scholarly journals A shape optimization approach to integrated design and nonlinear analysis of tensioned fabric membrane structures with boundary cables

2016 ◽  
Vol 83 ◽  
pp. 114-125 ◽  
Author(s):  
T.D. Dinh ◽  
A. Rezaei ◽  
W. Punurai ◽  
L. De Laet ◽  
M. Mollaert ◽  
...  
Keyword(s):  
Shape Optimization ◽  
Nonlinear Analysis ◽  
Integrated Design ◽  
Optimization Approach ◽  
Membrane Structures

Shape and parameter reconstruction for the Robin transmission inverse problem

2016 ◽  
Vol 24 (6) ◽  
Author(s):  
Antoine Laurain ◽  
Houcine Meftahi
Keyword(s):  
Inverse Problem ◽  
Shape Optimization ◽  
Saddle Point Problem ◽  
Point Problem ◽  
Optimization Approach ◽  
Reconstruction Method ◽  
Piecewise Constant ◽  
Piecewise Constant Conductivity ◽  
Level Set Approach ◽  
Parameter Reconstruction

AbstractIn this paper we consider the inverse problem of simultaneously reconstructing the interface where the jump of the conductivity occurs and the Robin parameter for a transmission problem with piecewise constant conductivity and Robin-type transmission conditions on the interface. We propose a reconstruction method based on a shape optimization approach and compare the results obtained using two different types of shape functionals. The reformulation of the shape optimization problem as a suitable saddle point problem allows us to obtain the optimality conditions by using differentiability properties of the min-sup combined with a function space parameterization technique. The reconstruction is then performed by means of an iterative algorithm based on a conjugate shape gradient method combined with a level set approach. To conclude we give and discuss several numerical examples.

scholarly journals MINIMIZING FLOORING STRIP WEIGHT: A SHAPE OPTIMIZATION APPROACH

BioResources ◽  
2012 ◽  
Vol 7 (2) ◽  
Author(s):  
Jean Deteix ◽  
George Djoumna ◽  
Pierre Blanchet ◽  
André Fortin ◽  
Alain Cloutier
Keyword(s):  
Shape Optimization ◽  
Optimization Approach

An Integrated Design Optimization Approach for Quantitative and Qualitative Search Space

2003 ◽  
Author(s):  
Victor Oduguwa ◽  
Rajkumar Roy ◽  
Didier Farrugia
Keyword(s):  
Real World ◽  
Design Problem ◽  
Integrated Design ◽  
Search Space ◽  
Optimization Approach ◽  
Design Optimisation ◽  
Solution Approach ◽  
Rod Rolling ◽  
Algorithmic Engineering ◽  
Real World Problems

Most of the algorithmic engineering design optimisation approaches reported in the literature aims to find the best set of solutions within a quantitative (QT) search space of the given problem while ignoring related qualitative (QL) issues. These QL issues can be very important and by ignoring them in the optimisation search, can have expensive consequences especially for real world problems. This paper presents a new integrated design optimisation approach for QT and QL search space. The proposed solution approach is based on design of experiment methods and fuzzy logic principles for building the required QL models, and evolutionary multi-objective optimisation technique for solving the design problem. The proposed technique was applied to a two objectives rod rolling problem. The results obtained demonstrate that the proposed solution approach can be used to solve real world problems taking into account the related QL evaluation of the design problem.

scholarly journals On a numerical shape optimization approach for a class of free boundary problems

2020 ◽  
Vol 77 (2) ◽  
pp. 509-537
Author(s):  
A. Boulkhemair ◽  
A. Chakib ◽  
A. Nachaoui ◽  
A. A. Niftiyev ◽  
A. Sadik
Keyword(s):  
Free Boundary ◽  
Shape Optimization ◽  
Free Boundary Problems ◽  
Optimization Approach ◽  
Boundary Problems

Increasing Radiation Efficiency Using Antenna Shape Optimization Approach

2018 ◽  
Vol 17 (3) ◽  
pp. 393-396 ◽  
Author(s):  
Ruiyang Li ◽  
Derek McNamara ◽  
Gao Wei ◽  
Jianzhou Li
Keyword(s):  
Shape Optimization ◽  
Radiation Efficiency ◽  
Optimization Approach

WINDOPT: An Optimization Tool for Floating Support Structures for Deep Water Wind Turbines

2011 ◽  
Author(s):  
Ivar Fylling ◽  
Petter Andreas Berthelsen
Keyword(s):  
Optimization Problems ◽  
Integrated Design ◽  
Design Tool ◽  
Mooring Line ◽  
Curvature Radius ◽  
Optimization Approach ◽  
Mooring System ◽  
Simple Relationship ◽  
Line Load ◽  
Geometrical Properties

An integrated design tool for optimization of a floating wind turbine support structure of the spar buoy type, including mooring system and power takeoff cable, is described in this paper. The program utilizes efficient design tools for analysis of mooring system forces and vessel motions, and combines this with a gradient method for solution of non-linear optimization problems with arbitrary constraints. The objective function to be minimized is the spar buoy cost, and the mooring line and cable costs. Typical design requirements that may be included as constraints are: mooring line load limitations and minimum fatigue life, cable curvature radius, cable tension, tower top acceleration, and vessel motion and inclination. The spar buoy is modelled as composed of a set of cylindrical sections with different mass, buoyancy and cost properties, where each section is assumed to have a uniform mass distribution. It is assumed that a representative initial cost figure is available, and that it can be scaled in proportion with material mass. A simple relationship between mass and geometrical properties is proposed for both massive and thin walled tubular sections. Examples are included to demonstrate the various aspects of the optimization approach, including different parameterizations of the spar buoy.

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