High Power Wind Turbine Hub's Structural Strength Analysis And Optimization Design

Energy and environment have become critical issues for the survival and development of human beings nowadays. Since bearing the advantages of non-pollution, time-saving, flexible-investment, room-saving, wind power has good economical and social benefits. With the wind turbine becoming larger and larger, and the load it endured is also very complicated, the problem of safety in the wind turbine of its components becomes more and more important. In order to maintain over its anticipated service life, must first launch the design research to wind turbine's essential spare part.Hub is an important component of Wind turbine for its complex shape. The design of hub has direct impact the operation of wind turbine in its anticipated service life. Therefore, it is necessary to calculate static and fatigue analysis under various ultimate loads, which can display the distribution of stress, and find out the most dangerous locations.Based on the theory of finite element method, the main contents are following:â‘ According to the modeling principle of finite element method, two finite element models have been established based on its geometric model through simplification processes. One model consists of tetrahedron elements, which has been set simply, and divided mesh grid by automeshing. The other is hexahedron element model. The three-dimensional grid is complicated, especially hexahedron, which has been generated by manual dividing. On the basis of this, two types of model have been carried out meticulous analysis and comparison.â‘¡The ultimate strength, fatigue and contact analysis have been researched on finite element model of the hub. The result is consistent by contrast the obtained data and the test data, which has verified correctness of this method by the main body of paper. This hub has sufficient intensity and life time.â‘¢With this paper, one hub of the study, using similar principles and topology optimization methods, provided the OptiStruct module with the aid of finite element software Altair to develop the new hub's structural model, this hub model was suitable the general WM level large-scale wind turbine. This article and has carried on the static stress examination to the development hub, satisfies the anticipated development goal. Therefore, the paper to provides the science reliable basis for the large-scale wind turbine hub's analysis and the independent design, reduced the development time greatly, saved the development cost. Solves the hub security and the life problem to the enterprise has the important theory significance and the engineering practical value, was the development has the independent intellectual property rights. Manufacture domestically wind turbine to lay the solid foundation.