Identification of Multi-Cracks in the Gate Rotor Shaft Based on the Wavelet Finite Element Method
Identification of Multi-Cracks in the Gate Rotor Shaft Based on the Wavelet Finite Element Method
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DOI：
10.3844/ajeassp.2013.309.319
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发表时间：
2013-09
期刊：
影响因子：
--
通讯作者：
Bin Zhao
中科院分区：
文献类型：
--
作者：
Bin Zhao
为了有效地对多裂纹闸转子轴进行故障识别，建立了基于小波有限元法的多裂纹闸转子轴数量识别方法，并对基于盲源分离算法的闸转子轴频率测试进行了分析。首先将Daubechies小波理论与传统有限元理论相结合建立小波有限元，然后得到完整和裂纹小波有限元的振动方程，应用该方程计算裂纹闸转子轴的固有频率变化率。然后基于小波有限元法获得了有裂纹的闸转子轴的固有频率拟合曲线曲面，并确定了裂纹的识别程序，并对存在两种不同裂纹的闸转子轴进行了分析，结果表明小波有限元能够正确预测多裂纹。
In order to have fault identification for the gate rotor shaft with multiple cracks effectively, the quantity identification method of the gate rotor shaft with multiple cracks based on wavelet finite element method is established and the frequency test of the gate rotor shaft based on blind source separation algorithm is analyzed. Firstly the wavelet finite element was established by combining the Daubechies wavelet theory and the traditional finite element theory and then the vibration equations of intact and cracked wavelet finite element were obtained, which were applied to compute the changing rate of the natural frequencies for the cracked gate rotor shaft. Then natural frequencies fitting curve surface of the cracked gate rotor shaft with were acquired based on the wavelet finite element method and the identification procedure of the cracks was confirmed and the gate rotor shaft with two different cracks was analyzed and the results showed that the wavelet finite element could predict the multi-cracks correctly.