风力发电机组传动链动力学建模与仿真分析研究

发布时间：2018-08-16 14:00

【摘要】：风力发电机组传动链是一个复杂的多体耦合系统。其动力学特性对整个风电机组的稳定性和可靠性有重要影响，论文依据德国劳埃德船级社风机认证2010标准，采用多体动力学建模方法，以SIMPACK软件为仿真平台，结合有限元方法建立了风力发电机组传动链多柔体动力学仿真模型，通过仿真分析得到传动链各零部件和整个传动系统的动力学特性参数，并最终确定传动链的危险共振点。论文的主要研究内容如下： ①分析了世界各国对风资源的利用情况和风力发电技术的发展趋势，以及国内外学者对风力发电机组传动系统动力学建模与仿真分析的研究成果。 ②依据风力发电机组多体建模理论，对多体系统运动学、动力学公式进行了推导，并对有限元法进行了论述。 ③针对某机型传动链结构形式、载荷传递路线，绘制出传动链拓扑图，依据拓扑关系结合有限元法，建立整个传动链的多柔体仿真模型。 ④以SIMPACK多体动力学仿真软件为平台，进行模态分析，得出传动链的固有频率值和各阶频率下的能量分布图，绘制出二维坎贝尔图，得出潜在共振点信息。 ⑤通过时域扭矩扫频分析，得到响应零部件的加速度曲线，通过FFT转换到频域，通过对变换曲线峰值进行判定，，最终确定共振点。
[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.
【学位授予单位】：重庆大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM315

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