Computer aided ship design Assuring quality ship hull form representation for downstream applications

Herein, we present an integrated ship re-design/modification strategy that integrates the ‘Computer-Aided Design (CAD)’ and ‘Computational Fluid Dynamics (CFD)’ to modify the ship hull form for better performance in resistance. We assume a modular design and the ship hull form modification focuses on the forward module (e.g. bulbous bow) and aft module (e.g. stern bulb) only. The ship hull form CAD model is implemented with NAPA*TM and CFD model is implemented with Shipflow**TM. The basic ship hull form parameters are not changed and the modifications in some of the technical parameters because of re-designed bulbous bow and stern bulb are kept at very minimum. The bulbous bow is re-designed by extending an earlier method (Sharma and Sha (2005b)) and stern bulb parameters for re-design are computed from the experience gained from literature survey. The re-designed hull form is modeled in CAD and is integrated and analyzed with Shipflow**TM. The CAD and CFD integrated model is validated and verified with the ITTC approved recommendations and guidelines. The proposed numerical methodology is implemented on the ship hull form modification of a benchmark ship, i.e. KRISO container ship (KCS). The presented results show that the modified ship hull form of KCS - with only bow and stern modifications - using the present strategy, results into resistance and propulsive improvement.

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Fourier NUBS method to express ship hull form

Journal of Marine Science and Technology ◽

10.1007/s00773-003-0166-2 ◽

2004 ◽

Vol 9 (1) ◽

pp. 43-49 ◽

Cited By ~ 7

Author(s):

Munehiko Hinatsu

Keyword(s):

Ship Hull ◽

Hull Form

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Ship hull form design and optimization based on CFD

Towards Green Marine Technology and Transport ◽

10.1201/b18855-31 ◽

2015 ◽

pp. 235-244

Keyword(s):

Ship Hull ◽

Hull Form ◽

Design And Optimization ◽

Form Design ◽

Hull Form Design

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Ship Hull Form Optimization Using Artificial Bee Colony Algorithm

10.5957/smc-2014-t47 ◽

2014 ◽

Author(s):

Fuxin Huang ◽

Lijue Wang ◽

Chi Yang

Keyword(s):

Drag Reduction ◽

Artificial Bee Colony ◽

Interpolation Method ◽

Ship Hull ◽

Mathematical Functions ◽

Hull Form ◽

Abc Algorithm ◽

Bee Colony ◽

Hull Forms ◽

Fast Flow

In this paper, artificial bee colony (ABC) algorithms are introduced to optimize ship hull forms for reduced drag. Two versions of ABC algorithm are used: one is the basic ABC algorithm, and the other is an improved artificial bee colony (IABC) algorithm. A recently developed fast flow solver based on the Neumann-Michell theory is used to evaluate the drag of the ship in the optimization process. The ship hull surface is represented by discrete triangular panels and modified using radial basis function interpolation method. The developed optimization algorithms are first validated by benchmark mathematical functions with different dimensions. They are then applied to the optimization of DTMB Model 5415 for reduced drag. Two optimal hull forms are obtained by the ABC and the IABC algorithms. A large drag reduction is obtained by both of the algorithms. The optimal hull form obtained by the IABC algorithm has larger drag reduction than that of the hull form from the ABC algorithm. The results show that two ABC algorithms can be used for optimizing ship hull forms and the IABC algorithm has better performance than the ABC algorithm for the tested case in ship hull form optimization.

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A Comparison of Several Strategies to Optimize a Ship’s Aft Body

Journal of Ship Production and Design ◽

10.5957/jspd.2011.27.4.202 ◽

2011 ◽

Vol 27 (04) ◽

pp. 202-211

Author(s):

Auke van der Ploeg

Keyword(s):

Viscous Flow ◽

Scale Effects ◽

Full Scale ◽

Ship Hull ◽

Hull Form ◽

Wake Field ◽

Hull Forms ◽

Definition Of

This paper describes a procedure to optimize ship hull forms, based on double body viscous flow computations with PARNASSOS. A flexible and effective definition of parametric hull form variations is used, based on interpolation between basis hull forms. One of the object functions is an estimate of the required power. In this paper we will focus on how to improve this estimate, by using the B-series of propellers. Results of systematic variations applied to the VIRTUE tanker together with scale effects in the computed trends will be discussed. In addition, we will demonstrate how the techniques discussed in this paper can be used to design a model that has a wake field that strongly resembles the wake of a given containership ship at full scale.

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A Cruising Boat

Marine Technology and SNAME News ◽

10.5957/mt1.1976.13.4.401 ◽

1976 ◽

Vol 13 (04) ◽

pp. 401-411

Author(s):

Charles A. Curtze

Keyword(s):

Diesel Oil ◽

Ship Hull ◽

Hot Water ◽

Hull Form ◽

Central Heating ◽

Self Sufficiency ◽

Sailing Yacht ◽

High Degree ◽

Nickel Cadmium

The paper discusses the tradeoffs and payoffs of designing and building big ship capability into a small cruising sailing yacht. A Norwegian rescue ship hull form, large three-bladed controllable-pitch propeller, nickel-cadmium batteries, shaft-driven generator, above average horsepower, a high degree of watertight integrity, modest self-salvage capability, tugboat handling under power, low helmsman energy drain under all conditions, circumferential safety and grab rail, balanced rudder, diesel oil-fired range, and hot-water central heating are all discussed as they combine to fill the author's requirements for seaworthiness, seakeeping ability, safety, maintainability, self-sufficiency, and comfort at sea.

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