Floating Wind Turbine Load Calculation Method For The Research

Floating wind turbines are suited to deep-sea environment, relative to save costs and materials. Foreign countries have carried out of some major offshore wind power related theory and practice research, had successfully grided prototype, for floating wi-nd turbine research started relatively early. The State for this type of wind turbines was still in the stage of theoretical exploration and related technology is stil not matu-re, only to reference in similar drilling platform infrastructure. Based on the 2.0 MW offshore floating Spar type wind turbines, with the help of GH- bladed software platform for the wind turbines blade, towe and platform of loads simulation for analysis.For the specific work:(1)On the present situation and prospect of offshore wind power are described briefly, focus on foreign floating wind turbines current in load and platform dynamic aspects of the research literature search and reading.(2) Analysis of the most popular three floating platform(Spar, TLP and semi-submersible type) of the structure and performance of the mooring line material, the mechanical analysis of the mooring line. And environmental load of simple introduction on the Marine wind turbines, was designed in this paper, Spar floating foundation of 2.0 MW for selection of parameters.(3) All kinds of load calculation need the method of load theory. Article respectively established the blade, the tower drum and platform coordinate system, the vibration of the load in order to simplify the calculation steps for the purpose of selecting the origin point.For the calculation of wave load mainly through from ship wave force analysis of the offshore structure, use of morison formula of wave theory, and to improve the Morrison formula, perfecting the Morrison formula in the axial of swing and vibration response curve,supplement the platform in the direction of the heaving load.(4) Using the bladed software to test and verify the simulation of blades, towerand platform(the rigid connection of the tower body) of each under axial load and components within a reasonable.Analyzed under an order of irregular wave surge model of dynamic response curves of water molecules(The velocity potential and acceleration potential to describe)and the oscillating load and swing moment, baseing on improved the Morrison formula for calculation of the load curve for the heaving motion are simulated.