【摘要】 针对双轴惯性直线振动机械滚动轴承单一局部损伤故障判别问题。通过分析滚动轴承运行状态和载荷分布，建立基于Hertz接触理论的内、外环局部损伤故障的冲击振动模型并进行仿真和试验验证。研究结果表明，双轴惯性直线振动机械滚动轴承载荷分布区在振动方向近180°范围内随轴的旋转而周期性变化，使内、外环局部损伤故障的冲击响应时域幅值存在显著的调制现象，其包络谱图中故障特征频率的边频和调制频率显著；外环故障与单轴惯性振动机械、内环故障与旋转机械的包络谱有很大的相似性，但轴承的受力和设备工作原理的不同导致时域波形和故障机理却有本质区别，为有效诊断振动机械滚动轴承故障提供了理论依据。更多还原

【Abstract】 Aimed at the fault identification problem of rolling bearings with single local damage fault in dual-shaft inertial linear vibrating machines, an impact vibration model about local damage fault of the inner ring and the outer ring on the basis of the Hertz contact theory was established by analyzing the running state and load distribution of rolling bearings, while the simulation search and corresponding experiment verification were conducted. The results show that the load distribution area of the rolling bearing in dual-shaft inertial linear vibrating machines changes periodically with the rotation of the shaft within the range of nearly 180 ° along the vibration direction, so that the time domain amplitude of the impact response to the local damage fault of the inner and outer rings has a significant modulation phenomenon, and the side frequency and modulation frequency of the fault characteristic frequency in the envelope spectrum are significant. The envelope spectrum of the outer ring fault is very similar to that of the single-axis inertial vibration machinery, and the envelope spectrum of the inner ring fault is similar to that of the rotating machinery, but the difference of the bearing force and the working principle of the equipment results in the essential difference of the time domain waveform and the fault mechanism. It provides a theoretical basis for effective diagnosis of rolling bearing faults in vibration machinery.更多还原