大型风力机系统运行模态分析研究  

Operational modal analysis of a large wind turbine

作　　者：钟灿堂 李德源[1] 汪显能 莫文威 刘雄[2] 

机构地区：[1]广东工业大学机电工程学院,广州510006 [2]汕头大学能源研究所,广东汕头515063

出　　处：《振动与冲击》2016年第6期121-126,145,共7页Journal of Vibration and Shock

基　　金：国家自然科学基金(51276043);教育部高等学校博士点科研基金项目(20124402110005);教育部科学技术研究重点项目(212130)资助

摘　　要：针对大型风力机在风轮静止、变速转动下振动模态及变化特点,研究弹性变形、惯性及陀螺效应引起的系统各阶模态变化及对系统气弹稳定性影响。通过研究现有线性特征值分析方法,考虑大型风力机非线性特性及风轮转动所致系统时变特性,基于多体系统动力学理论及混合多体系统HMBS(Hybrid Multi-body Systems)建模方法,结合动力学分析软件ADAMS,分析静止状态整机系统线性特征值问题;考虑构件弹性变形及风轮旋转,用刚性积分方法对系统非线性控制方程进行数值求解,通过傅里叶谱分析方法实现风轮旋转下系统运转模态识别,并讨论、分析系统前十阶模态变化及影响因素。研究结果可作为风力机系统气弹稳定性判据,为避免共振、提高系统运行效率等提供有效的解决手段及分析方法。Aiming at the vibration modes and its variation characteristics of a large wind turbine under static status and various rotational speeds, the variations of each mode caused by elastic deformation, inertia and gyroscopic effect and their effects on aeroelastic stability of the wind turbine system were studied. Considering the large wind turbine system＇s non-linear characteristics and time-varying characteristics caused by the rotational wind rotor, the linear eigenvalue problems of the wind turbine were analyzed by using the dynamics software ADAMS, based on the dynamics theory of multi-body system and the modeling methodology of hybrid multi-body system （HMBS）. A stiff integral method was then employed to solve the non-linear control equations of the system numerically considering the elastic deformation of flexible components and the rotation of the wind rotor. The operational modal identification was performed through Fourier spectral analysis. The variations of the system＇s first ten modes and their influence factors were discussed and analyzed in detail. The results can be used as aeroelastic stability criteria, which offer an effective solution and analysis method to avoid resonance and improve operating efficiency of the wind turbine system.

关 键 词：风力机 超级单元 模态分析 气弹稳定性 

分 类 号：TK83[动力工程及工程热物理—流体机械及工程]