Automated optimal stiffener pattern design

摘要

An automated topology optimization based approach is proposed to generate the optimal stiffener pattern of 3D shell structures with the objective of maximizing a band of eigenfrequencies. The methodology is based on a fiber-reinforced compositemodel in which the stiffeners and base structure are modeled as fibers and matrix, respectively. Solutions to the optimization problem are obtained by means of an iterative, two-level procedure based on an optimality criterion approach and a method ofmathematical programming using analytical sensitivity analysis. Two numerical examples are presented to demonstrate the effectiveness of the proposed approach.