1.
بسمه‌تعالی آشنايي با انواع شناورها آذر ماه 86

2.
فهرست <ul><li>تعاريف اوليه و ابعاد اصلي </li></ul><ul><li>تقسيم‌بندي انواع شناورها </li></ul><ul><li>آشنايي با شناورهاي تندرو </li></ul><ul><li>مفاهيم شناوري </li></ul><ul><li>جمع‌بندي </li></ul>

3.
L OA L PP AP FP DWL Sheer تعاريف اوليه و ابعاد اصلي Beam Camber Depth Draft Freeboard WL K C L

4.
Ship Lines: - Body plan (front View) - Shear plan (side view) - Half breadth plan (top view)

6.
Rigid Body Motion of a Ship <ul><li>Translational motion : surge, sway, heave </li></ul><ul><li>Rotational motion : roll, pitch, yaw </li></ul>6 degrees of freedom surge roll pitch heave sway yaw

7.
<ul><li>تقسيم‌بندي از لحاظ كاربرد </li></ul><ul><ul><li>غيرنظامي </li></ul></ul><ul><ul><li>نظامي </li></ul></ul><ul><li>تقسيم‌بندي از لحاظ سرعت </li></ul><ul><ul><li>جابجايي ( Displacement ) </li></ul></ul><ul><ul><li>نيمه‌جابجايي ( Semi-Displacement ) </li></ul></ul><ul><ul><li>پروازي ( Planing ) </li></ul></ul>تقسيم‌بندي انواع شناورها

8.
انواع شناورهاي غير نظامي Bulk carrier Container carrier Gas tanker General Cargo

9.
Harbor Tug Passenger ship RO-RO Tanker انواع شناورهاي غير نظامي

10.
انواع شناورهاي نظامي Aircraft Carrier Battleship Corvette Cruiser Fast Attack Craft Frigate

11.
Classification of Ship by Support Type <ul><li>Hydrostatic Support </li></ul><ul><ul><li>Conventional Ship </li></ul></ul><ul><li>Hydrodynamic Support </li></ul><ul><ul><li>Planning Hull </li></ul></ul><ul><ul><li>- Hydrofoil </li></ul></ul><ul><ul><li>- SWATH ( S mall W aterplane A rea T win H ull) </li></ul></ul><ul><ul><li>- HYSWAS ( HY drofoil S mall W aterplane A rea S hip) </li></ul></ul><ul><li>Aerostatic Support </li></ul><ul><ul><li>- Hydroplane </li></ul></ul><ul><ul><li>- ACV ( A ir C ushion V ehicles) </li></ul></ul><ul><ul><li>- SES ( S urface E ffect S hip) </li></ul></ul><ul><li>Submarine </li></ul><ul><ul><li>- Submarine </li></ul></ul><ul><ul><li>- AUV/ROV </li></ul></ul>

12.
G B WL F B : Resultant Buoyancy force due to the distributed hydrostatics pressure Δ : Resultant weight force due to the distributed weight

14.
SWATH آشنايي با انواع شناورها

15.
SWATH

16.
انواع فرم بدنه شناورهاي مدرن

17.
آشنايي با انواع شناورهاي تندرو High Speed Semi-displacement Round Bilge Hull Form High Speed Hard Chine Form

18.
آشنايي با شناورهاي تندرو Hydrostatic Aerostatic Hydrodynamic Displacement volume below the water surface: Displacement volume above the water surface:

19.
G B WL F B : Resultant Buoyancy force due to the distributed hydrostatic pressure F P : Resultant Planing force due to the distributed hydrodynamic pressure Δ : Resultant weight force due to the distributed weight

20.
<ul><li>Planning Hull </li></ul><ul><li>- supported by the hydrodynamic pressure developed </li></ul><ul><li>under the hull at high speed </li></ul><ul><li>- V or flat type shape </li></ul><ul><li>- commonly used in pleasure boat, patrol boat, </li></ul><ul><li>missile boat, racing boat </li></ul>Hydrodynamic Support

21.
High speed monohull

22.
High speed monohull

23.
Catamaran

24.
Catamaran

25.
Trimaran

26.
Trimaran combat concept vessel

27.
Pentamaran

28.
Wave-piercing Catamaran

29.
<ul><li>Hydrofoil Ship </li></ul><ul><li>- Supported by a hydrofoil, like wing on an aircraft </li></ul><ul><li>- Fully submerged hydrofoil ship </li></ul><ul><li>- Surface piercing hydrofoil ship </li></ul>Hydrodynamic Support

