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Design of a controlled side launching system for tugboats P R E S E N T E D BY: J U A N S E B A S T I A N C A R D O N A
M E C H A N I C A L E N G I N E E R . M S C I N C O M P U TAT I O N A L M E C H A N I C S . M S C I N N AVA L A R C H I T E C T U R E
A D V I S O R : A S S O C I AT E P R O F E S S O R R E N A R D O F LO R I N T E O D O R , " D U N A R E A D E J O S " U N I V E R S I T Y O F G A L AT I
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Content o LAYOUT
o MOTIVATION
o GRAVITATIONAL SIDE LAUNCHING SYSTEM IN DAMEN
o SPECIFICATIONS
o DESIGN PROPOSAL
o DETAILED DESIGN OF TIPPING TABLE:
o CONCLUSIONS
o ACKNOWLEDGEMENTS
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DAMEN SHIPYARDS GALATI
Danube
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GRAVITATIONAL SIDE LAUNCHING SYSTEM IN DAMEN SHIPYARDS GALATI
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TUGBOAT CHARACTERISTICS
Characteristic
Length Beam Draught Displacement
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MOTIVATION o Lifting capacity of the cranes restrict the launching by crane.
o Violent movement at the edge of the slipways.
o Risk of skidding and tilting the ship before reaching the water.
o Risk of impact between the wooden supports and hull.
o Risk of impact between cradle and vessel.
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GRAVITATIONAL SIDE LAUNCHING SYSTEM IN DAMEN SHIPYARDS GALATI
�𝐹𝐹 = 𝑚𝑚𝑡𝑡𝑡𝑡𝑡𝑡𝑡𝑡𝑡𝑡 ∗ 𝑎𝑎 = 𝐹𝐹𝑔𝑔𝑔𝑔𝑡𝑡𝑔𝑔 − 𝐹𝐹𝑓𝑓𝑔𝑔𝑓𝑓𝑓𝑓𝑡𝑡𝑓𝑓𝑡𝑡𝑓𝑓 − 𝐹𝐹𝑑𝑑𝑔𝑔𝑡𝑡𝑔𝑔𝑑𝑑𝑔𝑔𝑡𝑡𝑑𝑑𝑡𝑡𝑑𝑑 − 𝐹𝐹𝑑𝑑𝑔𝑔𝑡𝑡𝑔𝑔𝑑𝑑𝑑𝑑𝑑𝑑𝑑𝑑𝑑𝑑𝑡𝑡 �𝐹𝐹 = 𝑚𝑚𝑡𝑡𝑡𝑡𝑡𝑡𝑡𝑡𝑡𝑡 ∗ 𝑎𝑎 = 𝐹𝐹𝑏𝑏𝑏𝑏𝑡𝑡𝑏𝑏𝑡𝑡𝑓𝑓𝑓𝑓𝑏𝑏 + 𝜆𝜆𝑏𝑏 ∆𝛼𝛼 = 𝑓𝑓(𝑉𝑉,∆𝑡𝑡,𝐾𝐾𝛼𝛼 ,𝜆𝜆𝛼𝛼)
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REQUIREMENTS o The system must be demountable or temporary system.
o Possibility of recover ships (Optional).
o The system must be modular.
o The demountable system must weigh less than the lift capacity of the two cranes.
o The system must consider the different sceneries of launching regarding the level of the river.
o Not speed launching requirements but launching must be slow and controlled.
o Accessibility for Lorries coming with the ship.
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BLACKBOX DIAGRAM
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DESIGN PROPOSAL
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DESIGN PROPOSAL (Tipping table)
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DESIGN PROPOSAL (Tipping table)
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DESIGN PROPOSAL (Tipping table)
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DESIGN PROPOSAL (Tipping table)
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DETAILED DESIGN OF TIPPING TABLE (Structural Analysis) Security factor calculation
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DETAILED DESIGN OF TIPPING TABLE (Kinematic analysis at 0 m)
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DETAILED DESIGN OF TIPPING TABLE (Kinematic analysis at 3.95 m)
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CONCLUSIONS oThe controlled side launching system fulfil all the specifications and requirements of the design.
oThe design structure accomplishes with the minimum security factor of SF=1.2.
oThe results found for the scenery of 3.95 m (from the level zero) shows a high risk of damage of the vessel.
oThe controlled side launching system can be adjustable regarding the water level of the river.
oExtremely low water condition results give and safety launching without risk of damage.
oThe computational model developed in the study, shows realistic behavior. However, must be validated rigorously before use it as tool.
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GRACIAS
We express our deepest thanks to “Dunarea de Jos” University of Galati, Ecole Central de Nantes and University of Liege and all the Professors involve in the EMSHIP program.
Many tanks to DMT Company and its engineer department for the total and unconditional support during the whole process of design.
Specially tanks to workers from Damen Shipyards Galati who advice and welcome me.
ACKNOWLEDGEMENTS
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SPECIFICATIONS o System is designed for launch ships with the maximum capacities of the Stan tugboat 4511.
o The total capacity of one slipway is 600 tons (biggest tugboat weight 900 tons).
o Ship maximum size 15 m beam (biggest tugboat 14 m beam).
o Ship maximum size 45 m length (biggest tugboat 45 m length).
o Reach draught enough to release the vessel (around 5.6 m).
o Launching speed about 0.1 m/min.