Modal Analysis: A Comparison between Finite Element Analysis (FEA) and Practical Laser Doppler Vibrometer (LDV) Testing

Pagan, L.; Lake, Kelvin

doi:10.1109/uksim.2017.27

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2019

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“…In such a case, performing a complex modal analysis to obtain an operational deformation shape is usually a relatively long process. This problem is even more difficult for larger structures or for low natural frequency structures, such as aircraft, space structures or civil structures [9][10][11][12][13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Correction of Oblique-Angle Oscillation for Laser Doppler Vibrometry

Kindl¹,

Kavalir²,

Sika³

et al. 2019

Komunikácie

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The paper proposes a correction method of the oblique-angle vibration for laser doppler vibrometry. It briefly discusses the key mathematical approach considering the surface of the analysed object to be a reference plane and gives a practical example of the method proper application. The proposed correction method is practically verified by laboratory measurement of natural frequencies and mode shapes for vibrations of high voltage transformer housing. The results are further compared to equivalent accelerometer measurement.

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