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| Author(s): |
Francisco Ilson da Silva Junior
Total Authors: 1
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| Document type: | Doctoral Thesis |
| Press: | Campinas, SP. |
| Institution: | Universidade Estadual de Campinas (UNICAMP). Faculdade de Engenharia Mecânica |
| Defense date: | 2007-06-22 |
| Examining board members: |
Renato Pavanello;
Sergio Francisco Muller de Almeida;
Emilio Carlos Nelli Silva;
José Roberto de França Arruda;
Euclides de Mesquita Neto
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| Advisor: | Renato Pavanello |
| Abstract | |
This work aims to study the coupled poroelasticity and build a design methodology based on Evolutionary and Topological optimization techniques. Two version of the classical Biot equations are written in terms of solid phase structural displacements (u) and interstitial acoustic pressure (p). The problem is solved using a Kundt tube model coupled to an acoustic wave guide in the low frequency domain. Two methods for the maximization of the acoustic absorption at a specific frequency are proposed. The first method is an evolutionary sequence, based on a sensitivity number and obtained by acoustic elementary absorption determination. The second method is based on a SIMP technique (Simple Isotropic Material With Penalization). It involves a sensitivity analysis and mathematical programming methods. A sensitivity analysis of the coupled system is done by three different methodologies. A Sequential Linear Programming Method (SLP) is used to solve the optimization problem. Bidimensional and Tridimensional examples have been implemented and optimized to validate the proposed methodology investigations are proposed. Finally, the main conclusions are presented and some suggestions about future investigations are proposed. (AU) | |