Multi-objective design optimization of variable ribs composite grid plates

Grid structures are among the most lightweight elements for stiffening the plates and shells or as self-sufficient structures. There are different known grid patterns, which are composed of variable numbers of parallel ribs. Selecting an optimum pattern and geometries for a grid to achieve the minim...

Full description

Saved in:
Bibliographic Details
Published in:Structural and multidisciplinary optimization 2021, Vol.63 (1), p.407-418
Main Authors: Ehsani, Amir, Dalir, Hamid
Format: Article
Language:English
Subjects:
Bearing capacity
Buckling
Computational Mathematics and Numerical Analysis
Design optimization
Engineering
Engineering Design
Genetic algorithms
Industrial Application Paper
Minimum weight
Multiple objective analysis
Plate theory
Ritz method
Shear deformation
Stiffening
Theoretical and Applied Mechanics
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Grid structures are among the most lightweight elements for stiffening the plates and shells or as self-sufficient structures. There are different known grid patterns, which are composed of variable numbers of parallel ribs. Selecting an optimum pattern and geometries for a grid to achieve the minimum weight and maximum load-bearing capacity is a challenging procedure for designers. In the current study, a variable ribs model (VRM) is proposed to find the optimum architecture of a grid plate. Therefore, using a genetic algorithm process, a multi-objective optimization is implemented to maximize the axial or shear buckling loads at a minimum possible weight of a grid structure. Eleven geometrical parameters including thickness, width, and the number of ribs as well as the orientation of the grid plate are considered the design variables. The multi-objective optimization is carried out employing the ε-constraint method. The buckling loads are obtained based on the first-order shear deformation plate theory using the Ritz method.
ISSN:1615-147X
1615-1488
DOI:10.1007/s00158-020-02672-7