风机传动结构分析16页3665_3680.pdfVIP

Structural analysis of a wind turbine and its drive train using the flexible multibody simulation technique 1 2 2 J. Peeters , D. Vandepitte , P. Sas 1 Hansen Transmissions International, Leonardo da Vincilaan 1, B-2650 Edegem, Belgium e-mail: jpeeters@ 2 K.U.Leuven, Department of Mechanical Engineering, Celestijnenlaan 300 B, B-3001, Heverlee, Belgium Abstract This article demonstrates the application of a generic methodology, based on the flexible multibody simulation technique, for the dynamic analysis of a wind turbine and its drive train, including a gearbox. The analysis of the complete wind turbine is limited up to 10 Hz, whereas the study of the drive train includes frequencies up to 1500 Hz. Both studies include a normal modes analysis. The analysis of the drive train includes additionally a response calculation for an excitation from the meshing gears, a Campbell analysis for the identification of possible resonance behaviour and a simulation of a transient load case, which occurs as a sudden torque variation caused by a disturbance in the electrical grid. 1 Introduction During the last decades, the interest for using renewable energy sources for electricity generation increased [1]. One of its results is a boom in the wind turbine industry since ten years. Figure 1 shows how the global in- stalled wind power capacity reached 59.3 GW at the end of 2005, of which about 20% had been installed in that year. This rapid growth is expected to continue in the coming years and to drive new technological improvements to further increase the capacity and reduce the cost of wind turbines. In their design calculations, the wind turbine manufacturers use dedicated software codes to simulate the load levels and variations on all components in their machines. Peeters [3] gives an overview of the existing traditional simulation codes. He concludes that the concept of the structural model of