论文信息 - Shape optimization of three-dimensional shell structures with the shape parametrization of a CAD system

Shape optimization of three-dimensional shell structures with the shape parametrization of a CAD system

This paper presents a method for shape optimization of flat or curved 3D shell structures, that takes advantage of the geometric modelling and automatic meshing capabilities of an existing parametric/associative CAD system. It is an extension of a method previously proposed by the authors for shape optimization of 2D and 3D solid structures. The implementation of the shell elements used is outlined, as well as the calculation of analytical sensitivities with the discrete method. The validity of the method is demonstrated with the optimization of two complex 3D shell structures.

J. L. T. Santos | T. Lindby

[1] Kyung K. Choi,et al. Configuration design sensitivity analysis of built-up structures part II: Numerical method , 1993 .

[2] C. M. Mota Soares,et al. Shape optimization of axisymmetric shells using a higher-order shear deformation theory , 1995 .

[3] M. Bernadou,et al. Finite Element Methods for Thin Shell Problems , 1996 .

[4] M. E. Botkin,et al. Shape optimization of three-dimensional folded-plate structures , 1985 .

[5] Denise Chenais. Discrete Gradient and Discretized Continuum Gradient Methods for Shape Optimization of Shells , 1994 .

[6] Kyung K. Choi,et al. Configuration design sensitivity analysis of built-up structures , 1992 .

[7] J. Santos,et al. 2-D and 3-D shape optimization using mesh velocities to integrate analytical sensitivities with associative CAD , 1997 .

[8] Michael L. Accorsi,et al. Automatic shape optimization of three-dimensional shell structures with large shape changes , 1993 .

[9] O. C. Zienkiewicz,et al. Analysis of thick and thin shell structures by curved finite elements , 1970 .

[10] R. J. Yang,et al. Shape Sensitivity Analysis and Optimization Using NASTRAN , 1991 .

[11] T. Lindby,et al. SHAPE DESIGN SENSITIVITY ANALYSIS AND OPTIMISATION WITH AN EXISTING ASSOCIATIVE CAD SYSTEM , 1994 .