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A Method of Analyzing Dynamic Positioning Capability 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: 2017-02-08
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.

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  • A Method of Analyzing Dynamic Positioning Capability Based on Dichotomy
  • A Method of Analyzing Dynamic Positioning Capability Based on Dichotomy
  • A Method of Analyzing Dynamic Positioning Capability Based on Dichotomy

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Embodiment Construction

[0028] Specific implementation plan

[0029] In order to make it easy to understand the technical means, creative features, objectives and effects achieved by the present invention, the present invention will be further explained below with reference to the accompanying drawings and embodiments.

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

[0031] First perform step 1 to determine the binary judgment function I, according to the definition:

[0032] I = 1 , x A A 0 , x ∉ A

[0033] Perform step 2 to determine the wind force interval [a, b]. The initial value formula suggested by this method is:

[0034] a = α · V max 90 b = β · V max 180

[0035] According to the actual wo...

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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 of 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 ocean platforms and various work boats, have become increasingly prominent. In shallow water areas, the positioning of marine structures can still be solved by mooring, but with the increase of water depth, the cost of anchoring positioning is increasing exponentially, so a new positioning method is needed to solve the problem of marine structure positioning. Dynamic positioning emerged and developed in this context. The dynamic positioning system configured on the marine structure obtains the current position of the structure through satellite or hydroacoustic array, and the controller calculates the thrust and torque re...

Claims

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Application Information

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Patent Type & Authority Patents(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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