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Dynamic positioning ability analyzing method applicable to ocean engineering field

A technology of dynamic positioning and marine engineering, which is applied in the analysis of dynamic positioning capability and the field of dynamic positioning capability analysis. The effect of few

Inactive Publication Date: 2018-02-23
JIANGSU UNIV OF SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a dynamic positioning capability analysis method used in the field of marine engineering to solve the problems of slow calculation speed and unestimable number of solution steps in prior art in dynamic positioning capability analysis and calculation

Method used

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  • Dynamic positioning ability analyzing method applicable to ocean engineering field
  • Dynamic positioning ability analyzing method applicable to ocean engineering field
  • Dynamic positioning ability analyzing method applicable to ocean engineering field

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Embodiment

[0035] This embodiment is used in the dynamic positioning capability analysis method in the ocean engineering field, such as figure 1 shown, including the following steps:

[0036] (1) Establish an environmental load module, including a wind load calculation module, a flow load calculation module and a wave load calculation module, to estimate the lower limit of the wind speed v 1 and upper limit v 2 , given the wind speed accuracy δ and determining the angle of action of the environmental conditions, that is, the angle of attack φ of the ship relative to the wind, current, and waves, the initial angle φ is 0°, and the angle of attack φ of the wind, wave and current is applied to the ship, and the calculation is The average value of wind speed v=(v 1 +v 2) / 2, and then input the average value to the wind load calculation module to calculate the wind load;

[0037] (2) Input the wind load calculated in step (1) into the wave load calculation module to calculate the wave load...

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Abstract

The invention relates to a dynamic positioning ability analyzing method applicable to the ocean engineering field. The method includes the steps of firstly, building an environment load module, and calculating the total environment load; secondly, building a ship acting force module, and calculating ship acting force borne by a ship; thirdly, building a thrust distribution module, superposing thetotal environment load and the ship acting force, inputting into the thrust distribution module, and using an augmented Lagrange algorithm to perform thruster thrust distribution on external load; fourthly, judging conditions that Ti is larger than Timax and v2-v1 is smaller than delta are satisfied or not, if so, determining that v2 is the limit wind speed of the ship under the current environment load, and if not, using a bisection method to perform circulation calculation so as to obtain the limit wind speed; increasing the wind direction angle by one unit, namely 10 degrees, and repeatingthe previous four steps until the calculation of the limit wind speed of all angles within 360 degrees is completed; drawing the dynamic positioning ability curve graph of the ship limit wind speed according to the calculation of the limit wind speed of the 360 degrees.

Description

technical field [0001] The invention relates to an analysis method for dynamic positioning capability, in particular to an analysis method for dynamic positioning capability in the field of ocean engineering. Background technique [0002] As the field of human exploration extends to the vast ocean, the positioning problems of marine structures operating in deep water areas, such as offshore platforms and various working ships, have become increasingly prominent. In shallow water areas, the positioning of marine structures can still be solved by mooring, but as the water depth increases, the cost of mooring positioning increases exponentially, so a new positioning method is needed to solve the problem of marine structure positioning. Dynamic positioning emerged and developed under this background. The dynamic positioning system configured on the marine structure obtains the current position of the structure through satellites or hydroacoustic arrays, and the controller calcu...

Claims

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/15G06F2111/10G06F2119/06
Inventor 苏贞杨奕飞俞孟蕻袁伟李文娟
Owner JIANGSU UNIV OF SCI & TECH
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