| Autor: |
Thomas G. Eason, Jorge Abanto-Bueno, Adam K. Parks |
| Rok vydání: |
2012 |
| Předmět: |
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| Zdroj: |
Application of Imaging Techniques to Mechanics of Materials and Structures, Volume 4 ISBN: 9781441995285 |
| Popis: |
In this investigation the vibration response of a clamped-clamped steel curved beam is studied experimentally using the non-contact, full-field 3D digital image correlation (DIC) technique. The effect on the boundary conditions of the clamping torque as well as the procedure used to fasten the beam to the testing apparatus was clearly established from measurements of the three-dimensional displacement field. Swept sine tests were performed at 1 g of base excitation and over a frequency range of 20 – 500 Hz. Resonance was qualitatively identified at frequency ranges 75 – 85 Hz, 120 – 138 Hz and 240 – 265 Hz. Swept sine tests were carried out at a rate of 0.2 Hz/s over these three frequency ranges to measure the distribution of the out-of-plane displacement of the beam mid-plane over its entire length. 1024x1024-pixel images were taken at a rate of 2000 fps at frequency 76, 126 and 253 Hz and analyzed using 3D DIC. The results show three different bending modes at these frequencies. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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