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CENTER BUOYANCY [5 records]

Filter results by subject field Alphabetical list of terms

Filter results by subject field

Alphabetical list of terms

Record 1 2017-11-10

English

Subject field(s)
  • Fluid Mechanics and Hydraulics (Physics)
  • Maneuvering of Ships
DEF

The mechanical couple formed by the force of gravity acting downward through the center of gravity and the force of buoyancy acting upward through the center of buoyancy, which tends to restore a vessel to the upright after it has been inclined.

French

Domaine(s)
  • Mécanique des fluides et hydraulique (Physique)
  • Manœuvre des navires
CONT

Pour que le navire soit stable, il faut que le métacentre [...] soit au-dessus du centre de gravité [...] Le couple de rappel [tend] à ramener l'axe de symétrie à la verticale [...]

Spanish

Campo(s) temático(s)
  • Mecánica de fluidos e hidráulica (Física)
  • Maniobras de los buques
Save record 1

Record 2 2003-04-16

English

Subject field(s)
  • Types of Ships and Boats
CONT

A ship that has experienced hogging is said to be hogged. Instead of showing a flat, level hull line, a hogged ship is "curved", with the bow and stern lower than the center of the ship.

OBS

Hogging occurs because the bow and stern of the ship, while carrying a considerable amount of heavy equipment, possesses relatively little buoyancy. The center of the ship, on the other hand, possesses a great deal of buoyancy and may be quite light-weight if the ship is not loaded with heavy cargo or ballast. This unequal distribution of forces, with great weights but little buoyancy fore and aft, and little weight but great buoyancy amidships, leads to deformation of the hull.

French

Domaine(s)
  • Types de bateaux

Spanish

Save record 2

Record 3 2001-06-21

English

Subject field(s)
  • General Mechanics (Physics)
  • Aircraft Piloting and Navigation
DEF

Velocity changes of an object moving along a straight line or vector through the center of gravity.

CONT

Gyroscope drift rate effects are usually classified into three groups. The first group is independent of applied acceleration... The second group includes effects proportional to translational acceleration. This group covers such things as static unbalance of the inner gimbal assembly, i. e., the displacement between the center of support or buoyancy and the center of mass.

French

Domaine(s)
  • Mécanique générale (Physique)
  • Pilotage et navigation aérienne
CONT

Selon [...] [le Principe d'Équivalence (PE) (postulat de Albert Einstein]), un effet d'accélération (inertie) et un effet gravitationnel (attraction entre deux masses gravitationnelles) sont équivalents. [...] les «sphères de Galilée» restent toujours l'idée maîtresse pour tester le PE. Notre idée est de tirer parti de la situation zéro-g pour comparer l'accélération angulaire de deux masses, plutôt qu'une accélération de translation, ce qui nous donnerait l'opportunité de faire «exploser» théoriquement la précision des résultats.

Spanish

Save record 3

Record 4 2001-05-31

English

Subject field(s)
  • Shipbuilding
  • Fluid Mechanics and Hydraulics (Physics)
  • Pleasure Boating and Yachting
  • Equipment (Oil and Natural Gas Extraction)
DEF

The center of gravity of the fluid displaced by a floating body (as a ship or mobile, offshore drilling rig).

DEF

A point through which passes the resultant of all upward forces and by which a floating ship is supported.

CONT

For monohulls, there are two generic forms for these curves, depending roughly on whether the centre of gravity is above or below the centre of buoyancy.

CONT

In vessels of ordinary form it is found that the distance of the center of buoyancy below the load waterline varies from 8/20 to 9/20 of the mean draft to top of keel.

OBS

centre of buoyancy; centre of displacement: terms officially approved by the Naval Terminology Standardization Committee.

French

Domaine(s)
  • Constructions navales
  • Mécanique des fluides et hydraulique (Physique)
  • Yachting et navigation de plaisance
  • Outillage (Extraction du pétrole et du gaz)
DEF

Centre de gravité du liquide déplacé par le volume immergé.

CONT

En fait, le centre de carène théorique (c.c.) situé au centre de la partie immergée de la coque lorsque le bateau au repos flotte à plat, se déplace vers l'extérieur chaque fois qu'une nouvelle section s'immerge à la gîte et supporte le poids.

CONT

Théoriquement, la force de pesanteur s'exerce en un point appelé centre de gravité (CG) et la force de poussée en un autre point ou centre de poussée (CP). [...] En cas de gîte, le CP descend en suivant l'inclinaison et sa verticale se déplace du CG.

CONT

À chaque angle d'inclinaison il se forme un couple de redressement formé d'un côté par le poids du bateau agissant au centre de gravité et de l'autre par la poussée hydrostatique (égale au déplacement) et agissant au centre du volume immergé ou centre de carène.

CONT

La résultante des pressions hydrostatiques s'exerçant sur la carène d'un navire immobile est une poussée verticale, dirigée vers le haut, égale au déplacement et appliquée au centre de carène (principe d'Archimède).

OBS

centre de carène; centre de poussée : termes uniformisés par le Comité de normalisation de la terminologie navale.

Spanish

Campo(s) temático(s)
  • Construcción naval
  • Mecánica de fluidos e hidráulica (Física)
  • Vela y navegación de placer
  • Equipo para extracción de petróleo y gas natural
Save record 4

Record 5 2000-04-26

English

Subject field(s)
  • Shipbuilding
DEF

The intersection of a vertical line through the center of buoyancy of a floating body, slightly displaced from its equilibrium position, with a line connecting the center of gravity and the equilibrium center of buoyancy; the floating body is stable if the metacenter lies above the center of gravity.

CONT

The location of the metacenter is important because it affects the stability of floating vessels (as mobile, offshore drilling rigs.

French

Domaine(s)
  • Constructions navales
CONT

L'équilibre est stable ou instable suivant que le métacentre est au-dessus ou au-dessous du centre de gravité.

OBS

métacentre : terme uniformisé par le Comité de normalisation de la terminologie navale.

Spanish

Campo(s) temático(s)
  • Construcción naval
Save record 5

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