Pile base linearity and foundation structure super-unit calculation method suitable for offshore wind turbine integral coupling calculation

Abstract

The invention discloses a pile base linearity and foundation structure super-unit calculation method suitable for offshore wind turbine integral coupling calculation, and belongs to the technical field of offshore wind turbine numerical simulation calculation. According to the calculation method, an offshore wind turbine integral coupling analysis method is established, and a coupling model for interaction of offshore wind turbine aerodynamic force- hydrodynamic force-control,-structural elasticity-pile soil is built, which are used for carrying out integral coupling analysis on a single-pile, jacket and multi-pile foundation offshore wind turbine structure; the invention can also be used for carrying out dynamic response analysis on the overall structure of a gravity type offshore wind turbine, a high pile cap type offshore wind turbine and other foundation type offshore wind turbines under the combined action of wind loads and wave loads. The whole set of module is used independently and can also be connected with other software. The invention includes a plurality of super-unit condensation methods, and different condensation methods can be selected according to calculation precision and efficiency requirements. According to the invention, the coupling reaction analysis of the fixed offshore wind turbine of the complex foundation structure can be realized, and the method can be combined with finite element software to carry out the bearing capacity check and safety evaluation of the foundation structure under different working conditions.

Description

technical field [0001] The invention relates to the technical field of numerical simulation calculation of offshore wind turbines, in particular to a pile foundation linearization and foundation structure super-element calculation method suitable for the overall coupling calculation of offshore wind turbines. Background technique [0002] The world is rich in offshore wind energy resources. my country is one of the countries with the most abundant offshore wind energy resources. In the eastern coastal areas, the development potential of offshore wind power at a water depth of 5-25 meters and a height of 50 meters exceeds 200 million kilowatts; The development potential of offshore wind power at a height of one meter reaches 500,000 MW. [0003] In recent years, my country's offshore wind power industry has developed rapidly. Various fixed foundation forms such as gravity type, high pile cap, single pile, jacket and multi-pile foundation have been adopted in the development an...

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Problems solved by technology

[0004] At present, the existing numerical simulation calculation models for the overall structure of offshore wind turbines under the combined action of wind and waves mainly use fixed boundary conditions for the boundary conditions of fixed foundation structures. The main disadvantage of this method is that the pile-soil interaction cannot be considered For the influence of the structural response of offshore wind turbines under the action of wind and waves, the accurate dynamic response of offshore wind turbine structures cannot be obtained

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