métacentre - translation to Αγγλικά
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métacentre - translation to Αγγλικά

MEASUREMENT OF THE INITIAL STATIC STABILITY OF A FLOATING BODY
Metacentre height; Metacenter; Righting moment; Righting arm; Transverse stability; Ship's center of gravity; Ship's center of gravity above keel; Metacentrics; Metacentre; Centre of buoyancy; Meta-center
  • Initially the second moment of area increases as the surface area increases, increasing BM, so Mφ moves to the opposite side, thus increasing the stability arm. When the deck is flooded, the stability arm rapidly decreases.
  • Ship stability diagram showing ''centre of gravity'' (G), ''centre of buoyancy'' (B), and ''metacentre'' (M) with ship upright and heeled over to one side. <br/>As long as the load of a ship remains stable, G is fixed (relative to the ship). For small angles, M can also be considered to be fixed, while B moves as the ship heels.
  • Distance GZ is the ''righting arm'': a notional lever through which the force of buoyancy acts

métacentre      
n. metacenter, center of gravity of a floating body in reference to the center of buoyancy when the body is at equilibrium and when the floating body is inclined (Naval Architecture)
métacentrique      
metacentric, of or pertaining to the metacenter of a floating body (Naval Architecture)

Ορισμός

metacentre
(US metacenter)
¦ noun the point of intersection between an imaginary vertical line through the centre of buoyancy of an level floating vessel and a corresponding line through the new centre of buoyancy when the vessel is tilted.
Derivatives
metacentric adjective

Βικιπαίδεια

Metacentric height

The metacentric height (GM) is a measurement of the initial static stability of a floating body. It is calculated as the distance between the centre of gravity of a ship and its metacentre. A larger metacentric height implies greater initial stability against overturning. The metacentric height also influences the natural period of rolling of a hull, with very large metacentric heights being associated with shorter periods of roll which are uncomfortable for passengers. Hence, a sufficiently, but not excessively, high metacentric height is considered ideal for passenger ships.