Automatic procedure of side ship launching calculation

  • Mochammad Ramzi “Dunarea de Jos” University of Galati
  • Florin Pacuraru “Dunarea de Jos” University of Galati
Keywords: Side launching, kinematic, velocity, simulation.

Abstract

The side launching method has become a solution of transporting ship into water in restricted water/canal. Unfortunately, this method brings higher possibility of capsizing mainly occurring when the ship interacts with the water surface. Shipyards need detailed calculations and procedures to predict the outcome of ship in water, yet they are not able to perform due to its complexity of computation and its being time-consuming. Thus, this thesis proposes the automatic procedure of the side ship launching. Using the gravitational side launching theory, a code has been developed to solve the 3D launching case. Computation of ship motions, velocity and acceleration are conducted to predict the actual ship simulation. To simplify things, three phases of analysis are introduced corresponds to the kinematics behaviour of the object when interacts with water. From this study, the result shows a good agreement in comparison to shipyard calculation results with less than 5% differences. However, to be applied in shipyard, this simulation should be done further for the dynamic motion to capture all aspects.

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References

[1]. Jong D. P., “Numerical simulation of the side launching of a ship”. Master thesis. University of Groningen, 2004.
[2]. Leavitt. C. M., “Ship design and construction. Society of Naval Architects and marine engineers”, New York, pages 657-697, 1980.
[3]. Ye. Z., “Dynamics of ships side launching”. Elsevier Science Ltd. Computers & structures Vol 53 no. 4 pp 861-865, 1994.
[4]. A. Fitriadhy and A.M.A. Malek, “Computational fluid dynamics analysis of a ship’s side launching in restricted waters”, Journal of Mechanical Engineering and Sciences. Volume 11, Issue 4, pp. 2993-3003, 2017.
[5]. Cardona J. S., “Design of a controlled side launching system for tugboats”, Master thesis.University of Galati (EMSHIP), 2017.
[6]. Damen Shipyard, “Ship loading conditions.Report of intact stability”, 2013.
Published
2018-12-31
How to Cite
1.
Ramzi M, Pacuraru F. Automatic procedure of side ship launching calculation. Annals of ”Dunarea de Jos” University of Galati. Fascicle XI Shipbuilding [Internet]. 31Dec.2018 [cited 28Oct.2020];41:133-8. Available from: https://www.gup.ugal.ro/ugaljournals/index.php/fanship/article/view/1022
Section
Articles

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