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Modelagem analítica da propagação de ondas de tensão em tubos de parede fina visando a localização de uma fonte pontual harmônica em sua superfície
| Content Provider | Semantic Scholar |
|---|---|
| Author | Boaratti, Mario Francisco Guerra |
| Copyright Year | 2006 |
| Abstract | Leaks in pressurized tubes generate acoustic waves that propagate through the walls of these tubes, which can be captured by accelerometers or by acoustic emission sensors. The knowledge of how these walls can vibrate, or in another way, how these acoustic waves propagate in this material is fundamental in the detection and localization process of the leak source. In this work an analytic model was implemented, through the motion equations of a cylindrical shell, with the objective to understand the behavior of the tube surface excited by a point source. Since the cylindrical surface has a closed pattern in the circumferential direction, waves that are beginning their trajectory will meet with another that has already completed the turn over the cylindrical shell, in the clockwise direction as well as in the counter clockwise direction, generating constructive and destructive interferences. After enough time of propagation, peaks and valleys in the shell surface are formed, which can be visualized through a graphic representation of the analytic solution created. The theoretical results were proven through measures accomplished in an experimental setup composed of a steel tube finished in sand box, simulating the condition of infinite tube. To determine the location of the point source on the surface, the process of inverse solution was adopted, that is to say, known the signals of the sensor disposed in the tube surface, it is determined through the theoretical model where the source that generated these signals can be. |
| File Format | PDF HTM / HTML |
| DOI | 10.11606/T.85.2006.tde-22032012-164517 |
| Alternate Webpage(s) | http://pelicano.ipen.br/PosG30/TextoCompleto/Mario%20Francisco%20Guerra%20Boaratti_D.pdf |
| Alternate Webpage(s) | https://doi.org/10.11606/T.85.2006.tde-22032012-164517 |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
