EP 2.Buoyancy and stability

Principle of Buoyancy and Stability

1.  Archimedes Principle’s Law: a body floating or submerged in a fluid is buoyed up by a force equals to the weight of the water it displaces.

Archimedes' Principle

ที่มา: https://physics.weber.edu/carroll/archimedes/principle.htm

2.  Depth to which vessel sinks depends on density of water (r = 1 ton/35ft³ seawater, or 1.025 tonnes/m3), vessel sinks until weight of water displaced by the underwater volume is equal to the weight of the vessel.

ที่มา: https://byjus.com/physics/density-of-water/#What-is-the-Density-of-Water?

EP 1.Barge general details

Terminology, Definition and Principal Dimensions

  • Perpendiculars – Imaginary lines perpendicular to the base line or plane (and the waterline)
  • Forward Perpendiculars (Fpp or Fp) – This is the line crosses the intersection of the waterline and the front of the stem
  • Aft Perpendicular (App or Ap) – This line usually aligns the center line of the rudder stock. This is the imaginary line around which the rudder rotates.
  • Plimsoll Mark (freeboard mark) – The freeboard mark is a symbol indicating the maximal immersion of the ship in the water, leaving a minimal freeboard for safety.

 

ที่มา: https://www.sciencedirect.com/topics/engineering/forward-perpendicular