tâm nghiêng
Definition
- Noun (Physics / Naval Architecture):
- Metacentre: The theoretical point at which an imaginary vertical line through the centre of buoyancy of a floating body intersects another imaginary vertical line through a new centre of buoyancy when the body is tilted or inclined. It is a crucial concept for assessing the initial static stability of ships and other floating vessels.
Usage Examples
- Noun:
- Vị trí của tâm nghiêng quyết định độ ổn định của con tàu. (The position of the metacentre determines the ship's stability.)
- Các kỹ sư phải tính toán tâm nghiêng khi thiết kế thuyền. (Engineers must calculate the metacentre when designing boats.)
Advanced Usage
- "Độ cao tâm nghiêng" (Metacentric height): The vertical distance between the centre of gravity and the metacentre. A larger metacentric height generally indicates greater initial stability but a quicker, sometimes uncomfortable, rolling motion.
- Độ cao tâm nghiêng đủ lớn là cần thiết cho tàu chở hàng. (A sufficiently large metacentric height is necessary for a cargo ship.)
Variants and Related Words
Tâm nổi (n): Centre of buoyancy. The centre of mass of the volume of water displaced by a floating body.
- Tâm nổi dịch chuyển khi tàu nghiêng. (The centre of buoyancy shifts when the ship heels.)
Tâm ổn định (n): A general term for a centre of stability, often referring to the metacentre.
Synonyms
- Metacenter: The American English spelling of "metacentre".
Related Concepts
- Ổn định tĩnh ban đầu (Initial static stability): The stability of a vessel at small angles of heel, directly analyzed using the metacentre.
- Moment phục hồi (Righting moment): The moment that tends to restore a tilted vessel to an upright position, dependent on the metacentric height.