Application of Structural Optimization Technologies and Methods to Reduce Design Time and Improve Structural Robustness

摘要

Optimization technologies and methods can be used to effectively reduce component design-time and weight, to improve component strength, to "tune" structures to accommodate modal targets, and to generally improve component robustness. In this paper Topology Optimization, Topography Optimization and Size and Shape Optimization, as they apply to aerospace-related applications, are discussed. Topology Optimization is considered in the determination of material placement in order to minimize component stress and mass. Topography Optimization for the stiffening of plate type structures is discussed. In order to achieve required structural frequencies, Topography Optimization produces bead patterns to drive component stiffness to acceptable levels. Size and Shape Optimization for Design Fine Tuning and for optimally meeting design requirements such as stress, strain, buckling, frequency, displacement, etc., is considered. Size and Shape Optimization minimizes component gage thicknesses, adjusts component radii, and updates component shapes to produce more optimal structures. Examples relevant to the Aerospace Industry are given to demonstrate optimization for metallic and composite structures.