Abstract:It is essential to find the location of the fault in large bearings to improve the efficiency of the maintenance. A method for fault localization using single acoustic emission sensor is proposed. The dispersion characteristics of Lamb wave are applied to estimate the propagation velocities of possible modes for the bearing annular structures. The arrival time differences of possible modes with the corresponding frequency bands are calculated by using the Akaike Information Criterion (AIC). The distance between the sensor and the acoustic emission source can be estimated according to the velocity difference and the time difference. For the uncertainty of the propagation modes and the twin locations, a secondary localization procedure is carried out by changing the sensor position. The unique location of the acoustic emission source is obtained after filtering out the unreasonable propagation modes. The effectiveness of the proposed method is verified by the pencil lead breaking experiments on the cylindrical roller thrust bearing.
缪祥垚,伍星,柳小勤,汤林江. 基于声发射Lamb波频散特性的轴承损伤单传感器定位[J]. 振动与冲击, 2023, 42(6): 196-201.
MIAO Xiangyao,WU Xing,LIU Xiaoqin,TANG Linjiang. Single-sensor location of a bearing defect based on the Lamb wave dispersion characteristics of acoustic emission. JOURNAL OF VIBRATION AND SHOCK, 2023, 42(6): 196-201.
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