Rapid estimation method of inherent rolling moving period of conventional ship

An inherent motion, conventional technology, used in equipment to reduce ship motion, equipment to increase ship stability, and ship parts, etc., can solve the problems of inaccurate estimation results and large deviations, and achieve simple and easy-to-understand methods and estimation results. Precise and reliable results

Inactive Publication Date: 2015-12-16
CNPC BOHAI EQUIP MFG +1
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  • Abstract
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  • Application Information

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Problems solved by technology

It overcomes the inaccurate estimation result and large deviation of the calculation formula of the natural period of motion of the conventional ship roll

Method used

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  • Rapid estimation method of inherent rolling moving period of conventional ship
  • Rapid estimation method of inherent rolling moving period of conventional ship
  • Rapid estimation method of inherent rolling moving period of conventional ship

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Embodiment Construction

[0009] Such as figure 1 , figure 2 As shown, a method for quickly estimating the natural period of motion of a conventional ship rolling, the conventional ship involved in the present invention refers to a monohull, the outer plate of the hull is continuous, the length L of the ship is not more than 400m, and the width B is not more than 400m. Over 100m, the ratio of length to breadth L / B shall not be less than 3. The formula for calculating the natural motion period of rolling of conventional ships when the draft is D meters is: in f a = 0.0688 · B D + 0.8269 , f b = - 0.027 · K G D + 1.0537 ; in The unit is second, D is the draft of the ship, the unit is meter; B is th...

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Abstract

The invention relates to the technical field of ship design, in particular to a rapid estimation method of an inherent rolling moving period of a conventional ship. The method comprises the following steps: acquiring the following data of B, D, KG and GM0, and then rapidly estimating the inherent rolling moving period T theta of the ship according to a formula shown in the description. The method disclosed by the invention is concise, easy to understand, and accurate and reliable in estimated results. The method overcomes the defects that a conventional estimation method of an inherent rolling period of a conventional ship is inaccurate in estimated results and large in deviation.

Description

Technical field: [0001] The invention relates to the technical field of ship design, in particular to a method for quickly estimating the natural motion period of conventional ship roll. Background technique: [0002] Different textbooks or codes give different formulas for estimating the natural period of motion of conventional ships’ roll. Conventional ships refer to monohull ships with continuous hull plating. B is not more than 100m, and the ratio L / B of the length of the ship to the breadth of the ship is not less than 3. For the same ship type, the results calculated by using these different formulas are often quite different, and the deviation from the real value is also large, which brings confusion to ship designers. Invention content: [0003] The technical problem to be solved by the present invention is to provide a method for quickly estimating the natural period of motion of conventional ship roll, which realizes simple and easy-to-understand methods and acc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B63B39/00B63B9/00
Inventor 林海花孙承猛张晓宇樊岩松赵云鹤姚湘琳周佳甘作为于明阳周立师
Owner CNPC BOHAI EQUIP MFG
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