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首页> 外文会议>International Symposium on Stability Control of Rotating Machinery(ISCORMA-4); 20070827-31; Calgary(CA) >A NEW VIBROACOUSTIC METHOD FOR SHAFT CRACK DETECTION
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A NEW VIBROACOUSTIC METHOD FOR SHAFT CRACK DETECTION

机译：振动裂纹检测的一种新的声学方法

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摘要

Various excitation techniques have been developed to extract information on dynamic state of rotating machinery. This paper will address the effectiveness of selected excitations and analysed signals towards health monitoring of rotating machines from the shaft crack point of view. The computer simulation study is based on the uncracked and cracked Jeffcott rotor models and the efficiency of the selected approaches is examined. As the excitation we have considered the rotor unbalance, additional harmonic forces, and input conditions. The combined resonances as diagnostic indicators of the cracked shaft are good seen in the total frequency spectrum in the case when we consider the difference between the spectra of cracked and uncracked shaft. We have also introduced a new model of the rotor which allows us to use different method of signal processing for the crack detection and the evaluation of its deep. So more, in such model we can take into account the number of excitation planes and directions of the applied forces, the choice of the analysed signals (e.g. transient, steady-state).
机译：已经开发了各种激励技术来提取有关旋转机械的动态状态的信息。本文将从轴裂纹的角度探讨所选激励的有效性，并分析信号对旋转机械的健康状况进行监控。计算机仿真研究基于未破裂和破裂的Jeffcott转子模型，并检验了所选方法的效率。作为励磁，我们考虑了转子不平衡，附加谐波力和输入条件。当我们考虑裂纹轴和未裂纹轴的频谱之间的差异时，在总频谱中可以很好地看到作为谐振轴诊断指标的组合共振。我们还介绍了一种新型的转子模型，该模型允许我们使用不同的信号处理方法进行裂纹检测和深度评估。因此，在这种模型中，我们可以考虑激励平面的数量和作用力的方向，分析信号的选择（例如瞬态，稳态）。

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