scholarly journals Optimum Design of Geometrically Nonlinear Double-Layer Domes by Firefly Metaheuristic Algorithm

2013 ◽  
Vol 5 ◽  
pp. 169823 ◽  
Author(s):  
R. Kamyab Moghadas ◽  
A. Garakani ◽  
M. Kalantarzadeh
Keyword(s):  
Optimum Design ◽  
Double Layer ◽  
Geometrically Nonlinear ◽  
Metaheuristic Algorithm

Optimum design method for double-layer thick-walled concrete cylinder with different modulus

2010 ◽  
Vol 44 (5) ◽  
pp. 923-928 ◽  
Author(s):  
Ai-Zhong Lu ◽  
Gui-Sheng Xu ◽  
Lu-Qing Zhang
Keyword(s):  
Optimum Design ◽  
Double Layer ◽  
Design Method ◽  
Concrete Cylinder

The Optimum Design of Traveling-Wave Electroosmotic Micropumps

2009 ◽  
Author(s):  
Shou-Ping Hsu ◽  
Hong-Jun Ye ◽  
Win-Jet Luo ◽  
Jauh-Shyong Chen
Keyword(s):  
Electric Field ◽  
Optimum Design ◽  
Double Layer ◽  
Traveling Wave ◽  
Microelectrode Arrays ◽  
Operating Frequency ◽  
Optimum Operating ◽  
Gap Size ◽  
Wave Potential

This study investigates the performace of electroosmotic micropumps with arrays of microelectrodes for pumping electrolyte in a microchannel. Traveling-wave potentials are applied to the microelectrode arrays. Ions accumulate in the double layer in response to the applied signal. The electric field acts on the charge pulling the fluid in the direction of the traveling wave. In this study, the effects of the widths and heights of the electrodes, the gap size between the electrodes and the frequency of the applied traveling-wave potential on the pumping velocity of the micropump are investigated in order to obtain the optimum design of the micropump. The optimum operating frequency of the traveling-wave potential is about 1 kHz for the micropumps with different electrode widths and gap sizes. The pumping velocities increase with the decrease of the electrode widths and gap sizes for the micropumps. For the micropumps with different electrode widths and gap sizes, it is found the optimum electrode heights are about 5.5 μm when the gap sizes are less than the electrode widths, and the optimum electrode heights are about 10.4 μm when the gap sizes are greater than the electrode widths.

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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