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Dissertations / Theses on the topic 'Topology Optimizatoin'

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Published: 4 June 2021
Last updated: 6 September 2023

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1

Satha, Ganarupan. "Nutrient Driven Topology Optimization." Thesis, Linköpings universitet, Mekanik, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-70785.

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The aim of this thesis is to investigate how a biological structure changes its shape and boundary under different cases of load if flow of nutrients is included, since nutrient flow has not been taken into account in previous studies. In order to simulate such a scenario we construct a model by using topology optimization (the SIMP model) and a balance law which is suitable for biological structures. Moreover, the model is derived by using an analogy with the dissipation inequality and Coleman-Noll’s procedure. The model can be interpreted as bone or some other biological structure, where the
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2

Lu, Li Rong. "Topology optimization of acoustic metamaterials." 京都大学 (Kyoto University), 2014. http://hdl.handle.net/2433/189362.

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Zuo, Zihao, and Zhihao zuo@rmit edu au. "Topology optimization of periodic structures." RMIT University. Civil, Environmental and Chemical Engineering, 2009. http://adt.lib.rmit.edu.au/adt/public/adt-VIT20091217.151415.

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This thesis investigates topology optimization techniques for periodic continuum structures at the macroscopic level. Periodic structures are increasingly used in the design of structural systems and sub-systems of buildings, vehicles, aircrafts, etc. The duplication of identical or similar modules significantly reduces the manufacturing cost and greatly simplifies the assembly process. Optimization of periodic structures in the micro level has been extensively researched in the context of material design, while research on topology optimization for macrostructures is very limited and has grea
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LAGUN, TATIANA GOSSO. "TOPOLOGY OPTIMIZATION OF 2D STRUCTURES." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2001. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=2218@1.

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COORDENAÇÃO DE APERFEIÇOAMENTO DO PESSOAL DE ENSINO SUPERIOR<br>A determinação automática e ótima de uma topologia é um passo muito importante dentro do processo da otimização de estruturas. Normalmente, a busca da topologia ótima é o primeiro passo para a definição da configuração da estrutura, pois é nela que é encontrada uma distribuição ótima de material dentro de um domínio pré-estabelecido. Esta dissertação tem como objetivo apresentar uma metodologia simples de otimização topológica, dado um sistema estrutural, definido por suas condições de apoio, carregamento e um domínio de
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BARROS, GUILHERME COELHO GOMES. "TOPOLOGY OPTIMIZATION CONSIDERING LIMIT ANALYSIS." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2017. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=29908@1.

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PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO<br>CONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICO<br>Este trabalho apresenta uma formulação puramente baseada em plasticidade para ser aplicada à otimização topológica. A principal ideia da otimização topológica em mecânica dos sólidos é encontrar a distribuição de material dentro do domínio de forma a otimizar uma medida de performance e satisfazer um conjunto de restrições. Uma possibilidade é minimizar a flexibilidade da estrutura satisfazendo que o volume seja menor do que um determinado valor. Essa é a formulação clássica d
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THEDIN, REGIS SANTOS. "TOPOLOGY OPTIMIZATION USING POLYHEDRAL MESHES." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2014. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=37112@1.

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PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO<br>CONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICO<br>A otimização topológica tem se desenvolvido bastante e possui potencial para revolucionar diversas áreas da engenharia. Este método pode ser implementado a partir de diferentes abordagens, tendo como base o Método dos Elementos Finitos. Ao se utilizar uma abordagem baseada no elemento, potencialmente, cada elemento finito pode se tornar um vazio ou um sólido, e a cada elemento do domínio é atribuído uma variável de projeto, constante, denominada densidade. Do ponto de vista Eu
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7

Aremu, Adedeji. "Topology optimization for additive manufacture." Thesis, Loughborough University, 2013. https://dspace.lboro.ac.uk/2134/12833.

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Additive manufacturing (AM) offers a way to manufacture highly complex designs with potentially enhanced performance as it is free from many of the constraints associated with traditional manufacturing. However, current design and optimisation tools, which were developed much earlier than AM, do not allow efficient exploration of AM's design space. Among these tools are a set of numerical methods/algorithms often used in the field of structural optimisation called topology optimisation (TO). These powerful techniques emerged in the 1980s and have since been used to achieve structural solutions
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8

Yu, Tae-Joong. "Topology optimization under stress constraints." [Gainesville, Fla.] : University of Florida, 2003. http://purl.fcla.edu/fcla/etd/UFE0000831.

