基于整机传动链的风电齿轮箱动力学分析

Dynamics Analysis of Wind Turbine Gearbox based on Full Drivetrain

齿轮箱是风力发电机组中的重要组成部分,其在整机环境下的动力学表现是决定齿轮箱寿命甚至整机寿命的关键因素。利用多体动力学仿真软件Simpack建立了刚体-柔体耦合的某MW级风力发电机组整机多体动力学传动链模型,通过将Simpack传动链模型所计算得出的固有频率与Bladed软件计算结果和理论计算结果相比较,验证了该模型的可靠性和准确性。基于该传动链模型进行了在频域上和时域上的多体动力学仿真求解,对整机传动系统进行了模态分析,对其潜在的共振可能进行了评估,分析了轴不对中对齿轮箱动力学性能的影响,最后通过试验验证了上述分析方法和评估手段的正确性。

The gearbox is a pivotal component in wind turbine, the dynamics performance of gearbox is one of the most critical factors determining the lifetime of gearbox and that of the wind turbine. A multi - body dynamics drivetrain model with rigid - flexible body coupled of a level MW wind turbine is built by using the Simpack software. The reliability and accuracy of this model is confirmed through comparing the nature frequen- cy derived from Simpack drivetrain model and the nature frequency calculated by Bladed software and traditional approach. The modal analysis and torsional resonance analysis of gearbox is completed based on the multi - body dynamics simulation both in frequency domain and time domain, furthermore, the potential resonance is evaluated, the influence of shaft misalignment on the dynamics performance of gearbox is analyzed. The afore- mentioned analysis approach and evaluation method is confirmed to be correct by experimental.