1. Naval & Ocean Eng. Dept., University of São Paulo, São Paulo, SP, Brazil
2. Laboratory of Advanced Electric Grids, University of São Paulo, São Paulo, SP, Brazil
3. Structural and Geotechnical Eng. Dept., University of São Paulo, São Paulo, SP, Brazil
4. Mechanical Eng. Dept., University of São Paulo, São Paulo, SP, Brazil
5. CENPES/Petrobras, Rio de Janeiro, RJ, Brazil