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首页> 外文期刊>Mechanical systems and signal processing >Simulating gear and bearing interactions in the presence of faults Part I. The combined gear bearing dynamic model and the simulation of localised bearing faults
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Simulating gear and bearing interactions in the presence of faults Part I. The combined gear bearing dynamic model and the simulation of localised bearing faults

机译：在出现故障的情况下模拟齿轮和轴承的相互作用第一部分。组合齿轮轴承动力学模型和局部轴承故障的仿真

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This paper presents a simulation model for a gearbox test rig, in which a range of bearing faults can be implemented. Bearing faults sometimes manifest themselves by their interaction with meshing gears, and to simulate this it is necessary to model a whole system of gears and shafts supported in bearings. This has now been done for an experimental test rig through the incorporation of a time-varying, non-linear stiffness bearing model into a previously developed gear model. The incorporated bearing model is based on Hertzian contact theory, which relates the raceway displacement to the bearing load, and also accounts for the slippage between the elements. It has the capacity to model localised spalls (inner race, outer race and rolling elements), which are discussed in this part of the paper and extended inner and outer race faults (rough surfaces), which are discussed in part II. Even though the whole gearbox has not been modelled in detail, the nonlinear time-varying gear-meshing operation is modelled in some detail. Both simulated and experimental localised fault signals (acceleration signals) were subjected to the same diagnostic techniques; namely spectrum comparisons, Spectral Kurtosis (SK) analysis and envelope analysis. The processed simulated signals showed a similar pattern to that observed in their measured counterparts and were found to have a characteristic, referred to in the literature as double pulses, corresponding to entry into and exit from the localised fault. The simulation model will be useful for producing typical fault signals from gearboxes to test new diagnostic algorithms, and possibly prognostic algorithms.
机译：本文提出了一种变速箱测试台的仿真模型，其中可以实现一系列轴承故障。轴承故障有时会通过它们与啮合齿轮的相互作用而显现出来，并且要对此进行模拟，有必要对轴承中支撑的齿轮和轴的整个系统进行建模。现在已经通过将时变的非线性刚度轴承模型合并到先前开发的齿轮模型中，用于实验测试台。合并的轴承模型基于Hertzian接触理论，该理论将滚道位移与轴承载荷相关联，并考虑了元件之间的滑动。它具有对局部剥落（内圈，外圈和滚动元件）建模的能力，这在本文的本部分中进行了讨论，而扩展的内圈和外圈的断层（粗糙表面）则在第二部分中进行了讨论。即使尚未对整个齿轮箱进行详细建模，但对非线性时变齿轮啮合操作也进行了详细建模。模拟的和实验的局部故障信号（加速信号）都经过相同的诊断技术。即光谱比较，光谱峰度（SK）分析和包络分析。处理后的模拟信号显示出与在其测量的对应信号中观察到的模式相似的模式，并且发现具有一种特征，在文献中称为双脉冲，对应于进入和退出局部断层。该仿真模型对于从变速箱产生典型故障信号以测试新的诊断算法以及可能的预测算法很有用。

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