A parallel particle swarm optimization algorithm accelerated by asynchronous evaluations (2008)
World Congresses Of, Gerhard Venter, Jaroslaw Sobieszczanski-sobieski
A parallel Particle Swarm Optimization (PSO) algorithm is presented. Particle swarm optimization is a fairly recent addition to the family of non-gradient based, probabilistic search algorithms that...
Sensitivities of displacements and stresses with respect to changes in shape and topology (2008)
World Congresses Of, Krister Svanberg, Mats Werme
This presentation deals with sensitivity calculations for load-carrying linearly elastic continuum structures which are discretized by a finite element model. The topology and shape of the considered...
World Congresses Of, Angelo Passaro, Jonas Rubini Júnior, Nancy Mieko Abe, Milton Sasaki, Josemir Coelho Santos
In the last few years, innovative electro-optic sensors, such as Optical Voltage and Optical Current Transformers, have been developed and used for high-voltage and high-current measurements in power...
6 th World Congresses of Structural and Multidisciplinary Optimization (2005)
World Congresses Of, Gustavo C. Buscaglia, Alfredo F. Quiroga, Guy Bayada, Mohamed Jai
The design of optimal, tailor-engineered tribological surfaces is attracting much attention due to the availability of novel fabrication technologies such as laser texturing, UV lithography, LIGA...
World Congresses Of, Henry Cortés, Andrés Tovar, José D. Muñoz, Neal M. Patel, John E. Renaud
Cellular automata (CAs) have been used as an alternative to represent macroscopic behavior of continuum systems governed by non-linear partial di#erential equations (PDEs). This task is generally...
An Improved Controlled Random Search Algorithm for Inverse Airfoil Cascade Design (2005)
World Congresses Of, Nelson Manzanares-filho, Carlos Alberto, Amaral Moino, Ariosto Bretanha Jorge
An improved version of the Controlled Random Search Algorithm (CRSA) for global minimization of continuous real functions on a R box is proposed and applied to inverse airfoil cascade design. A CRSA...
World Congresses Of, J. París, I. Muíños, F. Navarrina, I. Colominas, M. Casteleiro
Since Bendse and Kikuchi proposed the basic concepts in 1988, most of topology structural optimization results have been obtained so far by means of a maximum sti#ness (minimum strain energy, minimum...
Inverse problem for two–dimensional flow around a profile (2005)
World Congresses Of, Jaroslav Pelant, Karel Adámek
The main purpose of this paper is to describe a numerical method of an inverse problem for two-- dimensional flow of fluid around a profile. The principle of the method is based on construction of a...
Application of Large-scale Layout Optimization Techniques in Structural Engineering Practice (2005)
World Congresses Of, Matthew Gilbert, Wael Darwich, Andy Tyas, Paul Shepherd
A number of promising techniques which allow treatment of very large-scale plastic truss layout optimization problems incorporating multiple load cases, self weight and practical nodal stability...
Adaptive Method for Shape Optimization (2005)
World Congresses Of, Jean R. Roche
The aim of this work is to introduce an adaptive strategy to monitor the rate of convergence of a Newtonlike method in shape optimization. Numerical solution of this problem involves numerical...
Optimal Design of Functionally Graded Reissner–Mindlin Plates (2005)
World Congresses Of, M. Bruggi, C. Cinquini, L. Della Croce, P. Venini
Equations governing the behavior of rectangular plates made of functionally graded materials (FGMs) are determined in this paper using the variational approach. Derivation of such equations is based...
Optimum Placement of a Wafer on a Rectangular Chip Grid (2005)
World Congresses Of, Youzou Fukagawa, Yuji Shinano, Tomoyuki Wada, Mario Nakamori
Recently, there has been increasing interest in the problem of wafer placement on a chip grid with the objective of maximizing the number of available chips per wafer. This problem is referred to as...
World Congresses Of, André Labanowski Júnior, Eduardo Alberto Fancello, Antonio André Novotny
Most of the approaches found in literature dealing with topology design sequences are based on sensitivity information. In the present work, we revisit the approaches SIMP (Solid Isotropic...
Fast Reanalysis of Geometrically Nonlinear Problems After Shape Modifications (2005)
World Congresses Of, Mirko Zeoli, Fred Van Keulen, Matthijs Langelaar
Fast Reanalysis for geometrically nonlinear problems using either Newton iterations or Modified Newton iterations starting from a previously obtained solution can be e#cient. However, the first...
Physically Constrained Neural Networks and Regularization of Inverse Problems (2005)
World Congresses Of, Souza De Cursi
The solution to a variety of engineering problems entails the simulation of a physical system. The main component of a simulator is a model that must accurately depict the system behaviour. There are...
Optimization and Systems Theory (2005)
World Congresses Of, Mats Werme, Krister Svanberg
This paper addresses topology optimization problems defined on discretized linearly elastic continuum structures. The discretized topology optimization problem is modelled as a mixed integer...
