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为仿真轮齿裂纹对轮对驱动单元动力学性能的影响,利用多体动力学软件SIMPACK,在不采用Gear-pair力元的前提下,通过移动Marker、函数表达式以及输入函数等建立齿轮副啮合振动模型,并将其应用于机车轮对驱动单元动力学模型进行仿真分析。仿真结果表明,齿轮副啮合振动模型计算结果与Gear-pair计算结果相差在10%以内;齿轮副啮合振动表现出刚度的时变特性;小齿轮分度圆裂纹将引起轮对驱动单元在时域上表现出冲击特性;当裂纹达到一定深度(刚度减小到一定值)时,轮对驱动单元在频域上表现出小齿轮的转速基频,因此,可通过频域分析达到故障诊断的目的。
In order to simulate the influence of tooth crack on the dynamic performance of the wheelset driving unit, a gear pair was established by moving the Marker, the function expression and the input function without using the Gear-pair force element by using the multi-body dynamics software SIMPACK Meshing vibration model and apply it to the locomotive wheel to simulate the dynamic model of drive unit. The simulation results show that the gear meshing vibration model results are within 10% of Gear-pair calculation results. The gear meshing vibration shows time-varying stiffness. The pinion circular crack will cause the wheel-drive unit to move in the time domain On the other hand, when the crack reaches a certain depth (the rigidity decreases to a certain value), the wheelset driving unit shows the fundamental frequency of the pinion speed in the frequency domain. Therefore, the purpose of fault diagnosis can be achieved by frequency domain analysis .