摘要
采用Kane方法建立风力机系统动力学模型,并使用假设模态离散化方法对其进行柔性化。结合修正的BEM理论计算得到的风轮气动载荷,并在Fortran环境下编程建立风力机整机的系统动力学数学模型,完成对风力机的随机响应分析。以某型2.5MW风力发电机组为研究对象进行分析计算,将分析数据同国际权威计算软件GH Bladed数据比较。比较表明,该分析模型可以较好的模拟风力机的动力学特性,同时兼顾了较少建模计算时间和较高分析精度两个优点,近而验证采用假设模态法进行风力机动力学分析是一种行之有效的方法。
The structural dynamic model of a wind turbine was investigated by using assumed mode method. Veer turbulence model was created for generating time history of three-dimensional wind speed. Along with a wind field model and a modified BEM model, aero-elastic system dynamic model of a wind turbine was constructed with fortran. This model described the dynamics of the wind turbine more correctly than the subsystem model did. A 2.5 MW wind turbine model was calculated and the results were compared with those using GH bladed data. The results showed that the proposed method has excellent capacity to simulate dynamic characteristics of a wind turbine based on the theory of assumed mode method with less computing time and higher accuracy.
出处
《振动与冲击》
EI
CSCD
北大核心
2012年第11期122-126,共5页
Journal of Vibration and Shock
基金
国家自然科学基金(51005255)
教育部高等学校博士学科点科研基金(20090191120005)