Topology optimization using the finite volume method (2005)
World Congresses Of, A. Gersborg-hansen, M. P. Bendsøe, O. Sigmund
This papers addresses the use of the finite volume method (FVM) for topology optimization of a heat conduction problem. Issues pertaining to the sensitivity analysis and the application of the FVM to...
Constrained Particle Swarm Optimization of Mechanical Systems (2005)
World Congresses Of, Kai Sedlaczek, Peter Eberhard
Using Particle Swarm Optimization (PSO) for solving nonlinear, multimodal and non-di#erentiable optimization problems has gained increasing attention in recent years. Based on the social behavior and...
Generalized Shape optimization based on the Level Set method (2005)
World Congresses Of, Laurent Van Miegroet, Nicolas Moës, Claude Fleury, Pierre Duysinx
This paper describes a first step work devoted to applying XFEM and Level Sets methods in optimization of structures. This first step work is based on integrating an existing XFEM code within a...
Globally Convergent Topology Optimization using Level Set Method (2005)
World Congresses Of, Kang-soo Park, Sung-kie Youn
Main objective of this research is to develop and implement a numerical procedure to guarantee global convergence of the level set based topology optimization method. To verify the proposed topology...
Layout Optimization of Elasto-Plastic Structures Subjected to Time-Dependent Loading (2005)
World Congresses Of, János Lógó
In the engineering practice it is very common that during the analysis and design process the designers should take into consideration time dependent loading and/or the state variables are time...
Development of Optimization Methodology for Reduction of Defect Risk at Blow Forming (2005)
World Congresses Of, Igor Gresovnik, Stanislav Hartman, Tomaz Rodic
The problem of crack formation at blow forming of aluminium evaporators' channel systems is addressed. We focused on the possibility of reducing the risk for crack formation by changing channel...
Mini-Max Type Robust Optimal Design Combined with Function Regularization (2005)
World Congresses Of, Noriyasu Hirokawa, Kikuo Fujita, Fam Chiou Tzi
This paper proposes a mini-max type robust optimal design and its enhancement by using function regularization. A mini-max type robust optimal design seeks the optimal solution based on the bounding...
Design of Compliant Mechanisms Considering Thermal Compensation (2005)
World Congresses Of, Wagner Shin Nishitani, Wilfredo Montealegre Rubio, Emílio Carlos, Nelli Silva
Compliant mechanisms attain their mobility from flexibility of their structure instead of depending on hinges, bearings and sliders. Their main advantages are that they can be built using fewer...
Filter techniques in shape optimization with CAD-free parametrization (2005)
World Congresses Of, F. Daoud, M. Firl
In this contribution an innovative method for shape optimization with parametrization directly on FE mesh is proposed. The major shortcomings of CAD-free parametrization are discussed and global...
An Inverse Method for Parameter Estimation in Active Laminated Structures (2005)
World Congresses Of, Aurélio L. Araújo, José Herskovits, Pauli Pedersen
This paper addresses the problem of elastic and piezoelectric parameter estimation in active laminated structures with surface bonded sensors and actuators. The proposed technique is non destructive...
Optimisation of a CVT-Chain (2005)
World Congresses Of, Lutz Neumann, Heinz Ulbrich
In order to account for current and future requirements regarding the further improvement of the dynamical behaviour of a chain CVT (Continuous Variable Transmission) optimisation methods are...
World Congresses Of, Eisuke Nagashima, Toshiro Maeda
structure model, especially S-wave velocity structure of the site of consideration. Inversion analysis with micro-tremor observation is frequently used to acquire S-wave velocity structure due to its...
Topology Optimization of Building Blocks for Photonic Integrated Circuits (2005)
World Congresses Of, Jakob Søndergaard Jensen, Ole Sigmund
Photonic integrated circuits are likely candidates as high speed replacements for the standard electrical integrated circuits of today. However, in order to obtain a satisfactorily performance many...
Optimal topologies for micropolar solids (2005)
World Congresses Of, Marco Rovati, Daniele Veber
Micropolar field theory represents an extension of the classical Cauchy continuum theory. In this paper, a topology optimization procedure for maximum sti#ness is applied to structural elements made...
Multi-objective Optimization of Reinforced Concrete Frames (2005)
World Congresses Of, Matěj Lepš
This paper presents a discrete optimization of reinforced concrete structures based on an efficient combination of deterministic and stochastic optimization strategies. The deterministic optimization...
Sensitivity Analysis with the Simplified Hybrid Boundary Element Method (2005)
World Congresses Of, Ney A. Dumont
The paper describes a formulation for computing design sensitivities required in inverse problems as well as in shape or material property optimization in the frame of the hybrid boundary element...
6 th World Congresses of Structural and Multidisciplinary Optimization (2005)
World Congresses Of, E. Schnack, R. Tsotsova, S. Dimitrov
The paper deals with the identification of the delamination in composites on the basis of the information for the displacements from the surfaces of damaged bodies. The identification of the active...