Deep-sea SPAR floating-type draught fan fatigue damage analysis method taking vortex-induced effect into account

A technology of fatigue damage and analysis methods, applied in geometric CAD, computer-aided design, special data processing applications, etc., can solve problems such as complex fatigue analysis

Inactive Publication Date: 2018-06-29
OCEAN UNIV OF CHINA
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Problems solved by technology

Especially for the SPAR floating fan, due to its unique deep-draft single-column structure, its fatigue analysis is more complicated, and there are few effective fatigue damage analysis methods for SP

Method used

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  • Deep-sea SPAR floating-type draught fan fatigue damage analysis method taking vortex-induced effect into account
  • Deep-sea SPAR floating-type draught fan fatigue damage analysis method taking vortex-induced effect into account
  • Deep-sea SPAR floating-type draught fan fatigue damage analysis method taking vortex-induced effect into account

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Embodiment Construction

[0051] The mooring cable of offshore wind turbine is a very important part of the wind turbine. Its function is to control the position of the floating wind turbine. Therefore, the safety and applicability of the mooring cable are also extremely critical.

[0052] Compared with other types of floating fans, the unique deep-draft single-column structure of the SPAR floating fan results in an excessively large front flow area. Under the action of the incoming flow, the vortex shedding is likely to occur behind the fan base structure, and then the vortex induced by the fan occurs. movement phenomenon. The vortex-induced motion for a long time may lead to the damage of the mooring system. Therefore, when studying the motion response of the SPAR-type floating fan and the fatigue life of the mooring cable, the influence of the vortex-induced motion phenomenon must be considered. The research results will guide the future Engineering design has important reference and guiding signifi...

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Abstract

The invention discloses a deep-sea SPAR floating-type draught fan fatigue damage analysis method taking a vortex-induced effect into account. The method includes the following steps of (1) analyzing avortex-induced movement phenomenon of a SPAR-type floating-type draught fan, and obtaining the overall force characteristics, movement trails and response frequency of the SPAR-type floating-type draught fan; (2) on the basis of FAST software, under a working sea condition and a survival sea condition, analyzing a movement response time interval of the SPAR-type floating-type draught fan and theforce condition of tied cables under the combined action of a wind load, a wave load and a current load; (3) according to a Miner linear fatigue damage superposition theory, S-N curves and a rain-flowcounting method, compiling an MATLAB program, conducting fatigue damage analysis under the action of a vortex-induced load and wave load of the draught fan separately, and correspondingly obtaining the total fatigue damage of the tied cables within the design life to provide an effective settlement strategy for accurately evaluating power response of the floating-type draught fan and the fatiguedamage of the tied cables.

Description

technical field [0001] The invention relates to the research field of fatigue damage of a SPAR type floating fan, in particular to a method for analyzing fatigue damage of a deep sea SPAR type floating fan considering vortex induced effects. Background technique [0002] As the most important form of wind energy utilization, wind power generation has attracted more and more attention from all over the world. Compared with onshore wind farms, offshore wind farms have high wind speed, stable wind conditions, less land resource occupation, long working hours and are suitable for large-scale Relatively speaking, the development prospect of offshore wind power is very broad. However, as the working water depth of offshore wind turbines gradually increases, the working environment of wind turbines has become more and more complex. The continuous changes of main loads such as wind load, wave load and current load have caused fatigue damage to the wind turbine system. The analysis o...

Claims

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/17G06F2119/04Y02E60/00
Inventor 桑松
Owner OCEAN UNIV OF CHINA
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