Relationship between crack defects in magnetic tiles and variation frequencies of high-order vibration mode based on modal technology

Lin Fu; Suijun Yang; Xueying Wang; Dexin Hou

doi:10.1117/12.885458

28 December 2010 Relationship between crack defects in magnetic tiles and variation frequencies of high-order vibration mode based on modal technology

Lin Fu, Suijun Yang, Xueying Wang, Dexin Hou

Author Affiliations +

Proceedings Volume 7544, Sixth International Symposium on Precision Engineering Measurements and Instrumentation; 754476 (2010) https://doi.org/10.1117/12.885458
Event: Sixth International Symposium on Precision Engineering Measurements and Instrumentation, 2010, Hangzhou, China

Abstract

Conventional sonic testing method has such limitations as monotony of signal characteristic quantity, regular shape requirement of measured workpiece, limited ability to identify only one type of defect, etc. This paper establishes the mathematical model of modal vector of free vibration object of arbitrary order, analyzes the effects of vibration modes on the various types of crack default with magnetic tiles commonly used in industry as study object, then gives the relationship between the frequencies of high-order vibration mode and the location, length, depth of the same type crack defects and that between the frequencies of high-order vibration mode and 4 kinds of defects common in magnetic tiles including axial short crack through the top of the arc, tangential short crack through the bottom of the arc, tangential crack in the intrados and axial crack in the intrados, and finally 3 types of magnetic tiles were tested to verify its effectiveness. The results are very helpful in automatic detection of internal defects in workpieces.

Citation Download Citation

Lin Fu, Suijun Yang, Xueying Wang, and Dexin Hou "Relationship between crack defects in magnetic tiles and variation frequencies of high-order vibration mode based on modal technology", Proc. SPIE 7544, Sixth International Symposium on Precision Engineering Measurements and Instrumentation, 754476 (28 December 2010); https://doi.org/10.1117/12.885458

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