metacentre

/'metə,sentə/ Cách viết khác : (metacentre) /'metə,sentə/

Thân thiện

A naval architect marks the metacentre on a ship's stability diagram.

Definition

1. Noun:
   • The point of intersection between two vertical lines, one through the center of buoyancy of a floating body in equilibrium and the other through the center of buoyancy when the body is tilted; a key parameter for assessing stability. In naval architecture and hydrostatics, the metacentre is a theoretical point used to calculate the initial static stability of a ship or other floating vessel. Its height relative to the vessel's center of gravity determines whether the vessel will tend to return to an upright position (stable) or capsize (unstable) when heeled.

Examples of Usage

• Noun:
  • The naval architect calculated the metacentre to ensure the new design had adequate stability.
  • A high metacentre generally indicates high initial stability but can lead to a quick, uncomfortable rolling motion.
  • The distance between the center of gravity and the metacentre is called the metacentric height.

Advanced Usage

• "Metacentric height (GM)": The vertical distance between the center of gravity (G) and the metacentre (M). This is the primary measure of a ship's initial static stability.
  • A positive metacentric height means the ship is stable and will right itself when tilted.
• "Transverse metacentre": The metacentre for rolling (side-to-side) motion, which is the most common consideration for stability.
• "Longitudinal metacentre": The metacentre for pitching (fore-and-aft) motion.

Variants and Related Words

• Metacenter: The American English spelling of .
• Metacentric (adjective): Of or relating to the metacentre.
  • The metacentric height was carefully monitored during loading.

Synonyms

• Stability point (conceptual synonym in naval architecture).

Related Concepts (Not Phrasal Verbs or Idioms)

• Center of Buoyancy (B): The center of mass of the volume of water displaced by the hull.
• Center of Gravity (G): The point where the entire weight of the vessel is considered to act.
• Righting Arm / Righting Moment: The force that returns a heeled vessel to upright, directly influenced by the metacentric height.

Học thuật

Noun

1. (shipbuilding) the point of intersection between two vertical lines, one line through the center of buoyancy of the hull of a ship in equilibrium and the other line through the center of buoyancy of the hull when the ship is inclined to one side; the distance of this intersection above the center of gravity is an indication of the stability of the ship

Từ đồng nghĩa

• metacenter