scholarly journals Stiffener Layout Optimization of Inlet Structure for Electrostatic Precipitator by Improved Adaptive Growth Method

2014 ◽  
Vol 6 ◽  
pp. 979604 ◽  
Author(s):  
Jin Ji ◽  
Xiaohong Ding
Keyword(s):  
Electrostatic Precipitator ◽  
Layout Optimization ◽  
Adaptive Growth ◽  
Stiffener Layout ◽  
Growth Method ◽  
Stiffener Layout Optimization ◽  
Adaptive Growth Method

scholarly journals Bionic Stiffener Layout Optimization with a Flexible Plate in Solar-Powered UAV Surface Structure Design

2019 ◽  
Vol 9 (23) ◽  
pp. 5196 ◽  
Author(s):  
You Ding ◽  
Zhou Zhou ◽  
ZhengPing Wang ◽  
HongJun Liu ◽  
KeLei Wang
Keyword(s):  
Surface Structure ◽  
Structure Design ◽  
Flexible Plate ◽  
Long Span ◽  
L System ◽  
Final Design ◽  
Stiffener Layout ◽  
Solar Powered ◽  
Searching Method ◽  
Stiffener Layout Optimization

A cellular-based evolutionary topology optimization scheme over a small curvature big contour wing surface is proposed for the design of an ultralight surface structure. Using this method, a ground-structure technique is first applied to obtain homogeneous mesh generation with a predefined weight value over the design domain. Secondly, the stiffener path’s description is guided by a modified map L system topology method that simulates the growth of the bionic branch, and the structural components are obtained by the specified searching method according to weights of the previous mesh vertexes. Thirdly, an optimal curved stiffener layout is achieved using an agent-based algorithm to create individual instances of designs based on a small number of input parameters. These parameters can then be controlled by a genetic algorithm to optimize the final design according to goals like minimizing weight and structural weakness. A comparison is implemented for long-span panel stiffener layout generation between an initial straight case and a bionic optimal case via our method, thereby indicating the significant improvement of the buckling loads by steering the stiffener’s path. Finally, this bionic method is applied to the wing box structure design and achieves remarkable weight loss at last.

An Adaptive Growth Method for Shape Refinement: Methodology and Applications to Pressure Vessels and Piping

1992 ◽  
Vol 114 (1) ◽  
pp. 87-93 ◽  
Author(s):  
H. Azegami ◽  
A. Okitsu ◽  
T. Ogihara ◽  
A. Takami
Keyword(s):  
Dynamic Test ◽  
Pressure Vessels ◽  
Test Problems ◽  
Piping System ◽  
Simple Shape ◽  
Bulk Strain ◽  
Growth Method ◽  
Deformation Step ◽  
Adaptive Growth Method ◽  
Measure Distribution

A simple shape refinement technique for improving strength has been developed. The technique is to deform shapes with growth bulk strain which springs up in proportion with deflection of a strength measure to a basic value in all parts of a body. The scheme for the shape refinement consists of the iteration of the two steps with finite element method: 1) analysis step of a strength measure distribution, and 2) growth deformation step with the growth bulk strain. Numerical experiments on static and dynamic test problems and practical problems of pressure vessel and piping system indicate the effectiveness of this technique for improving strength.

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