Upload
tanamesh
View
17
Download
0
Embed Size (px)
Citation preview
Ship maneuvering
CHAPTER 3: THEORIES OF SHIP
MANEUVERING (SHIP INTERACTIONS)
CAPTAIN TANAMESH PUSANASURAPUNT
Fixed Screw Propeller
Single Fixed Screw Propeller
Larger Ship
Ship-Handling with 4 Tugs
Berthing with 5 Tugs
Ship-Handling with 4 Tugs
0900 - 1200
Daniel Bernoulli
+ gz + p = Constant 2 ρ
v: Fluid Flow Speed g: Acceleration due to gravity
z: Elevation of Point Above Reference Planep: Pressureρ: Density of Fluid
Bernoulli’s PrinciplesBernoulli’s Equation
For Uncompressed Flow (Fluid)
Bernoulli’s Equation For Uncompressed Flow (Fluid)
+ + p + gz = F(t) 2 ρ
: Partial Differentiation of Velocity ϕ at Time t g : Acceleration due to gravity
z : Elevation of Point Above Reference Plane p : Pressure ρ : Density
Bernoulli’s PrinciplesBernoulli’s Differential Equation
For Compressed/ Unsteady Flow (Gases)
Bernoulli’s Differential Equation For Compressed/ Unsteady Flow (Gases)
Aerodynamic
COASTAL AREA WHERESHIP INTERACTIONS OFTEN
HAPPEN
Shallow Water Effect
Bank Effect
Shallow Water Effect
SHALLOW WATER EFFECT
(SWE)
CAPTAIN TANAMESH PUSANASURAPUNT
Shallow Water Effects
Shallow Water Effects
เรื�อ Braer ปี� 1993 สกิอตแลนด์� น���มั�นด์บ 85 ล��นลตรื ส�เหต�เกิยต��น
BANK EFFECT (BE)
CAPTAIN TANAMESH PUSANASURAPUNT
Bank Effects
Bank Effects
SUCTION
SPRING OUT THE BANK (Kicking Techniques)
Kicking
SQUAT (SQUAT)
CAPTAIN TANAMESH PUSANASURAPUNT
SQUAT (Keel)
SQUAT (Keel)
Squat
SQUAT (Stern)
POTENTIAL SQUAT (Stern)
SQUAT (Bow)
กิรืณี�เรื�อเด์นหน��- ทรืมัห�ว
W
P
เปี�นสถ�นกิ�รืณี�ท�!ไมั#พึ%งปีรืะสงค์�อย#�งย!ง - ไมั#ส�มั�รืถค์�ด์เด์�อ�กิ�รืเรื�อได์� Wind
POTENTIAL SQUAT (Bow)
Squat is expected when depth < 1.5 draft Squat value should be greater of Value provided in maneuvering data
10 % of draft 0.3 m for every 5 knots Ship with CB greater than 0.75 tends to squat by head
Bernoulli's Principle
Applications
SHIP INTERACTION
CAPTAIN TANAMESH PUSANASURAPUNT
Positive Pressure (+) and Positive Pressure (+)=> Push ApartPositive Pressure (+) and Negative Pressure (-)=> SuctionNegative Pressure (+) and Negative Pressure (-)=> Suction
SHIP PASSING
CAPTAIN TANAMESH PUSANASURAPUNT
Ships Passing
SHIPS OVERTAKING
CAPTAIN TANAMESH PUSANASURAPUNT
Ships Overtaking
Ships Overtaking
Ships Overtaking
Ships Overtaking
TURNING AT THE BEND
CAPTAIN TANAMESH PUSANASURAPUNT
1 Possibility : Keep Inside, With Right Rudder to Bow Straight AheadIf Aft closes to the bank, 2 Choices : Kicking Ahead, or Putting Sternway
เล��ยวท�!โค์�งแมั#น���ต�มัน���
Potential Squat
1 Possibility : Keep Inside, With Right Rudder to Bow Straight AheadIf Aft closes to the bank, 2 Choices : Kicking Ahead, or Putting Sternway
เล��ยวท�!โค์�งแมั#น���ต�มัน���Potential
Squat
เล��ยวท�!โค์�งแมั#น���ทวนน��� Keep inside of the Bend, Ship May Aground (Be careful the Opposite Turning Moment)
Potential Squat
กิล�บล�� ณี จุ�ด์ค์��งแมั#น���(แล#นต�มัน��� ท�!ค์��งแมั#น���)
กิรืะแสน���1
23
4
กิล�บล�� ณี จุ�ด์ค์��งแมั#น���(แล#นต�มัน��� ท�!ค์��งแมั#น���)
กิรืะแสน���
1
2
3
THE END