Eventos Anais de eventos
COBEM 2019
25th International Congress of Mechanical Engineering
EXPERIMENTAL ANALYSIS OF THE DYNAMIC RESPONSE OF A BEAM SUBJECTED TO A FLOW A WIND TUNNEL USING IMAGE PROCESSING METHOD
Submission Author:
Jean César Hilário , SP , Brazil
Co-Authors:
Jean César Hilário, Adailton Borges, Rubens Gallo, Reynold Alves dos Santos
Presenter: Reynold Alves dos Santos
doi://10.26678/ABCM.COBEM2019.COB2019-0239
Abstract
The fluid-structure phenomenon has great impact in engineering areas, like civil with the air flow on buildings and aeronautic with flutter effect actuating during airplane flights. Thus, the development of applications in areas where this effect can occur need to study the results that could happen. This study presents experimental analysis of a stainless-steel beam immersed in an air flow. The displacement profile is obtained by image processing techniques applied to the phenomenon’s record made with a low-cost high-speed digital camera. A natural frequency analysis was made from the displacement data to obtain the first natural frequency and using the Euler-Bernoulli beam theory, the global force actuating in the structure produced by the air flow was founded, making possible the determination of structure’s drag coefficient. This result was compared with results from literature, founding 1.95% of relative error, since the method applied to determine the drag coefficient attended to expectations. Future research is going to use numerical methods to compare the results and see the vibration modal shape, including the fluid-structures theory application to determine the key parameters of the phenomenon.
Keywords
fluid-structure interaction (FSI), high-speed image processing, Vibration Analysis, Structural dynamic
