Non-contact measuring technique for the vibration test of the bent structure

Liguo Sun; Chengbin Du; Yuquan Chen

doi:10.1117/12.839267

25 August 2009 Non-contact measuring technique for the vibration test of the bent structure

Liguo Sun, Chengbin Du, Yuquan Chen

Proceedings Volume 7375, ICEM 2008: International Conference on Experimental Mechanics 2008; 73753S (2009) https://doi.org/10.1117/12.839267
Event: International Conference on Experimental Mechanics 2008 and Seventh Asian Conference on Experimental Mechanics, 2008, Nanjing, China

Abstract

The method of non-contact measurement is applied to test the vibration of bent top. Firstly, vibration velocities at the bent top along light paths were measured with the PDV-100 at two different positions. And secondly, vibration velocities at the bent top along direction and vertical direction of the rail were calculated. Velocity spectrum is changed into displacement spectrum by the method of frequency-spectrum- transformation. Curve of the vibration displacement time history is obtained finally. This method is very useful for the case when testing instrument can not be arranged on the direction of vibration due to the restriction of site condition.

Citation Download Citation

Liguo Sun, Chengbin Du, and Yuquan Chen "Non-contact measuring technique for the vibration test of the bent structure", Proc. SPIE 7375, ICEM 2008: International Conference on Experimental Mechanics 2008, 73753S (25 August 2009); https://doi.org/10.1117/12.839267

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