righting arm - definition. What is righting arm
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%ما هو (من)٪ 1 - تعريف

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

Metacenter         
·noun ·Alt. of -tre.
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
Metacentre         
·noun The point of intersection of a vertical line through the center of gravity of the fluid displaced by a floating body which is tipped through a small angle from its position of equilibrium, and the inclined line which was vertical through the center of gravity of the body when in equilibrium.

ويكيبيديا

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.