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9

PIZZOLATO, ALBERTO. "Topology optimization for energy problems." Doctoral thesis, Politecnico di Torino, 2018. http://hdl.handle.net/11583/2710567.

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The optimal design of energy systems is a challenge due to the large design space and the complexity of the tightly-coupled multi-physics phenomena involved. Standard design methods consider a reduced design space, which heavily constrains the final geometry, suppressing the emergence of design trends. On the other hand, advanced design methods are often applied to academic examples with reduced physics complexity that seldom provide guidelines for real-world applications. This dissertation offers a systematic framework for the optimal design of energy systems by coupling detailed physical an
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10

Wadbro, Eddie. "Topology Optimization for Wave Propagation Problems." Doctoral thesis, Uppsala universitet, Avdelningen för teknisk databehandling, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-98382.

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This thesis considers topology optimization methods for wave propagation problems. These methods make no a priori assumptions on topological properties such as the number of bodies involved in the design. The performed studies address problems from two different areas, acoustic wave propagation and microwave tomography. The final study discusses implementation aspects concerning the efficient solution of large scale material distribution problems. Acoustic horns may be viewed as impedance transformers between the feeding waveguide and the surrounding air. Modifying the shape of an acoustic hor
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11

Khoza, Dineo. "Topology optimization of plate-like structures." Pretoria : [s.n.], 2005. http://upetd.up.ac.za/thesis/available/etd-04102007-185634.

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12

Borrvall, Thomas. "Computational topology optimization in continuum mechanics /." Linköping : Univ, 2002. http://www.bibl.liu.se/liupubl/disp/disp2002/tek744s.pdf.

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13

Svärd, Henrik. "Topology Optimization of Fatigue-Constrained Structures." Doctoral thesis, KTH, Optimeringslära och systemteori, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-163575.

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Fatigue, or failure of material due to repeated cyclic loading, is one of the most common causes of mechanical failures. The risk of fatigue in a load carrying component is often lowered by adding material, thereby reducing stresses. This increases the component weight, reducing the performance of the component and increasing its manufacturing cost. There is thus a need to design components to be as light as possible, while keeping the risk of fatigue at a low enough level, i.e. there is a need for optimization of the component subject to fatigue constraints.  This thesis deals with design aga
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Browne, Philip. "Topology optimization of linear elastic structures." Thesis, University of Bath, 2013. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.577747.

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Topology optimization is a tool for finding a domain in which material is placed that optimizes a certain objective function subject to constraints. This thesis considers topology optimization for structural mechanics problems, where the underlying PDE is derived from linear elasticity. There are two main approaches for solving topology optimization: Solid Isotropic Material with Penalisation (SIMP) and Evolutionary Structural Optimization (ESO). SIMP is a continuous relaxation of the problem solved using a mathematical programming technique and so inherits the convergence properties of the op
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15

Goo, Zhen John. "Topology optimization of building bracing schemes." Thesis, Massachusetts Institute of Technology, 2013. http://hdl.handle.net/1721.1/82814.

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Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 2013.<br>Cataloged from PDF version of thesis. "June 2013."<br>Includes bibliographical references (p. 51-52).<br>The thesis presents a technique for producing economical solutions for conventional structural steel frames using topology optimization on the lateral bracing scheme. The study focuses mainly on minimizing the amount of material used and optimizing the placement of bracing elements in typical steel frame structures to achieve economical and realistic solutions. Linear structural a
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16

Pagonakis, Dimitrios. "Volumetric topology optimization under redundancy constraints." Thesis, Massachusetts Institute of Technology, 2016. http://hdl.handle.net/1721.1/104242.

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Thesis: M. Eng., Massachusetts Institute of Technology, Department of Civil and Environmental Engineering, 2016.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (pages 117-120).<br>With ever-increasing pollution and scarcity of resources, structural optimization, the science of finding the optimal structural arrangements under equilibrium constraints, is becoming an increasing necessity in engineering practice. However, designers are hesitant to adopt a method that is by nature a limit state and thus potentially unreliable. This thesis embeds a level of safety,
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17

Hägg, Linus. "Quasi-Arithmetic Filters for Topology Optimization." Licentiate thesis, Umeå universitet, Institutionen för datavetenskap, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-116983.

