Transcript Document

Chapter I. Introduction
Naval Architecture:
the science and engineering of designing ships and
other kinds of waterborne crafts.
• Kinds of ships
• Sub systems
• Fundamental principles of N.A.
1. Statics & Dynamics
2. Resistance
3. Propeller
I. Category of Ocean Vehicles
•
By Support (restoring) Forces
-Supported by buoyancy force – Conventional
displacement ship
- Supported by Hydrodynamic force - Hydrofoil
ships and Planning Hull ships, at Full Speed.
-Supported by Aerostatic force (pressure) - Air
cushion vehicles at full speed
-Ground supported- Ocean drilling platform (median
and shallow water)
• By Missions
-Military Purpose:
Aircraft carrier, Cruiser, Destroyer, Service
vessel, Patrol boat (gun boat), Landing craft.
-Non-military Purpose:
a. Transportation: Passenger ship,
Container ships, Bulk carrier (wheat, coal,
ore, mineral), Oil tanker (very large),
Specific vessel (LNG, etc.)
• By Missions (continues)
-Non-military Purpose:
b. Work Platform: Offshore drilling; Oil and gas
production; Oceanography research; Electronic
tracking and surveillance – satellite, communication,
weather monitoring and navigation assistance; Ocean
mining and dredging; Fishing, fish-processing;
Offshore processing – sea water, minerals; Offshore
power generation; Offshore service – construction,
pipe laying, salvage and retrieval, Ice-breaker;
Offshore support for personnel;
• By Missions (continues)
-Non-military Purpose:
c. Offshore commerce: Breakwaters, artificial
harbors (marinas); Deepwater mooring (buoys); At
sea storage (gas and LNG terminal); Recreation
(artificial reef);
Sea fish farms; Wind Mills; Renewable Energy;
By Configurations
• Surface displacement: Conventional ships
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•
•
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(single hull); Catamaran (double hull, large deck
area, small displacement, excellent stability).
Near Surface: Air cushion vehicles; Hydrofoils
and planning hull craft (small displacement, high
speed)
Submerged: Submersibles; submarines;
Underwater habitats; Submerged buoys.
Semi submersibles: Very deep, small water
plane
Bottom supported: Temporary & Permanent
jack-up;
Tanker
Small Water-plane Area Twin-Hull (SWATH)
Ferry (Catamaran, or SWATH)
Container Ship
Container Ship
Hydrofoil Craft
Ordinates Drawing of A Plane-Hull Craft
II. Sub Systems
•
Hull: Hydrostatic, hydrodynamic
performance (Resistance)*
•
Structure: Strength of hull**
•
Machinery and Propulsion: Main engine &
propellers*
•
Ship Control: (maneuvering)**
Sub systems (Continues)
•
Weapons & Deck Machinery:
•
Navigation: Sensors & radar.
•
Central Computer:
•
Communications:
•
Damage Control:**
Sub systems (Continues)
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Hotel & Provision and Service:
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Rigging and Mooring:** (OCEN 201)
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Economic feasibility: General Design
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Preliminary Design:
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Ship Yard & Dry Dock:
III. General Requirements
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For ocean transportation vehicles
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Mobility, speed
–
Ability to carry payload (wt/total displacement)
–
Cost (lift/drag or wt/drag ratio)
–
Performance (motion, maneuvering, safety)
–
See p3 of the textbook
General Requirements (Continue)
•
For Work Platforms:
- Performance: motion, station keeping,
structure.
- Logistics: mobility, delivery system, support
systems.
- Economics: initial, operating cost,
maintenance.