A new thin-wall beam modal testing method based on single point laser continuous plane scanning vibration measurement

Jigang Wu; Bin Qin; Xuejun Li; Qiancheng Zhao

doi:10.1117/12.2035704

10 October 2013 A new thin-wall beam modal testing method based on single point laser continuous plane scanning vibration measurement

Jigang Wu, Bin Qin, Xuejun Li, Qiancheng Zhao

Author Affiliations +

Proceedings Volume 8916, Sixth International Symposium on Precision Mechanical Measurements; 89162G (2013) https://doi.org/10.1117/12.2035704
Event: Sixth International Symposium on Precision Mechanical Measurements, 2013, Guiyang, China

Abstract

A high precision and fast testing method for pure modal of vibration body by continuous constant speed plane scanning vibration measurement using single point laser doppler vibrometer is proposed. Thin-walled beam as test object, single point laser continuous plane scanning vibration measurement modal testing scheme is proposed. The processing method for the actual vibration signal is investigated, and the calculating method for the upper and lower alternate envelope of vibration displacement signal is proposed. Thin-walled beam as test object, The modal test platform based on single point laser continuous constant speed plane scanning vibration measurement is put up, and the validity of the modal testing method is verified by the modal testing of thin sheet beam.

Citation Download Citation

Jigang Wu, Bin Qin, Xuejun Li, and Qiancheng Zhao "A new thin-wall beam modal testing method based on single point laser continuous plane scanning vibration measurement", Proc. SPIE 8916, Sixth International Symposium on Precision Mechanical Measurements, 89162G (10 October 2013); https://doi.org/10.1117/12.2035704

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