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Experimental Modal Analysis

Experimental Modal Analysis

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Figure 4. Practicality plate and bench vice
Figure 5. Vibration displacement (Left), magnify before excited and...
Figure 8. FFT spectrums of the four nodes displacement
Figure 9. Experimental Modal Analysis
Natural frequencies and damping ratios comparison
Vibration modes measurement of defective plate using high-speed digital image correlation
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  • Jul 2018
Digital image correlation (DIC) has been developed for decades as a non-contact optical technique of full-field displacement and strain measurement using precise and costly digital cameras with high image resolution and used in many applications, including material characterization, temperature deformation, fracture analysis, vibration analysis and...
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... Experimental Modal Analysis (EMA) has to be applied to find the dynamic characteristic, including its modal frequency modal damping and modal shape. As is shown in Figure 9, inputs are the forty nodes' displacement signal in time domain and outputs are visually modal shapes. Firstly, Node 1 and Node 33 are taken as the reference points for PSD + matrix (Power Spectral Density with only a positive time lag) calculation. ...

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