Minimum weight shape and size optimization of truss structures made of uncertain materials

1998 ◽  
Vol 16 (2-3) ◽  
pp. 147-154 ◽  
Author(s):  
E. Barbieri ◽  
M. Lomhardi
Keyword(s):  
Minimum Weight ◽  
Truss Structures ◽  
Size Optimization ◽  
Shape And Size

scholarly journals Simultaneous Shape and Size Optimization of Double-layer Grids with Nonlinear Behavior

2020 ◽  
Author(s):  
Ali Kaveh ◽  
Mehran Moradveisi
Keyword(s):  
Optimum Design ◽  
Double Layer ◽  
Minimum Weight ◽  
Geometrical Nonlinearity ◽  
Nonlinear Behavior ◽  
Optimization Method ◽  
Size Optimization ◽  
Colliding Bodies Optimization ◽  
Load And Resistance Factor ◽  
Shape And Size

The main aim of this paper is to present a new solution for simultaneous shape and size optimization of double-layer grids. In order to find the optimum design, Enhanced Colliding Bodies Optimization method is applied to the optimum design of the most common examples of double-layer grids, while both material and geometrical nonlinearity are taken into account. The small and big sizes of span length are considered for each type of square grids. The algorithm gets the minimum weight grid by finding the best nodal location in z-direction (height of the structure) and the suitable selection from the list of tube sections available in American Institute of Steel Construction Load and Resistance Factor Design, simultaneously. All examples are optimized with strength and displacement constraints. The numerical results demonstrate the efficiency and robustness of the presented method for solving real-world practical double-layer grids.

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