The Influence of Hydrodynamic Assumptions on Ship Maneuvering

Ghalib Taimuri, Tommi Mikkola, Jerzy Matusiak, Pentti Kujala, Spyros Hirdaris

Research output: Contribution to conferencePaperScientificpeer-review


We present a preliminary assessment on the influence of the hydrodynamic assumptions associated with ship motions, for vessels maneuvering in calm waters. Three approaches are considered: (a) Model 1 idealising the maneuvering of a ship in 3-dof as per Brix (1993); (b) Model 2 representing the 6-dof hybrid time domain unified seakeeping / maneuvering model of Matusiak (2017); and (c) Model 3 - idealising combined seakeeping and maneuvering nonlinear characteristics in 6-dof by the time domain Green function method of McTaggart (2005). Simulations of turning circle and zig-zag manoeuvers are assessed and compared against available data for two tankers (KVLCC2 & Esso Osaka) and a container ship (DTC). It is concluded that in calm waters simplified models with hydrodynamic derivatives from either RANSE CFD or model tests can be used. However, implementation of well-validated CFD hydrodynamic coefficients may be more economic for the development of practical engineering tools, such as rapid assessment tools accounting for evasiveness in ship crashworthiness.
Original languageEnglish
Number of pages6
Publication statusPublished - 29 Sept 2019
MoE publication typeNot Eligible
EventNumerical Towing Tank Symposium - Tomar, Portugal
Duration: 29 Sept 20191 Oct 2019
Conference number: 22


ConferenceNumerical Towing Tank Symposium
Abbreviated titleNuTTS
Internet address


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