Grid sensitivity capability for large scale structures
暂无分享,去创建一个
The considerations and the resultant approach used to implement design sensitivity capability for grids into a large scale, general purpose finite element system (MSC/NASTRAN) are presented. The design variables are grid perturbations with a rather general linking capability. Moreover, shape and sizing variables may be linked together. The design is general enough to facilitate geometric modeling techniques for generating design variable linking schemes in an easy and straightforward manner. Test cases have been run and validated by comparison with the overall finite difference method. The linking of a design sensitivity capability for shape variables in MSC/NASTRAN with an optimizer would give designers a powerful, automated tool to carry out practical optimization design of real life, complicated structures.
[1] Garret N. Vanderplaats,et al. Numerical Optimization Techniques for Engineering Design: With Applications , 1984 .
[2] Claude Fleury,et al. Sensitivity and optimization of composite structures in MSC/NASTRAN , 1989 .
[3] Raphael T. Haftka,et al. Accuracy Analysis of the Semi-Analytical Method for Shape Sensitivity Calculation∗ , 1990 .