Damage detection using scanning laser vibrometer

Shen EnChen; Suhas Venkatappa; Samer H. Petro; Hota V. S. GangaRao

doi:10.1117/12.307734

1 June 1998 Damage detection using scanning laser vibrometer

Shen EnChen, Suhas Venkatappa, Samer H. Petro, Hota V. S. GangaRao

Proceedings Volume 3411, Third International Conference on Vibration Measurements by Laser Techniques: Advances and Applications; (1998) https://doi.org/10.1117/12.307734
Event: Third International Conference on Vibration Measurements by Laser Techniques: Advances and Applications, 1998, Ancona, Italy

Abstract

A damage detection algorithm based on the principle of curvature changes has been developed at CFC-WVU. However, the algorithm requires accurate mode shapes with adequate spatial density. Existing contact sensors can not provide adequate spatial density without adding excessive mass. Hence, non-contact scanning techniques, such as scanning laser vibrometer (SLV) has adequate sensitivity and accuracy is yet to be proven. The applicability of SLV on large structures is also questionable. To assess the suitability of using SLV for damage detection, a beam specimen has been tested using an existing system. The results confirm that damage detection using vibration measurements from SLV is successful. Due to more spatial density, the SLV data is shown to be more sensitive than the contact sensor test.

Citation Download Citation

Shen EnChen, Suhas Venkatappa, Samer H. Petro, and Hota V. S. GangaRao "Damage detection using scanning laser vibrometer", Proc. SPIE 3411, Third International Conference on Vibration Measurements by Laser Techniques: Advances and Applications, (1 June 1998); https://doi.org/10.1117/12.307734

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