Shape, sizing optimization and material selection based on mixed variables and genetic algorithm |
| |
Authors: | Xingang Tang David Hicham Bassir Weihong Zhang |
| |
Affiliation: | 1. Engineering Simulation and Aerospace Computing (ESAC), The Key Laboratory of Contemporary Design & Integrated Manufacturing Technology, Northwestern Polytechnical University, 710072, Xi??an, Shaanxi, China 2. Aerospace Structures, Faculty of Aerospace Engineering, Delft University of Technology, 2629 HS, Delft, The Netherlands 3. FIT/ESTP/Constructability, Research Institute, 28, Avenue Pr??sident Wilson, 94234, Cachan, France
|
| |
Abstract: | In this work, we explore simultaneous designs of materials selection and structural optimization. As the material selection turns out to be a discrete process that finds the optimal distribution of materials over the design domain, it cannot be performed with common gradient-based optimization methods. In this paper, material selection is considered together with the shape and sizing optimization in a framework of multiobjective optimization of tracking the Pareto curve. The idea of mixed variables is often introduced in the case of mono-objective optimization. However, in the case of multi-objective optimization, we still face some hard key points related to the convexity and the continuity of the Pareto domain, which underline the originality of this work. In addition to the above aspect, there is a lack in the literature concerning the industrial applications that consider the mixed parameters. Continuous variables refer to structural parameters such as thickness, diameter and spring elastic constants while material ID is defined as binary design variable for each material. Both mechanical and thermal loads are considered in this work with the aim of minimizing the maximum stress and structural weight simultaneously. The efficiency of the design procedure is demonstrated through various numerical examples. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|