摘要
针对某1.5兆瓦双馈风力发电机组,采用集中质量法建立了其主传动链的平移-扭转耦合动力学模型,通过傅里叶级数模拟各齿副的时变啮合刚度,并综合考虑轴承支撑刚度、轴的扭转刚度等内部激励,以及时变风速引起的叶轮扭矩激励,仿真获得了各级传动齿轮的扭转振动响应特征。结果发现,各齿轮副的啮合频率在扭振响应谱中均清晰可见,数值与施加的刚度激励相吻合,表明仿真结果真实、可信。通过对比各级齿轮的响应幅值和变化趋势,发现风力机的结构振动由低速级向高速级逐渐增大,其中以高速轴齿轮的扭振响应最为突出。
The coupled dynamic model of translation-torsion of main drive system of wind turbine is built by lumped-parameter method for a 1.5 MW wind turbine,then the time-varying meshing stiffness ofeach gear pair is simulated by Fourier series and considering the internal excitations caused by bearing support stiffness,torsional shaft stiffness and the external excitation caused by the time-varying wind speed. Thought dynamic simulation and calculation,the torsional vibration response features of different stages gear pairs of wind turbine are obtained. Results found that the meshing frequency of each gear pair is clearly visible in the response spectrum,and the numerical value is consistant with the applied stiffness excitation,which indicates that the simulation results are true and credible. It is found that the structural vibration of wind turbine increases from low speed to high speed,and the vibration response of the gear on the high speed shaft is the most prominent by comparing the response amplitudes and trends of all kinds of gears.
作者
张建宇
李加军
杜晓钟
胥永刚
ZHANG Jian-yu;LI Jia-jun;DU Xiao-zhong;XU Yong-gang(Key Laboratory of Advanced Manufacturing Technology of Beijing,Beijing University of Technology,Beijing 100124,China;Beijing Engineering Research Center of Precision Measurement Technology and Instruments,Beijing 100124,China;School of Mechanical Engineering Taiyuan University of Science and Technology,Shanxi Taiyuan 030024,China)
出处
《机械设计与制造》
北大核心
2020年第8期25-30,共6页
Machinery Design & Manufacture
基金
国家自然科学基金资助项目(51675009)。
关键词
风力发电机
主传动系统
随机风载
刚度激励
扭转振动响应
Wind Turbine
Main Drive System
Random Wind Load
Stiffness Excitation
Torsion Vibration Response