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Topology optimization is a framework for finding the optimal layout of material within a given region of space. In material distribution topology optimization, a material indicator function determines the material state at each point within the design domain. It is well known that naive formulations of continuous material distribution topology optimization problems often lack solutions. To obtain numerical solutions, the continuous problem is approximated by a finite-dimensional problem. The finite-dimensional approximation is typically obtained by partitioning the design domain into a finite
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18

Seifert, David Ryan. "Topology Optimization of Multifunctional Nanocomposite Structures." Diss., Virginia Tech, 2018. http://hdl.handle.net/10919/86195.

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This thesis presents the design of multifunctional structures through the optimal placement of nanomaterial additives. Varying the concentration of Carbon Nanotubes (CNTs) in a polymer matrix affects its local effective properties, including mechanical stiffness, electrical conductivity, and piezoresistivity. These local properties in turn drive global multifunctional performance objectives. A topology optimization algorithm determines the optimal distribution of CNTs within an epoxy matrix in an effort to design a set of structures that are capable of performing some combination of mechanical
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19

Holmberg, Erik. "Stress and fatigue constrained topology optimization." Licentiate thesis, Linköpings universitet, Mekanik, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-88094.

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This thesis concerns structural optimization in conceptual design stages, for which constraints that are adapted to industrial requirements have been developed for topology optimization problems. The objective of the project has been to identify and solve problems that today prevent structural optimization from being used in a broader sense in the avionic industry; the main focus has been on stress and fatigue constraints in topology optimization. The thesis consists of two parts. The rst part gives an introduction to topology optimization and describes the developed methods for stress and fat
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20

Deaton, Joshua D. "Design of Thermal Structures using Topology Optimization." Wright State University / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=wright1401302982.

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21

Haney, Mark A. "Topology Optimization of Engine Exhaust-Washed Structures." Wright State University / OhioLINK, 2006. http://rave.ohiolink.edu/etdc/view?acc_num=wright1168022947.

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22

Sankaranarayanan, S. "Topology optimization with simultaneous analysis and design." Diss., This resource online, 1992. http://scholar.lib.vt.edu/theses/available/etd-05042006-164513/.

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23

Sigmund, Ole. "Design of material structures using topology optimization /." Online version, 1994. http://bibpurl.oclc.org/web/34025.

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24

Hassan, Emadeldeen. "Topology optimization of antennas and waveguide transitions." Doctoral thesis, Umeå universitet, Institutionen för datavetenskap, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-102505.

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This thesis introduces a topology optimization approach to design, from scratch, efficient microwave devices, such as antennas and waveguide transitions. The design of these devices is formulated as a general optimization problem that aims to build the whole layout of the device in order to extremize a chosen objective function. The objective function quantifies some required performance and is evaluated using numerical solutions to the 3D~Maxwell's equations by the finite-difference time-domain (FDTD) method. The design variables are the local conductivity at each Yee~edge in a given design d
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25

Thellner, Mikael. "Multi-parameter topology optimization in continuum mechanics /." Linköping : Dept. of Mechanical Engineering, Univ, 2005. http://www.bibl.liu.se/liupubl/disp/disp2005/tek934s.pdf.

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26

HOSHINA, THOMÁS YOITI SASAKI. "TOPOLOGY OPTIMIZATION WITH ADAPTIVE POLYGONAL MESH REFINEMENT." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2016. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=27874@1.

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PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO<br>A otimização topológica tem como objetivo encontrar a distribuição mais eficiente de material (ótima topologia) em uma determinada região, satisfazendo as restrições de projeto estabelecidas pelo usuário. Na abordagem tradicional atribui-se uma variável de projeto, constante, denominada densidade, para cada elemento finito da malha. Dessa forma, a qualidade da representação dos novos contornos da estrutura depende do nível de discretização da malha: quanto maior a quantidade de elementos, mais bem definida será a topologia da estrutura otim
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27

Chapman, Colin Donald. "Structural topology optimization via the genetic algorithm." Thesis, Massachusetts Institute of Technology, 1994. http://hdl.handle.net/1721.1/35410.

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28

Clark, Patrick Ryan. "Reliability-Based Topology Optimization with Analytic Sensitivities." Thesis, Virginia Tech, 2017. http://hdl.handle.net/10919/78665.