30.
Hydrofoils Surface Piercing Fully Submerged آشنايي با انواع شناورهاي تندرو

31.
Hydrofoil vessel

32.
HYSWAS

33.
شناور Hydroplane

34.
شناور Hydroplane

35.
Aerostatic Support - Supported by cushion of air generated by a fan. - ACV (Air Cushion Vehicle) hull material : rubber propeller : placed on the deck amphibious operation - SES (Surface Effect Ship) side hull : rigid wall (steel or FRP) bow : skirt propulsion system : placed under the water water jet propulsion supercavitating propeller not amphibious operation

36.
Air Cushion Vehicles Surface Effect Ship Hovercraft آشنايي با انواع شناورهاي تندرو

37.
ACV (Air Cushion Vehicles)

38.
SES

39.
Submarine

41.
انواع شناورها

43.
Center of Floatation & Center of Buoyancy <ul><li>LCF : centroid of water plane from the amidships </li></ul><ul><li>TCF : centroid of water plane from the centerline </li></ul>Amidships LCF TCF centerline - Centroid of waterplane (LCF varies depending on draft) - Pivot point for list and trim of floating ship Center of Floatation مفاهيم شناوري

44.
<ul><li>LCB : Longitudinal center of buoyancy from amidships </li></ul><ul><li>KB : Vertical center of buoyancy from the Keel </li></ul><ul><li>TCB : Transverse center of buoyancy from the centerline </li></ul>Center line Center of Buoyancy <ul><li>Centroid of displaced water volume </li></ul><ul><li>Buoyant force act through this centroid. </li></ul>Base line TCB LCB KB

45.
2 2 1 1 2 <ul><li>Buoyancy force (Weight of Barge) </li></ul><ul><li>LCB : at midship </li></ul><ul><li>TCB : on centerline </li></ul><ul><li>KB : T/2 </li></ul><ul><li>Reserve Buoyancy Force </li></ul>WL 1 1 1 1 T/2 centerline B B WL C L

46.
Resistance Values and Coefficients <ul><li>Resistance values, denoted by R , are dimensional values </li></ul><ul><ul><li>R T = Total hull resistance is the sum of all resistance </li></ul></ul>R T = R AA + R W + R V <ul><ul><li>R AA = Resistance caused by calm air on the superstructure </li></ul></ul><ul><ul><li>R W = Resistance due to waves caused by the ship </li></ul></ul><ul><li> - A function of beam to length ratio, displacement, hull shape & </li></ul><ul><li>Froude number (ship length & speed) </li></ul><ul><ul><li>R V = Viscous resistance (frictional resistance of water) </li></ul></ul><ul><ul><li>- A function of viscosity of water, speed, and wetted surface </li></ul></ul><ul><ul><ul><li>area of ship </li></ul></ul></ul>

47.
Total Resistance and Relative Magnitude of Components <ul><li>At low speeds R v dominates </li></ul><ul><li>At higher speeds R w is dominates </li></ul><ul><li>Hump (Hollow)- location is function of ship length and speed </li></ul>The amount of each resistance component will vary depending on speed: Viscous Air Resistance Wave-making Speed (kts) Resistance (lb) Hump Hollow

48.
Ship Drive Train and Power Ship Drive Train System Engine Reduction Gear Bearing Seals Screw Strut BHP SHP DHP THP EHP

49.
Basic Theory Behind Ship Modeling <ul><li>Modeling a ship </li></ul><ul><li>- It is not possible to measure the resistance of the full-scale ship </li></ul><ul><li>- The ship needs to be scaled down to test in the tank but </li></ul><ul><li>the scaled ship (model) must behave in exactly same way </li></ul><ul><li>as the real ship . </li></ul><ul><li>- How do we scale the prototype ship ? </li></ul><ul><li>- Geometric and Dynamic similarity must be achieved. </li></ul>? Dimension Speed Force Prototype Model Prototype ship model ship

50.
Effective Horse Power (EHP) <ul><li>EHP : The power required to move the ship hull at a given </li></ul><ul><li>speed in the absence of propeller action </li></ul><ul><li>(EHP is not related with Power Train System) </li></ul><ul><li>EHP can be determined from the towing tank experiments at </li></ul><ul><li>the various speeds of the model ship. </li></ul><ul><li>EHP of the model ship is converted into EHP of the full scale </li></ul><ul><li>ship by Froude’s Law . </li></ul>V Towing Tank Towing carriage Measured EHP

53.
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