功率分流式风电机增速箱振动特性分析

Vibration Characteristics Analysis of Power Distributional Wind Turbine Gearboxes

运用多体动力学方法对新型功率分流式大功率风电机增速箱进行刚柔耦合多体动力学建模,对双行星齿轮系统的功率分流式大功率增速箱刚柔耦合模态特性、谐响应和稳态响应特性进行研究,结果表明:通过对新型增速箱传动系统建立刚柔耦合多体动力学模型可以对其动力学特性进行准确模拟;通过模态分析获得增速箱工作转速范围内的主要耦合振型及共振频率;通过谐响应分析获得工作转速范围内各级齿轮啮合激励对不同耦合模态振幅的贡献度及主要振动部件的共振形式;对增速机在额定工况下的稳态响应分析可进一步获得主要激励频率和来源及主要部位的振动幅值,仿真结果与测试结果一致。

The rigid-flexible coupling multi-body dynamics model of a new type of high power wind turbine gearbox-es is established based on the multi-body dynamics method.The rigid-flexible coupling modal performance,harmonic re-sponse and steady-state response characteristics of a large-power-dividing double planetary gear system is studied.The re-sults show that the rigid-flexible coupling multi-body dynamic model can accurately simulate the dynamic characteristics of the new type of gearbox transmission system and obtain the main coupling modes and resonance frequencies within the working speed range of the gearbox system.Through harmonic response analysis,the contribution of meshing excitation of gears at all levels to the amplitudes of various coupling modes and the resonance forms of the main vibration components in the working speed range are obtained.By analyzing the steady-state response of the accelerator under rated working condi-tions,the main excitation frequency,source and vibration amplitude of the main parts are obtained.The simulation results are consistent with the test results.