摘要
为防止大型风力发电机运转过程中发生共振破坏危险,提出一种基于多柔体系统动力学模型的时/频域综合共振甄别方法。根据GL2010规范建立某机型MW级风力发电机传动链多柔体动力学仿真模型。进行三种复杂度级别建模方案对比,根据频率覆盖范围判定最优建模方案。通过零部件柔性、轴承刚度和齿轮啮合柔性等实现传动链多柔体动力学精确建模,运用该模型绘制和分析其坎贝尔图、能量分布图和快速傅里叶变换(Fast Fourier transform,FFT)图,结合时/频域综合甄别危险共振点。通过理论计算和第三方软件两种途径进行模型验证。研究结果表明,多柔体建模方案能更深入更全面地描述复杂系统的动态特性,避免简化仿真模型造成的频率限制,该机型传动链在固有频率9.86 Hz和206.27 Hz上存在危险共振点,响应零部件为齿轮箱箱体和二级大齿轮轴,值得关注,仿真分析结果与理论计算结果和第三方软件计算结果吻合。
In order to prevent resonance dangerous and damage in the operation process of large wind turbines, a time / frequency domain integrated resonance screening method is presented. A flexible multibody dynamics simulation model of MW grade wind turbine drivetrain according to the ＂Guideline for the Certification of Wind Turbines Edition 2010＂ is established. Three levels of complexity modeling program are comprised and determined optimum modeling program according to the frequency coverage. Accurate flexible multibody dynamics model of drivetrain is achieved by flexible components, bearing stiffness and mesh flexibility, by which Campbell diagram, energy distribution diagram and fast Fourier transform （FFT） diagram are drawn and analyzed for dangerous resonance screening. Theoretical calculations and third-party software are applied for model validation. The results show that the flexible multibody modeling program can describe the dynamics characteristics of complex systems more deeply and comprehensively, avoid frequency limit caused by simplified simulation model, there are dangerous resonance points on natural frequency 9.86 Hz and 206.27 Hz, response components are gearbox housing and stage 2 wheel gear shaft and worthy of attention, the simulation calculation results are inagreement with the theoretical results and third-party software calculation results.
出处
《机械工程学报》
EI
CAS
CSCD
北大核心
2014年第1期61-69,共9页
Journal of Mechanical Engineering
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)资助项目
关键词
风力发电机
传动链
多柔体动力学
仿真建模
共振
wind turbines
drivetraim flexible multibodydynamics
simulation modeling
resonance
