A model for Quick Load Analysis for monopile-type offshore wind turbine substructures

The Science of Making Torque from Wind

Schløer, Signe^1 ; Castillo, Laura Garcia^2 ; Fejerskov, Morten^2 ; Stroescu, Emanuel^2 ; Bredmose, Henrik^1

Technical University of Denmark, Nils Koppels Allé, Building. 403, DK-2800 Kgs. Lyngby, Denmark^1

Universal Foundation, Langerak 17, DK-9220 Aalborg øst, Denmark^2

关键词: Dynamic structural response;    Equation of motion;    Extreme loads;    Fatigue loads;    Frequency domains;    Load analysis;    Model simplification;    State of the art;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/753/9/092008/pdf
DOI  :  10.1088/1742-6596/753/9/092008

来源: IOP

【 摘 要 】

A model for Quick Load Analysis, QuLA, of an offshore wind turbine substructure is presented. The aerodynamic rotor loads and damping are precomputed for a load-based configuration. The dynamic structural response is represented by the first global fore-aft mode only and is computed in the frequency domain using the equation of motion. The model is compared against the state of the art aeroelastic code, Flex5, and both life time fatigue and extreme loads are considered in the comparison. In general there is good similarity between the two models. Some derivation for the sectional forces are explained in terms of the model simplifications. The difference in the sectional moments are found to be within 14% for the fatigue load case and 10% for the extreme load condition.