定轴齿轮箱故障振动特性仿真及实验研究

Simulation and Experimental Study on Fault Vibration Characteristics of Fix-Axis Gear Box

以单级定轴齿轮箱为研究对象,通过多体动力学软件LMS Virtual. Lab建立定轴齿轮箱刚柔耦合模型,研究了定轴齿轮箱平稳型故障和冲击型故障振动响应频率特征。仿真中考虑了故障及故障引起的转速波动对箱体振动加速度的影响,并通过频谱图分析了箱体振动响应信号频率特征。最后实验模拟了平稳型故障和冲击型故障,实测振动响应信号频率特征能够验证仿真分析结果,从而说明了仿真模型的合理性,为定轴齿轮箱故障诊断提供了理论依据。

Based on the CAD Contact Force which can identify gear profile and generate the corresponding fault excitation,a set of rigid-flexible coupling dynamics models of gear box are built in the platform of LMS. Virtual. Lab to research vibration characteristic under steady-type fault and impact-type fault conditions. In the simulation,the influence of the speed fluctuation caused by the fault and the fault on the vibration acceleration of the box is considered,and the vibration acceleration response signal of the box is analyzed by the spectrogram. At last,the simulation analysis results were verified by the vibration characteristic of the response signals of the gearbox system with steady-type fault and impact-type fault in tests. It was shown that the simulation model proposed here is reasonable and the analysis results can provide theoretical basis for fault diagnosis of fixed shaft gearbox.