scholarly journals On the Development of Catamaran Hull Form for Fish Processing Vessel to Support Domestic Fishing Activities in Indonesia

Naše more ◽  
2021 ◽  
Vol 68 (3) ◽  
pp. 175-188
Author(s):  
Ahmad Fauzan Zakki ◽  
◽  
Deddy Chrismianto ◽  
Aulia Windyandari ◽  
Rizaldy Ilham
Keyword(s):  
Dynamic Stability ◽  
High Speed ◽  
Equation Model ◽  
Fish Processing ◽  
Hull Form ◽  
Initial Stage ◽  
Intact Stability ◽  
Principal Dimension ◽  
Hull Forms ◽  
Resistance Performance

Several advantages of multihull, such as catamaran, have been extensively discussed in the previous research. Therefore, this research focuses on developing a catamaran hull form for the fish processing vessel hull. The initial stage is determining the principal dimension and exploring the configurations of catamaran hull forms. The existing high-speed craft catamarans have been adopted to determine the parent model main dimensions using a linear regression equation model. Otherwise, the catamarans single demi-hull geometry was developed by converting and modifying the parent model hull form with enlarging the hull displacement to achieve the deadweight capacity and service speed requirements. The demi-hull spacing configuration with s/L 0.17, s/L 0.20, s/L 0.30, and s/L 0.40 on the resistance characteristics, intact stability, and sea-keeping behaviour were also explored. Furthermore, the comparisons with the previously proposed monohull were presented. Regarding the hull resistance performance, the analysis indicated that the catamaran hull form had better total resistance characteristics than the monohull on the service speed over 23 knots. In the case of intact stability, the analysis results presented that the catamaran hull form has better intact stability characteristics than the monohull. The dynamic stability of the catamarans also gave better dynamic stability at the heeling angle below 41.57°. Otherwise, the catamarans with s/L 0.17 and s/L 0.20 have lower dynamic stability than the monohull at the heeling angle larger than 41.57° and 58.03°, respectively. In the sea-keeping performance, the catamaran hull has shown an excellent rolling motion required for the offshore environment loading/unloading process. The large demi hull spacing of the catamarans hull can reduce the effect of the wave creating load on the roll motion response at the Beam Sea.

scholarly journals Development of Monohull Fish Processing Vessel Hullform to Support Domestic Fishing Activities in Indonesia

2019 ◽  
Vol 9 (1) ◽  
pp. 441-447
Keyword(s):  
Fluid Dynamic ◽  
Fish Processing ◽  
Hull Form ◽  
Fishing Boat ◽  
Initial Stage ◽  
Dynamic Methods ◽  
Intact Stability ◽  
Strip Theory ◽  
Principal Dimension ◽  
Hull Forms

This research is focused on the development of the design and prototype of monohull fish processing vessel hullform to support fishing activities such as catching fish, collecting fish from the smaller boats and processing fish catches. The extensive on-board facilities in the fish processing vessel are maintaining the freshness of the catch and improving the quality of catch fish than traditional fishing boat. The initial stage of this study is determining the principal dimension and exploring of the configurations of monohull hull forms. Furthermore, the investigation of resistance characteristics, intact stability and seakeeping behavior was carried out using strip theory and computational fluid dynamic methods. Regarding the performance of the hulls resistance, the analysis indicates that the hull form with smaller block coefficients showed better resistance characteristics. In the case of intact stability, the results of the analysis showed that the model 2 of monohull hull form showed better intact stability characteristics compared to the other models

Optimization on Resistance Performance of High Speed Unmanned Surface Vehicle in Middle-Low Speed

2011 ◽  
Vol 311-313 ◽  
pp. 2389-2392
Author(s):  
Wei Jia Ma ◽  
Hua Wei Sun ◽  
Yong Jie Pang
Keyword(s):  
High Speed ◽  
Optimization Method ◽  
Resistance Coefficient ◽  
Total Resistance ◽  
Hull Form ◽  
Unmanned Surface Vehicle ◽  
Low Speed ◽  
Non Linear Programming ◽  
Hull Forms ◽  
Resistance Performance

Unmanned surface vehicle has been the concern of the researchers at home and abroad as a new kind of unmanned platform ,especially for the middle-low speed resistance performance .An optimization method is proposed in this paper to find a hull form with perfect resistance performance in middle-low speed .This paper combines wave resistance and non-linear programming , Moreover, some hull forms are optimized to meet the combination of optimization punishing function with practical requirements and objective function to obtain Optimization form. The paper compared wave-making resistance coefficient and Total resistance (Newton) of Unit displacement (ton) between patent form and Optimization form to Show the feasibility of this method .The optimization results can provide reference for the subsequent hull form.

