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Fig. 3. (Color online) FFT spectra of the displacement for the structures without a sensor: (a) structure A (R = 15 mm, h = 1.1 mm), (b) structure B (R = 15 mm, h = 2.2 mm), (c) structure C (R = 50 mm, h = 1.1 mm), and (d) structure D (R = 50 mm, h = 2.2 mm).
New Phys.: Sae Mulli 2022;72:552~557 https://doi.org/10.3938/NPSM.72.552
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