3D FEM Parametric Modeling Applied to Optimization of Ship Hull Girder

Abstract

By describing the whole ship structure in its primary, secondary and tertiary components and by incorporating FEM structural analysis to a ship-like structure optimization, it was observed a significant capability of reducing the weight of ship structure, in an amount impossible to be reached by an usual design process, since, by nonlinear programming in a fast computer, the “best design” can be “selected” among thousands of different and feasible ones.

Modelagem paramétrica de pórticos rolantes: estabilidade estrutural e otimização.

“…Tabela 6.6 -3º caso: "RAND", "SWEEP", "S.A." e "F.O." 3 ] 08,00 08,00 1,00 1,00 4,8800 2,9300 1,3800 1,0000 0,09932 12,67 12,67 1,11 1,11 5,3862 2,5115 1,9029 1,0909 0,10421 17,33 17,33 1,22 1,22 5,1597 2,9985 1,3883 1,0069 0,10353 22,00 22,00 1,33 1,33 5,7371 3,0506 1,3762 1,0140 0,11066 26,67 26,67 1,44 1,44 5,7707 2,9611 1,3881 1,0084 0,11023 31,33 31,33 1,56 1,56 5,2978 2,8701 1,9147 1,1331 0,10824 36,00 36,00 1,67 1,67 5,1471 2,7812 1,9122 1,1395 0,10486 40,67 40,67 1,78 1,78 5,1855 2,8076 1,9123 1,1349 0,10585 45,33 45,33 1,89 1,89 5,1840 2,8321 1,9120 1,1535 0,10577 50,00 50,00 2,00 2,00 5,1431 2,8727 1,9121 1,1309 0,10656 Adotou-se como valores do ponto ótimo: t aba = 5,00, t alma = 3,00, = 1,70 e = 1,10.…”

“…Observa-se pelos resultados apresentados na Tabela 6.9 que as restrições dominantes passaram a ser a flambagem local e o deslocamento das Pernas. 3 ] 08,00 08,00 1,00 1,00 4,9293 2,0621 1,0073 1,0149 0,08316 12,67 12,67 1,11 1,11 5,2972 1,9057 1,2661 1,0052 0,08882 17,33 17,33 1,22 1,22 5,2116 2,1203 1,0116 1,0118 0,08712 22,00 22,00 1,33 1,33 5,2753 2,1147 1,2658 1,0151 0,09097 26,67 26,67 1,44 1,44 5,2723 2,1287 1,2655 1,0149 0,09112 31,33 31,33 1,56 1,56 5,1795 2,2023 1,2620 1,0116 0,09105 36,00 36,00 1,67 1,67 5,3206 2,1445 1,2661 1,0152 0,09191 40,67 40,67 1,78 1,78 5,3440 2,1367 1,2661 1,0153 0,09208 45,33 45,33 1,89 1,89 5,2222 2,2039 1,3678 1,0220 0,09256 50,00 50,00 2,00 2,00 5,2222 2,2039 1,3678 1,0220 0,09256 Adotou-se como valores do ponto ótimo: t aba = 5,00, t alma = 2,00, = 1,25 e = 1,00.…”