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Conversion method for ship turning performance

A ship and performance technology, applied in the field of ship slewing performance conversion, can solve problems such as complex calculation methods of ship slewing performance, and achieve the effect of simplifying the calculation method

Inactive Publication Date: 2015-10-07
SHANGHAI WAIGAOQIAO SHIP BUILDING CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is the defect that the calculation method of the existing ship slewing performance is complex, and a method for converting the ship slewing performance is provided

Method used

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  • Conversion method for ship turning performance

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Experimental program
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Embodiment

[0021] Please combine figure 1 It should be understood that a method for converting ship turning performance includes the following steps:

[0022] S1: Choose the Hefgart formula for theoretical estimation of ship turning performance: Among them, D T0 Is the tactical diameter with no trim and a speed-length ratio of 1, C 1 Is the speed correction factor, C 2 Is the trim correction factor; K 3 Is the correction coefficient when there is no trim and the speed-length ratio is 1, Is the drainage volume, A R Is the rudder area, δ is the rudder angle, V is the speed, L is the hull length, C n The calculation formula is: Determine the conversion factors that affect the tactical diameter of the ship's slewing performance test as rudder angle, trim, speed, and drainage volume;

[0023] S1.1: In terms of drainage volume Is a variable, speed correction coefficient C 1 , Trim correction coefficient C 2 、The rudder angle δ is constant, carry out more than four tests to obtain the longitudina...

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Abstract

The present invention discloses a conversion method for a ship turning performance. The conversion method comprises the following steps of: S1: selecting a ship turning performance theoretical estimation formula, and determining conversion factors that influence a tactical diameter of a ship turning performance test; S2: analyzing the influence degree of each conversion factor by using a statistical method; S3: carrying out an quantitative analysis on a variation rule of ship turning circles when drainage volumes are different, so as to obtain a conversion method for the tactical diameter of the ship turning circles; and S4: according to the conversion method, obtaining calculation formulas of longitudinal and transverse distances of the ship turning circles. The conversion method for the ship turning performance, disclosed by the present invention, has the advantages that test cost is reduced and efficiency is improved.

Description

Technical field [0001] The invention relates to a method for converting ship turning performance. Background technique [0002] Ship slewing performance is one of the ship's maneuverability indicators. When a ship with good slewing performance is sailing at sea, it is easy to steer and manoeuvre, it is convenient to bypass other ships or obstacles, and avoid collision and marine accidents, which is of great significance to ship navigation safety. [0003] In the past, very complicated formulas were used for the conversion of ship slewing performance. If a tank model test is performed, the cost is very high, the cycle is long, and the sea trial cost is increased. Summary of the invention [0004] The technical problem to be solved by the present invention is the complicated defect of the existing ship turning performance calculation method, and provides a ship turning performance conversion method. [0005] The present invention solves the above technical problems through the followin...

Claims

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Application Information

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IPC IPC(8): G06F19/00
Inventor 吴兆阳
Owner SHANGHAI WAIGAOQIAO SHIP BUILDING CO LTD