A Fatigue Analysis System for Offshore Wind Turbines Based on Global Coupling Model

Abstract

The invention discloses an offshore wind turbine fatigue analysis system based on an integrated coupling model and belongs to the technical field of long-term fatigue coupling analysis of an integral structure of an offshore wind turbine. The fatigue analysis system comprises a design wind speed simulation module, an integrated coupling model establishing module, a coupled power reaction analysis module, a fatigue condition setting module, a fatigue loading file generation and integrated coupling fatigue analysis module and other computation modules. The fatigue analysis method comprises the following steps: establishing an integrated coupling model of a rotor-control-cabin-tower-foundation structure; calling FAST by utilizing a FAST-SACS joint analysis interface, and developing coupled power reaction analysis; reading a coupling analysis destination file by the joint analysis interface, generating an input file and a computing configuration file needed by fatigue analysis, and outputting the files to a designated directory; establishing a simplified integrated model of a mass point-tower-foundation structure, and developing offshore wind turbine integrated structure fatigue analysis under the wind flow combined action based on the generated input file and computing configuration file; and finally, obtaining long-term fatigue accumulation of the structure based on a wind turbine fatigue accumulation criterion.

Description

technical field [0001] The invention relates to an offshore wind turbine fatigue analysis system based on an overall coupling model, and belongs to the technical field of long-term fatigue coupling analysis of the overall structure of the offshore wind turbine. Background technique [0002] my country's offshore wind energy reserves are abundant, and the newly promulgated national 13th Five-Year Development Plan clearly points out that the proportion of offshore wind power should be increased in terms of grid-connected power generation and resource development. Compared with onshore wind power, the development cost of offshore wind power is higher, mainly because offshore wind power will face more complex operating conditions and environmental loads. At present, my country's offshore wind power industry is developing rapidly, but my country's offshore wind power design technology is still immature, and there is still a big gap compared with the international advanced level. ...

AI Technical Summary

Problems solved by technology

At present, the structure design of offshore wind power in my country mostly adopts the semi-integral method, and the main defect of this method is that it cannot fully consider the coupling effect between the environmental load and the structural response and the influence of aerodynamic damping on the basic structural response.

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