metacenter

简明释义

英[ˈmetəˌsentə(r)]美[ˈmetəˌsentər]

n. 外心点；[流] 定倾中心

英英释义

单词用法

同义词

反义词

例句

1.As underwater depth increases, metacenter height increases, but water entry Angle decreases, so the platforms allowable swing angles also decrease.

随着吃水深度的增加，平台的稳心高变大，但平台入水角减小，所以平台的容许摆动幅度降低。

2.As underwater depth increases, metacenter height increases, but water entry Angle decreases, so the platforms allowable swing angles also decrease.

随着吃水深度的增加，平台的稳心高变大，但平台入水角减小，所以平台的容许摆动幅度降低。

3.A higher metacenter typically indicates better stability for a boat in rough waters.

较高的重心通常表明船只在恶劣水域中的稳定性更好。

4.When analyzing ship stability, engineers often refer to the height of the metacenter above the center of gravity.

在分析船舶稳定性时，工程师通常会参考重心上方的重心高度。

5.In naval architecture, calculating the metacenter helps designers create safer vessels.

在船舶设计中，计算重心有助于设计师创造更安全的船只。

6.The metacenter is crucial for determining how a ship will respond to tilting forces.

对于确定船只如何响应倾斜力来说，重心至关重要。

7.The stability of a floating vessel can be determined by its position relative to the metacenter.

浮动船只的稳定性可以通过其相对于重心的位置来确定。

作文

In the field of naval architecture and marine engineering, the term metacenter refers to a crucial point that plays a significant role in determining the stability of floating bodies, such as ships and boats. The metacenter is defined as the point where the buoyant force acts when a vessel is tilted at a small angle. Understanding the concept of metacenter is essential for designing vessels that can withstand various conditions at sea without capsizing. When a ship is upright, its center of gravity (G) is located directly below the metacenter (M). However, when the ship tilts due to external forces like wind or waves, the buoyant force shifts. The metacenter moves accordingly, and the stability of the vessel depends on the relationship between these two points. If the metacenter is above the center of gravity, the vessel is considered stable; it will return to an upright position after being disturbed. Conversely, if the metacenter is below the center of gravity, the vessel becomes unstable and may capsize. The height of the metacenter above the center of gravity is known as the metacentric height (GM). A larger GM indicates better stability, which is why naval architects strive to design ships with a high metacenter. This can be achieved by lowering the center of gravity through careful weight distribution and hull design. For instance, placing heavy machinery and cargo low in the ship helps raise the metacenter, enhancing stability. Moreover, the metacenter is not a fixed point; it can change based on the shape of the hull and the distribution of weight on board. Different designs, such as catamarans or trimarans, have unique characteristics that affect their metacenter and overall stability. Understanding these variations is vital for engineers and designers who aim to create safe and efficient vessels. In practical terms, sailors and captains must also consider the metacenter when navigating through rough waters. A vessel with a low metacenter may be more prone to rolling and instability, requiring careful maneuvering and ballast adjustments to maintain safety. Additionally, during loading and unloading operations, the distribution of weight affects the metacenter, making it critical for crew members to monitor and adjust loads accordingly. In conclusion, the concept of metacenter is fundamental to understanding the stability of floating vessels. It encompasses various aspects of naval design, safety, and practical navigation. By mastering the principles surrounding the metacenter, naval architects and seafarers can ensure that vessels are not only functional but also safe in the unpredictable environment of the sea. As technology advances, the study of the metacenter continues to evolve, contributing to the development of more sophisticated and resilient maritime vessels.

在船舶建筑和海洋工程领域，术语metacenter指的是一个关键点，它在确定漂浮物体（如船只和小艇）的稳定性方面发挥着重要作用。metacenter被定义为当船只倾斜到一个小角度时，浮力作用的点。理解metacenter的概念对于设计能够在海上承受各种条件而不倾覆的船舶至关重要。当船只直立时，其重心（G）位于metacenter（M）正下方。然而，当船只因外力（如风或波浪）倾斜时，浮力位置会发生变化。metacenter也随之移动，船舶的稳定性取决于这两个点之间的关系。如果metacenter位于重心之上，则船舶被认为是稳定的；在受到干扰后，它会恢复到直立位置。相反，如果metacenter位于重心之下，则船舶变得不稳定，可能会倾覆。metacenter高于重心的高度称为曲率高度（GM）。更大的GM表示更好的稳定性，这就是为什么船舶建筑师努力设计具有高metacenter的船舶。这可以通过谨慎的重量分配和船体设计来降低重心。例如，将重型机械和货物放置在船只底部有助于提高metacenter，增强稳定性。此外，metacenter不是一个固定的点；它可以根据船体的形状和船上重量的分布而变化。不同的设计，如双体船或三体船，具有独特的特性，影响其metacenter和整体稳定性。理解这些变化对工程师和设计师而言至关重要，他们旨在创造安全高效的船舶。在实际操作中，水手和船长在通过恶劣水域航行时也必须考虑metacenter。具有低metacenter的船舶可能更容易发生摇摆和不稳定，这需要小心操控和调整压载以保持安全。此外，在装卸操作期间，重量的分配会影响metacenter，这使得船员必须监测并相应调整负载。总之，metacenter的概念是理解漂浮船舶稳定性的基础。它涵盖了船舶设计、安全和实际导航的各个方面。通过掌握与metacenter相关的原则，船舶建筑师和海员可以确保船舶不仅功能齐全，而且在不可预测的海洋环境中安全。随着技术的进步，metacenter的研究继续发展，有助于开发出更复杂和更具韧性的海洋船舶。