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It is a common practice when designing a system to apply safety factors to the critical failure load or event. These safety factors provide a buffer against failure due to the random or un-modeled behavior, which may lead the system to exceed these limits. However these safety factors are not directly related to the likelihood of a failure event occurring. If the safety factors are poorly chosen, the system may fail unexpectedly or it may have a design which is too conservative. Reliability-Based Design Optimization (RBDO) is an alternative approach which directly considers the likelihood of f
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Wadbro, Eddie. "Topology optimization for acoustic wave propagation problems." Licentiate thesis, Uppsala universitet, Avdelningen för teknisk databehandling, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-86427.

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The aim of this study is to develop numerical techniques for the analysis and optimization of acoustic horns for time harmonic wave propagation. An acoustic horn may be viewed as an impedance transformer, designed to give an impedance matching between the feeding waveguide and the surrounding air. When modifying the shape of the horn, the quality of this impedance matching changes, as well as the angular distribution of the radiated wave in the far field (the directivity). The dimensions of the horns considered are in the order of the wavelength. In this wavelength region the wave physics is c
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Larsen, Shane H. "Recognizing Parametric Geometry from Topology Optimization Results." BYU ScholarsArchive, 2010. https://scholarsarchive.byu.edu/etd/2072.

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Topology Optimization has been proven to be a useful tool in discovering non-intuitive optimal designs subject to certain design constraints. The results of Topology Optimization are either represented as a tessellation object composed of thousands of triangular surfaces, or as a point cloud. In either case, the results of Topology Optimization are not suited for use in subsequent steps of the design process which require 3D parametric CAD (Computer Aided Design) models. Converting Topology Optimization results into parametric CAD geometry by hand is an extremely tedious and time consuming pro
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31

Ajayi, Oluwanifemi O. (Oluwanifemi Oluwadara). "Topology optimization with manufacturable multi-material primitives." Thesis, Massachusetts Institute of Technology, 2019. https://hdl.handle.net/1721.1/123215.

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Thesis: M. Eng., Massachusetts Institute of Technology, Department of Civil and Environmental Engineering, 2019<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (pages 32-33).<br>Topology optimization is a field extending to the built environment. Traditionally, optimization focuses mainly on monolithic structures but recently, developments have been made toward determining algorithms for multi-material optimization. A preexisting algorithm is modified to broaden the type of design possible with the method. The algorithm uses a three-phase design problem, a void
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32

Feppon, Florian. "Shape and topology optimization of multiphysics systems." Thesis, Université Paris-Saclay (ComUE), 2019. http://www.theses.fr/2019SACLX080/document.

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Cette thèse est consacrée à l'optimisation de la topologie et de la forme de systèmesmultiphysiques motivés par des applications de l'industrie aéronautique. Nouscalculons les dérivées de forme de fonctions de coût arbitraires pour un modèlefluide, thermique et mécanique faiblement couplé. Nous développons ensuite unalgorithme de type gradient adapté à la résolution de problèmes d'optimisation deformes sous contraintes qui ne requiert par de réglage de paramètres nonphysiques. Nous introduisons ensuite une méthode variationnelle qui permet decalculer des intégrales le long de rayons sur un mai
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Schmidt, Martin-Pierre. "Computational generation and optimization of mechanical structures On structural topology optimization using graded porosity control Structural topology optimization with smoothly varying fiber orientations." Thesis, Normandie, 2020. http://www.theses.fr/2020NORMIR01.

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Cette thèse étudie et développe des méthodes de modélisation mathématique, analyse et optimisation numérique appliquées à la génération d’objets 3D. Les approches proposées sont utilisées pour la génération de structures lattices et de structure continue par optimisation topologique<br>This thesis studies and develops methods for mathematical modeling, numerical analysis and optimization applied to the generation of 3D objects. The proposed approaches are used to generate lattice structures and continuum structures with topology optimization
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Santos, Renatha Batista dos. "Topology optimization of strucutres under plane strain assumption." Laboratório Nacional de Computação Científica, 2012. http://www.lncc.br/tdmc/tde_busca/arquivo.php?codArquivo=241.

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The topological derivative measures the sensitivity of a given shape functional with respect to an infinitesimal singular domain perturbation, such as the insertion of holes, inclusions or source-terms. The topological derivative has been successfully applied in obtaining the optimal topology for a large class of physics and engineering problems. In this work a methodology for the topology optimization of structures under plane strain assumption is presented. The idea is to minimize the structural compliance under volume constraint. Since we are dealing with multiple load-cases, a multi-objec
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35

Šešok, Dmitrij. "Topology optimization of truss structures using genetic algorithms." Doctoral thesis, Lithuanian Academic Libraries Network (LABT), 2008. http://vddb.library.lt/obj/LT-eLABa-0001:E.02~2008~D_20080723_095430-52584.

