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Abstract
An assessment is made of the hydrodynamic interaction forces acting on a tug sailing freely in the vicinity of the bow of a large container vessel. For this purpose, a series of towing tank test have been performed during which the model of an azimuth stern drive tug was towed together with the model of a container carrier. Forces and moments on the tug model were measured for a range of relative positions and drift angles at multiple forward speeds. The model test results were incorporated in a fast-time simulation program to assess the steering action required to keep the tug at a fixed station by controlling the thrust and azimuth angle of both thrusters. Through simulations at different positions at which the towline is passed, an assessment is made of the most suitable position to perform this action.
Keywords
Tug Operation, Ship Simulation, Towing Tank Tests

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Citation

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Chicago
Geerts, Stefan, Marc Vantorre, Katrien Eloot, Rene Huijsmans, and Niko Fierens. 2011. “Interaction Forces in Tug Operations.” In 2nd International Conference on Ship Manoeuvring in Shallow and Confined Water : Ship to Ship Interaction : Conference Proceedings, ed. Bjørnar Pettersen, Tor Einar Berg, Katrien Eloot, and Marc Vantorre, 153–163. London, UK: Royal Institution of Naval Architects.
APA
Geerts, Stefan, Vantorre, M., Eloot, K., Huijsmans, R., & Fierens, N. (2011). Interaction forces in tug operations. In B. Pettersen, T. E. Berg, K. Eloot, & M. Vantorre (Eds.), 2nd International conference on ship manoeuvring in shallow and confined water : ship to ship interaction : conference proceedings (pp. 153–163). Presented at the 2nd International conference on Ship Manoeuvring in Shallow and Confined Water : Ship to ship interaction, London, UK: Royal Institution of Naval Architects.
Vancouver
1.
Geerts S, Vantorre M, Eloot K, Huijsmans R, Fierens N. Interaction forces in tug operations. In: Pettersen B, Berg TE, Eloot K, Vantorre M, editors. 2nd International conference on ship manoeuvring in shallow and confined water : ship to ship interaction : conference proceedings. London, UK: Royal Institution of Naval Architects; 2011. p. 153–63.
MLA
Geerts, Stefan, Marc Vantorre, Katrien Eloot, et al. “Interaction Forces in Tug Operations.” 2nd International Conference on Ship Manoeuvring in Shallow and Confined Water : Ship to Ship Interaction : Conference Proceedings. Ed. Bjørnar Pettersen et al. London, UK: Royal Institution of Naval Architects, 2011. 153–163. Print.
@inproceedings{1989202,
  abstract     = {An assessment is made of the hydrodynamic interaction forces acting on a tug sailing freely in the vicinity of the bow of a large container vessel. For this purpose, a series of towing tank test have been performed during which the model of an azimuth stern drive tug was towed together with the model of a container carrier. Forces and moments on the tug model were measured for a range of relative positions and drift angles at multiple forward speeds. The model test results were incorporated in a fast-time simulation program to assess the steering action required to keep the tug at a fixed station by controlling the thrust and azimuth angle of both thrusters. Through simulations at different positions at which the towline is passed, an assessment is made of the most suitable position to perform this action.},
  author       = {Geerts, Stefan and Vantorre, Marc and Eloot, Katrien and Huijsmans, Rene and Fierens, Niko},
  booktitle    = {2nd International conference on ship manoeuvring in shallow and confined water : ship to ship interaction : conference proceedings},
  editor       = {Pettersen, Bj{\o}rnar and Berg, Tor Einar and Eloot, Katrien and Vantorre, Marc},
  isbn         = {9781905040834},
  keyword      = {Tug Operation,Ship Simulation,Towing Tank Tests},
  language     = {eng},
  location     = {Trondheim, Norway},
  pages        = {153--163},
  publisher    = {Royal Institution of Naval Architects},
  title        = {Interaction forces in tug operations},
  year         = {2011},
}