Offshore wind turbine foundation full-time coupling fatigue analyzing method and system

Abstract

The invention relates to an offshore wind turbine foundation full-time coupling fatigue analyzing method and system. The method includes utilizing SACS software to build an offshore wind turbine foundation and a tower model; outputting a foundation structure data file precede.$PJ; operating BLADED software to read the foundation structure data file precede.$PJ and conducting fatigue work condition load calculation; operating the SACS software to read fatigue load under various work conditions and calculated through the step C and corresponding spectrum parameters, calculating and accumulating fatigue damage under various work conditions and calculating the fatigue service life. The system comprises a modeling module, a model output and storage module, a fatigue work condition load calculation module and a fatigue service life calculation module. By means of the method and system, fatigue calculation and frequency domain and time domain analysis under wind wave flow full-time coupling and fatigue coupling analysis with fatigue load work conditions combined with spectrum curves can be conducted on an offshore wind turbine foundation.

Description

technical field [0001] The invention relates to a fatigue analysis method and system of an offshore wind turbine, in particular to a full-time coupling fatigue analysis method and system for an offshore wind turbine foundation under wind, wave and current loads. Background technique [0002] Offshore wind resources are abundant. Generally, the offshore wind speed 10km offshore is 25% higher than that on land along the coast, and the wind resources in the deep sea area are more abundant than those in the offshore area. According to statistics, the offshore wind resources in the US sea area at a water depth of 60-900m reached 1533GW, while the offshore water area of ​​0-30m was only 430GW. According to the research conducted by the Energy Research Institute of the National Development and Reform Commission and other institutions, the wind energy resources in the water depths of 10m, 20m and 30m in China's offshore waters are about 1×10 8 kW, 3×10 8 kW and 4.9×10 8 kW. Cal...

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Problems solved by technology

For the foundation of offshore wind turbines, it must bear the coupling effect of wave spectrum + time history force at the same time, which requires engineers to solve how to carry out fatigue calculation under full time coupling of wind, wave and flow, how to carry out frequency domain + time domain coupling analysis, how to Combining the N fatigue load conditions of the wind turbine with the wave spectrum curve for fatigue coupling analysis and other technical problems, there is currently no effective means and solutions to solve the above technical problems at home and abroad

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