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The dissertation deals with the topology optimization problems of the truss systems. The main aim of the work is to create a technology and implementing algorithms for topology optimization and for simultaneous topology and shape optimization of truss systems. The genetic algorithms are used as the main tool for optimization. The topology optimization problems are formulated using the so-called ground structure approach.<br>Disertacijoje nagrinėjamos santvarų globalaus optimizavimo problemos. Pagrindinis darbo tikslas – sukurti technologiją ir ją aprašančius algoritmus santvarų topologijos opt
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36

Bin, Mohamed Taib I. "Topology, shape and sizing optimization of plate structures." Thesis, Swansea University, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.636098.

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This thesis deals with structural topology, shape and sizing optimization of plate structures which are the necessary building blocks of a fully integrated design optimization (FIDO) system. The thesis is restricted to plates subjected to lateral loading which are modelled using Mindlin-Reissner (MR) assumptions and to a lesser extent plates subjected to in-plane loading modelled using plane stress assumptions. Stiffened plates with MR plate and Timoshenko beam models used to represent the combined system are briefly considered. In this thesis, for Fe analysis, the 9-node MR plate elements and
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Hassan, Emadeldeen. "Metallic antenna design based on topology optimization techniques." Licentiate thesis, Umeå universitet, Institutionen för datavetenskap, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-76691.

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Garla, Venkatakrishnaiah Sharath Chandra, and Harivinay Varadaraju. "Validation of Black-and-White Topology Optimization Designs." Thesis, Linköpings universitet, Mekanik och hållfasthetslära, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-174807.

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Topology optimization has seen rapid developments in its field with algorithms getting better and faster all the time. These new algorithms help reduce the lead time from concept development to a finished product. Simulation and post-processing of geometry are one of the major developmental costs. Post-processing of this geometry also takes up a lot of time and is dependent on the quality of the geometry output from the solver to make the product ready for rapid prototyping or final production. The work done in this thesis deals with the post-processing of the results obtained from topology op
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Li, Yilun. "Numerical methodologies for topology optimization of electromagnetic devices." Thesis, Sorbonne université, 2019. http://www.theses.fr/2019SORUS228.

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L'optimisation de la topologie est la conception conceptuelle d'un produit. En comparaison avec les approches de conception conventionnelles, il peut créer une nouvelle topologie, qui ne pouvait être imaginée à l’avance, en particulier pour la conception d’un produit sans expérience préalable ni connaissance. En effet, la technique de la topologie consistant à rechercher des topologies efficaces à partir de brouillon devient un sérieux atout pour les concepteurs. Bien qu’elle provienne de l'optimisation de la structure, l'optimisation de la topologie en champ électromagnétique a prospéré au co
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Ivanov, Dinko. "Gearbox housing design – topology optimization through generative design." Thesis, KTH, Maskinkonstruktion (Avd.), 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-244983.

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Detta examensarbete använder ett systematiskt tillvägagångssätt för att omkonstruera ett växellådshus till ett elektriskt fordon med avsikt att förbättra prestanda med avseende på hållfasthet, livslängd och styvhet. I examensarbetet ges även en kort beskrivning av hur växellådan fungerar, vilken roll den spelar i de elektriska fordonen, samt grundläggande teori som används  vid konstruktion av liknande växellådor. Den huvudsakliga arbetsmetoden som använts för att nå målen är topologioptimering och olika lösningar har simulerats för att förenkla den framtida omkonstruktionen. Analyser av de ol
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Fu, Dianbo. "Topology Investigation and System Optimization of Resonant Converters." Diss., Virginia Tech, 2010. http://hdl.handle.net/10919/27783.

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Over the past several years, energy efficiency and power density have become the top concerns for power conversion. Rising energy intensity leads to a higher cost of delivering power. Meanwhile, the demand for compact power supplies grows significantly. It requires power supplies with high efficiency, low profile and high power density. Dc-dc power conversion has been widely applied for industry, medial, military and airspace applications. Conventional PWM dc-dc converters have relatively low power transfer efficiency and low power density. In contrast, resonant dc-dc converters have numerous
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Bhela, Siddharth. "Load Learning and Topology Optimization for Power Networks." Diss., Virginia Tech, 2019. http://hdl.handle.net/10919/90407.

