Optimal Design Of Force-transferring System For Large-scale Bucket Foundation Of Offshore Wind Turbines

In recent years, as a new type of renewable energy, wind power has already more and more got the attention of the countries all over the world. Building offshore wind farms, developing and using wind power around the sea has become the trend for the development of international wind power. It is a very important process to the selection and design of the foundation part for the whole construction of the wind turbine. Compared to the current traditional bucket foundation, large-scale bucket foundation with cover-load-bearing mode has been paid more and more attention because of its special load-bearing mode and its better bearing capacity. The optimization for existing bucket foundation structure can make every components working more effectively and also can reduce the construction cost for the structure engineering, which will provide guarantee for practical project and lead good effect for practical engineering.After proving that arc-type foundation demonstrates better load-bearing properties than straight line-type, as a background for offshore wind power projects in Qidong sea area, in this paper, the general-purpose finite element analysis package ABAQUS is used to conduct trial calculating model on the basis of the original bucket foundation structure and optimize a variety of components and arrangements, using general optimizing theory and method of the engineering structure. First of all, according to finite element simulation results of initial structure, the main load bearing and optimizing parts—arc transition part of structure, cylinder top cover component area and beam member area—are established and ascertained. In the optimizing process, according to the calculated results, the critical roles in the bearing system and force-transferring system of whole model for the pre-stressed tendons or bars within the different structure parts are analyzed. Then, several possible optimizing methods are recommended or introduced on the basis of the tensile or compressive action for different members or parts. Meanwhile, trail calculating models are set up for every possible optimization scheme. Finally, according to finite element calculation results of trial model, considering the various influences of several change forms and adjustments to the overall bearing system and force-transferring system, the reasonable optimizing adjustment measures are established and put forward ultimately in order to save the materials consumption and cost.