بسمه‌تعالی آشنايي با انواع شناورها آذر ماه  86
فهرست <ul><li>تعاريف اوليه و ابعاد اصلي </li></ul><ul><li>تقسيم‌بندي انواع شناورها </li></ul><ul><li>آشنايي با شناورهاي تن...
L OA L PP AP FP DWL Sheer تعاريف اوليه و ابعاد اصلي Beam Camber Depth Draft Freeboard WL K C L
Ship   Lines: - Body plan (front View)  - Shear plan (side view)  - Half breadth plan (top view)
 
Rigid Body Motion of a Ship <ul><li>Translational motion : surge, sway, heave </li></ul><ul><li>Rotational motion : roll, ...
<ul><li>تقسيم‌بندي از لحاظ كاربرد </li></ul><ul><ul><li>غيرنظامي </li></ul></ul><ul><ul><li>نظامي </li></ul></ul><ul><li>ت...
انواع شناورهاي غير نظامي Bulk carrier Container carrier Gas tanker General Cargo
Harbor Tug Passenger ship RO-RO Tanker انواع شناورهاي غير نظامي
انواع شناورهاي نظامي Aircraft  Carrier Battleship Corvette Cruiser Fast Attack Craft Frigate
Classification of Ship by Support Type  <ul><li>Hydrostatic Support </li></ul><ul><ul><li>Conventional Ship </li></ul></ul...
G B WL F B  : Resultant Buoyancy force due to the distributed hydrostatics pressure Δ   : Resultant weight force due to th...
 
SWATH آشنايي با انواع شناورها
SWATH
انواع فرم بدنه شناورهاي مدرن
آشنايي با انواع شناورهاي تندرو High Speed Semi-displacement Round Bilge Hull Form High Speed Hard Chine Form
آشنايي با شناورهاي تندرو Hydrostatic Aerostatic Hydrodynamic Displacement volume below the water surface: Displacement vol...
G B WL F B  : Resultant Buoyancy force due to the distributed hydrostatic pressure F P  : Resultant Planing force due to t...
<ul><li>Planning Hull </li></ul><ul><li>- supported by the hydrodynamic pressure developed  </li></ul><ul><li>under the hu...
High speed monohull
High speed monohull
Catamaran
Catamaran
Trimaran
Trimaran combat concept vessel
Pentamaran
Wave-piercing Catamaran
<ul><li>Hydrofoil Ship </li></ul><ul><li>-  Supported by a hydrofoil, like wing on an aircraft </li></ul><ul><li>- Fully s...
Hydrofoils Surface Piercing Fully Submerged آشنايي با انواع شناورهاي تندرو
Hydrofoil vessel
HYSWAS
شناور  Hydroplane
شناور  Hydroplane
Aerostatic Support - Supported by cushion of air generated by a fan. -  ACV  (Air Cushion Vehicle) hull material : rubber ...
Air Cushion Vehicles Surface Effect Ship Hovercraft آشنايي با انواع شناورهاي تندرو
ACV (Air Cushion Vehicles)
SES
Submarine
 
انواع شناورها
 
Center of Floatation & Center of Buoyancy <ul><li>LCF  : centroid of water plane from the amidships </li></ul><ul><li>TCF ...
<ul><li>LCB : Longitudinal center of buoyancy from amidships </li></ul><ul><li>KB  : Vertical center of buoyancy from the ...
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 centerlin...
Resistance Values and Coefficients <ul><li>Resistance values, denoted by  R , are  dimensional  values </li></ul><ul><ul><...
Total Resistance and Relative Magnitude of Components <ul><li>At low speeds  R v  dominates  </li></ul><ul><li>At higher s...
Ship Drive Train and Power Ship Drive Train System Engine Reduction Gear Bearing Seals Screw Strut BHP SHP DHP THP EHP
Basic Theory Behind Ship Modeling <ul><li>Modeling a ship </li></ul><ul><li>-   It is not possible to measure the resistan...
Effective Horse Power (EHP) <ul><li>EHP  :  The power required to move the ship hull at a given  </li></ul><ul><li>speed i...
 
 
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آشنایی با انواع شناورها

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آشنایی با انواع شناورها

  1. 1. بسمه‌تعالی آشنايي با انواع شناورها آذر ماه 86
  2. 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. 3. L OA L PP AP FP DWL Sheer تعاريف اوليه و ابعاد اصلي Beam Camber Depth Draft Freeboard WL K C L
  4. 4. Ship Lines: - Body plan (front View) - Shear plan (side view) - Half breadth plan (top view)
  5. 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
  6. 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
  7. 8. انواع شناورهاي غير نظامي Bulk carrier Container carrier Gas tanker General Cargo
  8. 9. Harbor Tug Passenger ship RO-RO Tanker انواع شناورهاي غير نظامي
  9. 10. انواع شناورهاي نظامي Aircraft Carrier Battleship Corvette Cruiser Fast Attack Craft Frigate
  10. 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>
  11. 12. G B WL F B : Resultant Buoyancy force due to the distributed hydrostatics pressure Δ : Resultant weight force due to the distributed weight
  12. 14. SWATH آشنايي با انواع شناورها
  13. 15. SWATH
  14. 16. انواع فرم بدنه شناورهاي مدرن
  15. 17. آشنايي با انواع شناورهاي تندرو High Speed Semi-displacement Round Bilge Hull Form High Speed Hard Chine Form
  16. 18. آشنايي با شناورهاي تندرو Hydrostatic Aerostatic Hydrodynamic Displacement volume below the water surface: Displacement volume above the water surface:
  17. 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
  18. 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
  19. 21. High speed monohull
  20. 22. High speed monohull
  21. 23. Catamaran
  22. 24. Catamaran
  23. 25. Trimaran
  24. 26. Trimaran combat concept vessel
  25. 27. Pentamaran
  26. 28. Wave-piercing Catamaran
  27. 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
  28. 30. Hydrofoils Surface Piercing Fully Submerged آشنايي با انواع شناورهاي تندرو
  29. 31. Hydrofoil vessel
  30. 32. HYSWAS
  31. 33. شناور Hydroplane
  32. 34. شناور Hydroplane
  33. 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
  34. 36. Air Cushion Vehicles Surface Effect Ship Hovercraft آشنايي با انواع شناورهاي تندرو
  35. 37. ACV (Air Cushion Vehicles)
  36. 38. SES
  37. 39. Submarine
  38. 41. انواع شناورها
  39. 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
  40. 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
  41. 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
  42. 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>
  43. 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
  44. 48. Ship Drive Train and Power Ship Drive Train System Engine Reduction Gear Bearing Seals Screw Strut BHP SHP DHP THP EHP
  45. 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
  46. 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
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