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The Analysis of Motion Dynamics and Resistance of the Multipurpose Boat Operating in Shallow Water

Kulczyk T., Górnicz T.

TransNav : International Journal on Marine Navigation and Safety of Sea Transportation

2014

Vol. 8, no. 3

359--363

Polish market of small boats has been developed very dynamically in recent years. Market competition forces the shipyards to build new more efficient hull forms and to cut the cost of production as well. This is why modern computer simulation programs are used more often by naval architects. Another trend is to design more universal ships that may be used by larger number of diversified customers. This paper presents project proposal of multipurpose boat hull form. The boat was design to fulfil the requirements imposed by public services like water police, fire brigades, and border guards. It is supposed to be operated on unexplored floodplains and other type shallow waters. The analysis of boat’s motion was based on computer simulations. The resistance curve was evaluated with two methods: comparison study of model test results of similar ships and CFD methods. The results obtained from Ansys Fluent and FINE/Marine systems were compared in this paper. It was shown that taking into consideration dynamic trim and sinkage has a significant impact on free surface capture and resistance values.

Simplified Method for Estimating Maximum Ship’s Draught when Navigating in Shallow Water on the South of Stolpe Bank in the Aspect of the Vessels with Maximum Dimensions and Draught

Rutkowski G., Królikowski A.

TransNav : International Journal on Marine Navigation and Safety of Sea Transportation

2010

Vol. 4, no. 4

405--414

This paper considers analysis of maximum draught of a merchant vessel, which can maintain safety of navigation in different exterior condition (average and extreme) on shallow water in Stolpe gutter and keep required under keel clearance, i.e. navigational reserve of depth. To depict maximum draught of a vessel we use practical method which incorporates risk of navigational and model of ship’s domain. Results are compared with guidelines published by Decree of Minister of Transport and Maritime Economy from 01.06.1998 about technical conditions, which should be met by hydro mechanical sea structure, which operate vessels with the given particulars.

Asymptotic Theory of Ship Motions in Regular Waves Under Shallow Water Conditions

Vorobyov Y. L., Stasenko M. S.

TransNav : International Journal on Marine Navigation and Safety of Sea Transportation

2010

Vol. 4, no. 4

415--420

The hydrodynamic theory of ship motions in shallow water under the action of regular waves is discussed. The boundary value problem for velocity potential is solved using the matched asymptotic expan-sion method (MAEM). The solution is based on Fourier – Michell integral transformation technique and char-acteristics of Helmholtz and Klein – Gordon equations. Using the obtained results formulae for hydrodynamic characteristics are derived. The application of these formulae demonstrated good coincidence of the results of calculations and model experiments carried out in towing tank of Odessa National Maritime University.