Search for dissertations about: "continuum design sensitivity"

Showing result 1 - 5 of 9 swedish dissertations containing the words continuum design sensitivity.

  2. 1. Continuum sensitivity based shape and material optimization for microwave applications

    Author : Yongtao Yang; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; gradient method; adjoint problem; optimization; radar cross section; continuum design sensitivity;

    Abstract : .... READ MORE

  4. 2. On Methods for Discrete Topology Optimization of Continuum Structures

    Author : Mats Werme; Krister Svanberg; Wolfgang Achtziger; KTH; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Topology optimization; Stress constraints; Sensitivity calculations; Neighbourhood search methods; Sequential integer programming; Optimization; systems theory; Optimeringslära; systemteori;

    Abstract : This thesis consists of an introduction and seven appended papers. The purpose of the introduction is to give an overview of the field of topology optimization of discretized load carrying continuum structures. READ MORE

  5. 3. Shape Optimization for Electromagnetic and Quasimagnetostatic Applications

    Author : Per Jacobsson; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; shape optimization; continuum sensitivity; electromagnetic scattering; adjoint problem;

    Abstract : This thesis uses a continuum formulation of sensitivity for shape optimization in two-dimensional microwave scattering and quasimagnetostatic problems. The continuum sensitivity is obtained by solving an appropriate adjoint problem. READ MORE

  6. 4. Shape and material optimization for antenna applications

    Author : Per Jacobsson; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; explicit-implicit time stepping; sensitivity analysis; Nitsche s method; total scattering cross section; shape and material optimization; array antennas; finite element method;

    Abstract : In this thesis, a gradient-based method for shape and material optimization fortwo antenna applications is presented: minimization of the active reflectioncoefficient for conformal array antennas; and minimization of the totalscattering cross section for cylindrical scatterers. The sensitivity of theobjective function with respect to changes of the shape and material of the geometry isexpressed in terms of the original field problem and an adjoint field problem. READ MORE

  7. 5. Block stability analysis using deterministic and probabilistic methods

    Author : Mehdi Bagheri; Håkan Stille; Charlie C. Li; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Block stability analysis; Model uncertainty; Joint relaxation; Partial factor; Sensitivity analysis;

    Abstract : This thesis presents a discussion of design tools for analysing block stability around a tunnel. First, it was determined that joint length and field stress have a significant influence on estimating block stability. READ MORE