In this paper, we achieve the influence of crack on the radiation characteristic of the sound field of gear structure by analyzing the reference circle crack and root crack for gear. Above all, the mode of three-dimensional elastic body of root crack and reference circle crack are established , dynamic analysis and model analysis of the two kind modes are achieved by ANSYS, also, various analysis parameters be acquired. Based on this, with the help of MATLAB and the theory of thick circle plate, we get the acoustic character of reference circle crack and root crack of gear, and, achieve the distribution of sound pressure on the r = 0.5m sphere surface and axial sound pressure of cracked gear structure. Based on the analysis and comparison of the results, it is show that the influence of the location and depth of crack on acoustic characteristic of gear structure, and the rule of influence of crack is obtained . These provide a theoretic foundation for gear fault diagnosis using the acoustic method in engineering .
SHAO Ren-ping;XU Zhi-feng;XUE Teng.
The influence of crack on the vibration and acoustic radiation characteristic of three-dimension elastic body for gear structure[J]. Journal of Vibration and Shock, 2010, 29(9): 175-180
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