S24  Mecânica dos Sólidos    Titulo: ASPECTS OF THREE-DIMENSIONAL STRUCTURAL SHAPE OPTIMIZATION   Resumo : IN THIS WORK, SHAPE OPTIMIZATION OF THREE-DIMENSIONAL STRUCTURES DESCRIBED BY NURBS SURFACES IS PRESENTED. THE FINITE ELEMENT METHOD IS APPLIED TO STRUCTURAL ANALYSIS. CONTINUOUS DESIGN SENSITIVITY ANALYSIS IS USED TO EVALUATE GRADIENTS OF PERFORMANCE FUNCTIONALS. THE EXPRESSIONS OF SHAPE SENSITIVITY DEPEND ON THE DESIGN VELOCITY VECTOR FIELD WHICH DESCRIBES SHAPE VARIATIONS OF THE DOMAIN. ASPECTS OF BOUNDARY VELOCITY FIELD EVALUATION AND GEOMETRIC DATA STRUCTURES ARE DISCUSSED. FINALLY, A SHAPE OPTIMIZATION OF A 3D LINEAR ELASTIC EXAMPLE IS PRESENTED. KEYWORDS: OPTIMIZATION, SENSITIVITY ANALYSIS, FINITE ELEMENT METHOD, NURBS, VELOCITY FIELDS.     Autores : Bittencourt, Marco Lúcio Silva, Cláudio A. de C.     Trabalho Completo :   COBEM99 | Comissão  Organizadora | Palestras | Sessões Técnicas | Autor | Simpósios e Sessões Especiais | Revisores |  Título  dos  Trabalhos | Local