| In the backdrop of the new energy, wind power generation as one of the most development prospect renewable energy applications, the people attach great importance to.Today’s wind turbine towards the large-scale development, the key member of the design requirements is also rising. Wind turbines working environment is complicated, easily disturbed by storm and low temperature conditions,in order to make its normal operation,design the reasonable structure of wind turbines is of great significance.By drawing on previous research results, the structure of statics strength theory,dynamics, Stability theory,as the foundation, "wind turbine specifications" for the design basis,combined with finite element software for the overall structure of 1.5MW wind turbines were static and dynamic analysis. This paper mainly do the following work:(1)Strength analysis of wind turbine structure, the maximum stress and maximum displacement of the structure under the rated, cut out, limit and low temperature conditions are obtained,and the stress strength is checked.(2) According to the doorway in which different orientations of the stress distribution of wind turbine structures, to determine the best position of the door opening. And through the eigenvalue buckling analysis, the safety factor of the tower is obtained, and its stability is verified.(3) Consider the blades of different orientations, the overall structure of the wind turbine modal analysis is carried out that leaves the effect of different range of natural frequency and the low order natural frequency and calculation of wind machine whether with the frequency of rotation of the wind wheel and the third harmonic was similar, which occurred in the lowfrequency coupling resonance phenomenon.(4) According to the wind turbine site and seismic grade, fitting the response spectrum curve, then by means of response spectrum method for seismic analysis of wind turbine,finally check analysis whether the results meet seismic design requirements for wind turbine. |
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