English Dictionary

metacentre

IPA（発音記号）

/ˈmɛtəsɛntə/

名詞

(physics, nautical) The point where a vertical line through a tilted vessel's center of buoyancy intersects the originally-vertical (but-now-tilted) line that passed through the center of buoyancy when the vessel was upright; it must be above the vessel's center of gravity for the vessel to have positive static stability (to tend to return to an upright orientation if rolled to one side, rather than to continue rolling to an inverted orientation).

日本語の意味

物理学・海洋学において、船やその他の浮体が傾いた際、元々垂直に浮心を通っていたラインと、傾斜状態で浮力の中心を通る垂直線との交点を指す。この交点（メタセンター）が、安定性を保つために船体の重心より上に位置している必要がある。

The naval architect calculated the metacentre before finalizing the hull design to ensure the vessel would right itself after tilting.

海事設計者は、船が傾いたときの浮力中心を通る鉛直線と直立時に浮力中心を通っていた鉛直線との交点を設計の最終決定前に計算し、船が傾いても自力で直立に戻ることを確認した。

意味（1）

(physics, nautical) The point where a vertical line through a tilted vessel's center of buoyancy intersects the originally-vertical (but-now-tilted) line that passed through the center of buoyancy when the vessel was upright; it must be above the vessel's center of gravity for the vessel to have positive static stability (to tend to return to an upright orientation if rolled to one side, rather than to continue rolling to an inverted orientation).

A ship's metacenter (M) is the virtual intersection of two successive lines of action of the force of buoyancy when the ship heels through a very small angle. The initial position of the metacenter is used as a reference in stability calculations. The distance from a ship's center of gravity (G) to its metacenter is known as the metacentric height (GM). GM is a measure of the vessel's ability to right itself when experiencing an overturning moment. For the same vessel, a higher GM value indicates a greater initial static stability.

metacentres （ plural ）