Dynamic Reliability Analysis of Wind Turbine Systems Subject to Wind Loads

Abstract:

The paper first presents a new dynamic reliability evaluation method based on generalized probability density evolution method (GPDEM).Then,the dynamic reliability of 1.25 MW steel wind turbine system and reinforced concrete wind turbine system is evaluated separately in combination with the physical model of stochastic wind field and the integrated finite element model consisting of the rotor,the nacelle,the tower and the foundation.The results show that the dynamic reliability of wind turbine systems can be worked out by the proposed method.Besides,the concrete wind turbine system is of a higher reliability than the steel one.

Key words:steel wind turbine system; reinforced concrete wind turbine system; dynamic reliability; generalized probability density evolution method; random Fourier spectrum; rotational Fourier spectrum