipment", Ch. II-1 Reg. 3-8, IMO 6th edition, 2014
[10]. Van Kasteren J.," The ART of tugnology: the ultimate balance between safe ship assist and safe escorting duties", ROTORTUG, 2012.
[11]. White F. M., "Fluid Mechanics", MacGrawHill, 2006.
Published
2015-12-31
How to Cite
1.
Bucci V, Marino A. On the calculation of the forces developed by escort tugs. Annals of ”Dunarea de Jos” University of Galati. Fascicle XI Shipbuilding [Internet]. 31Dec.2015 [cited 20Apr.2024];38:5-4. Available from: https://www.gup.ugal.ro/ugaljournals/index.php/fanship/article/view/1316
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