The Design of an Eight-Oared Rowing Shell

1993 ◽  
Vol 30 (02) ◽  
pp. 84-99
Author(s):  
Carl A. Scragg ◽  
Bruce D. Nelson
Keyword(s):  
Shallow Water ◽  
High Speed ◽  
Hull Form ◽  
Model Scale ◽  
Minimum Drag ◽  
Final Design ◽  
Minimum Displacement ◽  
Resistance Curves ◽  
Hull Forms ◽  
Minimum Resistance

Rules governing the design of rowing shells do not restrict basic hull parameters. In designing a new eight-oared rowing shell for international ard Olympic competition, the authors sought a high speed, minimum drag hull form, subject only to the constraints on minimum displacement and roll stability. An investigation of optimum hull parameters using analytically determined resistance curves was made. Optimum hull parameters for both deep and shallow water racing are presented. Using the hull parameters determined for minimum resistance at racing speeds in shallow water, several new hull forms were created and analyzed in both deep and shallow water. Two promising final design candidates were proposed for model-scale testing. Results of both steady and unsteady towing tests are presented.

scholarly journals An Optimization Study on the Hull Form and Stern Appendage for Improving Resistance Performance of a Coastal Fishing Vessel

2021 ◽  
Vol 11 (13) ◽  
pp. 6124
Author(s):  
Jin-Won Yu ◽  
Min-Kyung Lee ◽  
Yang-Ik Kim ◽  
Sung-Bu Suh ◽  
Inwon Lee
Keyword(s):  
Fuel Efficiency ◽  
Variation Method ◽  
Design Parameters ◽  
Fishing Vessel ◽  
Hull Form ◽  
Fishing Vessels ◽  
Optimization Study ◽  
Principal Dimension ◽  
The Republic ◽  
Hull Forms

In response to the increasing number of free trade agreements (FTA) and the Trans-Pacific Partnership (TTP), it is necessary to develop next-generation fishing vessels for the littoral sea of the Republic of Korea. The main objectives of such fishing vessels are to enhance the comfort of the crew and to improve fuel efficiency under the newly established principal dimension. This paper employs the hull form variation method to obtain a series of forebody hull forms of the 19 gross tonnage class of a coastal composite fishing vessel. Chine breadth modification has been used for hull form variations. The objective function is the minimum value of wavemaking resistance. A parametric study was conducted to observe the effects of design parameters on the objective functions, and hull-form optimization was performed. In addition to the hull-form optimization, the effect of the stern flap was investigated in terms of both resistance and operational performances.

CFD Simulation for Displacement Deep-Vee Vessels on Resistance Influence Factor

2011 ◽  
Vol 55-57 ◽  
pp. 692-697
Author(s):  
Yi Xie ◽  
Xiang Dong Xia
Keyword(s):  
Pressure Distribution ◽  
High Speed ◽  
Cfd Simulation ◽  
Influence Factor ◽  
Influence Factors ◽  
Two Phases ◽  
Hull Forms ◽  
Bulbous Bow ◽  
Rng Turbulence Model ◽  
Resistance Performance

Resistance influence factors of displacement type Deep-vee forms are analyzed with eight hull forms provided. The free surface viscous flow of these forms is calculated by air-water two phases RANS equations with RNG turbulence model and volume of fraction method. Total resistance, pressure distribution and wave profile of bow are presented. Some results can be taken as follows: while maintaining the same tonnage, L/B ratio and draft, the resistance performance of Deep-Vee vessels is excellent at high speed if a large transverse dead rise angle was located from 50%front midship to 25% backward midship; The resistance performance at a lesser L/B and draft is worse if the displacement and dead rise angle is the same; Furthermore, it can be improved by a cigar-shaped bulbous bow. The change of pressure distribution for cigar-shaped bulbous bow is more slightly than that of tobacco pipe-shaped bulbous bow.

Super Yatch Design Study for Malaysian Sea (Langkawi Island)

2015 ◽  
Vol 74 (5) ◽  
Author(s):  
Koh K. K. ◽  
Ibrahim M. I. H. M. ◽  
Kader A. S. A. ◽  
Agoes P. ◽  
Rahimuddin Rahimuddin ◽  
...  
Keyword(s):  
Design Methodology ◽  
Sea Water ◽  
Preliminary Design ◽  
Design Study ◽  
Hull Form ◽  
Foreign Companies ◽  
Stability Performance ◽  
Stable Conditions ◽  
Hull Forms ◽  
Resistance Performance

Malaysia as a country surrounded by water has a huge economic and geographical potential in the development of super yacht industry in South East Asia. There is lack of super yacht design study specifying to Malaysian marinas and seas. Most of the super yacht operates in Malaysia were built and bought directly from oversea, and chartered by foreign companies. It is hence the purpose of this study to survey on Malaysian sea water, particularly Langkawi Island, to introduce a design methodology in producing a preliminary design of super yacht that suits Langkawi Island, and serves as a guideline for future super yacht design for Malaysian sea in different marinas. Suitable dimensions of super yacht were derived by using dimensional relationship via statistical method. Two types of hull form designs (round bilge and V-bottom hull) were designed using Maxsurf Pro software. Resistance analysis on the two hull forms were carried out using Savitsky Pre-Planing and Compton methods via MaxsurfHullspeed software, and stability performance of the two hull forms was analyze using Hydromax software. V-Bottom hull form is found to have better resistance performance as compared to round bilge hull form, and both hull forms are found to be in stable conditions and comply with IMO requirements. 

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