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Method for performing dynamic positioning ability analysis based on dichotomy

A technology of dynamic positioning and capability analysis, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve problems such as slow solution process

Active Publication Date: 2014-09-17
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the disadvantage of this method is that the solution process is slow. In the process of solving, it is usually necessary to traverse all the values ​​in the calculation domain to determine whether there is a feasible solution.

Method used

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  • Method for performing dynamic positioning ability analysis based on dichotomy
  • Method for performing dynamic positioning ability analysis based on dichotomy
  • Method for performing dynamic positioning ability analysis based on dichotomy

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Embodiment Construction

[0028] specific implementation plan

[0029] In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0030] figure 1 To obtain the maximum wind speed flow chart for the dichotomy method, according to the flow chart, we analyze it in combination with specific examples. A semi-submersible platform needs to analyze the dynamic positioning capability, and the analysis angle is from 0° to 180°.

[0031] First execute step 1 to determine the dichotomous judgment function I, according to the definition formula:

[0032] I = 1 , x ∈ A 0 , ...

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Abstract

The invention provides a method for performing the dynamic positioning ability analysis based on the dichotomy. The method comprises the steps of formulating a dichotomy judgment function I; determining a wind speed action range [a, b]; setting a solving error tolerance epsilon as 1 m / s; calculating and updating the wind speed action range; estimating the overall optimization step number. The method for performing the dynamic positioning ability analysis based on the dichotomy can obtain the maximum environmental force (generally expressed by the maximum wind speed) resisted under different heading angles of the ocean structure, the solving process is simplified, the solving efficiency is improved, and the stability is better compared with the traditional method.

Description

technical field [0001] The invention relates to a method for dynamic positioning capability analysis, especially for marine structures with multiple propeller types or multiple propellers. 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 calculates the thrust and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F19/00
Inventor 王磊徐胜文金鑫汪学锋邱荷珍
Owner SHANGHAI JIAO TONG UNIV
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