Offshore wind turbine supporting structure optimization design method and system based on proxy model

Abstract

The invention discloses an offshore wind turbine supporting structure optimization design method and system based on a proxy model, and the method comprises the steps of building a relation between the design parameters of support structures of offshore wind turbine generators with different capacities and the performance response of an optimized design structure based on a Kriging proxy model; meanwhile, subjecting the tower and the single-pile foundation to optimization design so as to find the optimization design with the lightest mass of the whole supporting structure. By the adoption of the method, the problem that only the lightest design of a tower or a single pile is found due to the fact that the offshore wind turbine supporting structure is caught in a local optimal solution during optimization design can be avoided; by the adoption of the method and process, the tower and the foundation structure are checked and optimally designed after load calculation, the global optimal design can be found, the structural integrity is higher, rigidity distribution is more uniform, stress is more reasonable, and finally the purposes that the weight of the whole supporting structure is the lightest is achieved. Optimization design is carried out based on the proxy model, the number of needed computer simulation structure analysis times is reduced, and optimization efficiency is improved.

Description

technical field [0001] The invention belongs to the technical field of support structure design for offshore wind power generating sets, and in particular relates to an optimization design method and system for support structures of offshore wind turbines based on an agent model. Background technique [0002] Benefiting from the technological progress and scale expansion of wind power, the price of wind turbines, the investment cost of wind power development and the cost of operation and maintenance are showing a downward trend. From the perspective of wind turbine prices, the support structure of offshore wind turbines includes two parts: towers and foundations: the cost of wind turbine towers accounts for about 8% of the investment cost of offshore wind power projects, and the foundation of offshore wind turbines mainly includes single piles, jackets, high pile caps, etc. Different foundation forms generally account for about 14% of the investment cost of offshore wind pow...

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Problems solved by technology

[0015] If we want to use the sensitivity-based optimization algorithm to solve the optimal design of the offshore wind turbine support structure, we can only obtain the sensitivity of the structural performance to the design variables through the finite difference method, the workload is very large, and it cannot meet the requirements of the actual construction period

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