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With the advent of distributed energy resources (DERs), electric vehicles, and demand-response programs, grid operators are in dire need of new monitoring and design tools that help improve efficiency, reliability, and stability of modern power networks. To this end, the work in this thesis explores a generalized modeling and analysis framework for two pertinent tasks: i) learning loads via grid probing, and; ii) optimizing power grid topologies for stability. Distribution grids currently lack comprehensive real-time metering. Nevertheless, grid operators require precise knowledge of loads and
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Rakshit, Abhik. "Finite Element Analysis of Problems in Topology Optimization." University of Cincinnati / OhioLINK, 2003. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1060966523.

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44

Cheerkapally, Raghavender P. "Topology Optimization of Structures using Hybrid Cellular Automata." University of Cincinnati / OhioLINK, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1243371266.

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45

Holmberg, Erik. "Topology optimization considering stress, fatigue and load uncertainties." Doctoral thesis, Linköpings universitet, Mekanik och hållfasthetslära, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-123008.

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This dissertation concerns structural topology optimization in conceptual design stages. The objective of the project has been to identify and solve problems that prevent structural topology optimization from being used in a broader sense in the avionic industry; therefore the main focus has been on stress and fatigue constraints and robustness with respect to load uncertainties. The thesis consists of two parts. The first part gives an introduction to topology optimization, describes the new contributions developed within this project and motivates why these are important. The second part inc
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46

Dinesh, M. "Design Of Two-Axis Displacement-Amplifying Compliant Mechanisms Using Topology Optimization." Thesis, 2008. http://hdl.handle.net/2005/751.

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This thesis deals with the design of two-axis displacement-amplifying compliant mechanisms (DaCMs) using topology optimization. The two-axis compliant mechanisms considered here are XY positioners and two-axis inertial sensors. A building block approach, with several single-axis DaCMs as building blocks, is used to conceive designs of compliant platforms that provide two orthogonal and independent movement of a common platform. Spring-mass-lever (SML) models of these designs are developed to simplify the analysis and design of the complicated arrangements of building blocks. The XY positioner
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Jan, Tian-Tso, and 詹天佐. "Topology Optimization Using Multidisciplinary Optimization Technologies." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/23365688652235769580.

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碩士<br>大葉大學<br>機電自動化研究所碩士班<br>93<br>ABSTRACT 　　One of the major difficulties of implementing topology optimization techniques is that it is very time consuming. The computational cost is always very high and sometimes just not acceptable. Most of the researches consider the whole design space of topology optimization problems as a single system. In other words, all design variables are handled simultaneously in single optimization run. This paper proposed a concurrent subsystem optimization method the divides a topology optimization problem into several optimization sub-problems. The
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Patel, Neal M. "Crashworthiness design using topology optimization." 2007. http://etd.nd.edu/ETD-db/theses/available/etd-07172007-013825/.

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Thesis (Ph. D.)--University of Notre Dame, 2007.<br>Thesis directed by John E. Renaud for the Department of Aerospace and Mechanical Engineering. "July 2007." Includes bibliographical references (leaves 174-179).
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翁振恭. "Topology Optimization Using Genetic Algorithms." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/60640686215260006201.

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碩士<br>大葉大學<br>自動化工程學系碩士班<br>92<br>Genetic Algorithm, based on the Darwin''s survival of fittest principle, is a robust optimization technique in finding global minima. The main advantage of using Genetic Algorithm in topology optimization is that it can find out several optimal or near optimal solutions for problems with or without multiple optima. Traditional GA encodes design variables into a one-dimensional genetic bit-string and thus only one-dimensional crossover operations such as single-point and multi-point crossover operations can be used. However, single-point a
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Ciou, Yi-Hong, and 邱奕弘. "Topology optimization using genetic algorithms." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/53114896632662266199.

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碩士<br>國立中興大學<br>機械工程學系所<br>101<br>When gradient-based search methods are used to solve topology optimization problems, gray elements may result. In reality, these elements should not exist. Therefore, this thesis tries to use genetic algorithm to find the optimum topology. The topology optimization problems are minimum compliance design subjected to the material constraint. The softwares used to create and analyze the models are MSC.Patran and MSC.Nastran. Because of random search nature of genetic algorithm, disconnected topologies may appear and tremendous computational time is needed.
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