風(fēng)力發(fā)電機(jī)組傳動鏈動力學(xué)建模與仿真分析研究
[Abstract]:The transmission chain of wind turbine is a complex multi-body coupling system. Its dynamic characteristics have an important influence on the stability and reliability of the whole wind turbine unit. According to the German Lloyd's Classification Society Fan Certification 2010 standard, the multi-body dynamic modeling method is adopted, and the simulation platform is SIMPACK software. Combined with finite element method, the dynamic simulation model of wind-turbine transmission chain is established. The dynamic characteristic parameters of each part of the transmission chain and the whole transmission system are obtained by simulation analysis, and the dangerous common vibration point of the transmission chain is finally determined. The main contents of this paper are as follows: 1 the utilization of wind resources and the development trend of wind power generation technology in the world are analyzed. According to the theory of multi-body modeling of wind turbine, the kinematics and dynamics formulas of multi-body system are deduced. The finite element method is discussed. 3 according to the structural form of transmission chain and load transfer route, the topology diagram of transmission chain is drawn, and the topological relation is combined with finite element method. The multi-flexible body simulation model of the whole transmission chain is established. (4) based on the SIMPACK multi-body dynamics simulation software, the modal analysis is carried out, and the natural frequency value of the transmission chain and the energy distribution diagram under each order frequency are obtained, and the two-dimensional Campbell diagram is drawn. 5 through time domain torque sweep analysis, the acceleration curve of response parts is obtained. The acceleration curve is converted to frequency domain by FFT. Finally, the common vibration point is determined by determining the peak value of transformation curve.
【學(xué)位授予單位】:重慶大學(xué)
【學(xué)位級別】:碩士
【學(xué)位授予年份】:2014
【分類號】:TM315
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