Dynamic response and time-frequency analysis for gear tooth crack detection
Dynamic response and time-frequency analysis for gear tooth crack detection
复制标题
齿轮裂纹检测的动态响应及时频分析
DOI：
10.1016/j.ymssp.2015.05.015
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发表时间：
2016-01-01
影响因子：
8.4
通讯作者：
Rantatalo, Matti
中科院分区：
文献类型：
--
作者：
Mohammed, Omar D.;Rantatalo, Matti
振动健康监测是一种无损检测技术，可用于检测齿轮齿中裂纹的扩展。本文研究了齿轮裂纹检测的固有频率和进行时频分析的6自由度动态齿轮模型。对不同裂纹尺寸的齿轮啮合刚度进行了分析计算。推导了系统正常和故障时的频率响应函数，并进行了动态仿真，得到了系统的时间响应。一种新的方法，涉及短时傅立叶变换（STFT）的应用，其中快速傅立叶变换（FFT）计算的连续块具有不同的大小对应于不同的齿轮啮合刚度的时间段。研究了不同裂纹尺寸与啮合刚度相关的特征频率之间的关系，以检测齿裂纹并估计其尺寸。(C)2015爱思唯尔有限公司版权所有。
Vibration health monitoring is a non-destructive technique which can be applied to detect cracks propagating in gear teeth. This paper studies gear tooth crack detection by investigating the natural frequencies and by performing time-frequency analysis of a 6 DOF dynamic gear model. The gear mesh stiffness used in the model was calculated analytically for different cases of crack sizes. The frequency response functions (FRFs) of the model were derived for healthy and faulty cases and dynamic simulation was performed to obtain the time signal responses. A new approach involving a short-time Fourier transform (STFT) was applied where a fast Fourier transform (FFT) was calculated for successive blocks with different sizes corresponding to the time segments of the varying gear mesh stiffness. The relationship between the different crack sizes and the mesh-stiffness-dependent eigenfrequencies was studied in order to detect the tooth crack and to estimate its size. (C) 2015 Elsevier Ltd. All rights reserved.