Search for dissertations about: "waveguide finite elements"

Showing result 1 - 5 of 12 swedish dissertations containing the words waveguide finite elements.

  2. 1. Waveguide Finite Elements Applied on a Car Tyre

    Author : Carl-Magnus Nilsson; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; wave equation; wave solution; waveguide; finite element; spectral finite element; tyre noise; tyre vibration; input power; shells; pre stress; fluid shell coupling; axi--symmetric;

    Abstract : Structures acting as waveguides are quite common withexamples being, construction beams, fluid filled pipes, railsand extruded aluminium profiles. Curved structures like cartyres and pipe-bends may also be considered as waveguides. Wavesolutions in such structures may be found by a method calledthe Waveguide Finite Element Method or WFEM. READ MORE

  4. 2. Numerical methods for waveguide modelling

    Author : Christer Johansson; Björn Engquist; Per Lötstedt; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Waveguide; finite element; hp-adaptivity; helmholtz; maxwell; Numerical analysis; Numerisk analys;

    Abstract : Waveguides are used to transmit electromagnetic signals. Their geometry is typically long and slender. This particular shape can be used in the design of efficient computational methods. Only special modes are transmitted and eigenvalue and eigenvector analysis becomes important. READ MORE

  5. 3. Waveguide finite elements for thin-walled structures

    Author : Carl-Magnus Nilsson; KTH; []
    Keywords : ;

    Abstract : .... READ MORE

  6. 4. Direct and Inverse Methods for Waveguides and Scattering Problems in the Time Domain

    Author : Erik Abenius; Per Lötstedt; Mats Gustafsson; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Maxwell s equations; time-domain; FDTD; finite-element; hybrid; thin sheet; waveguide; PML; inverse scattering; adjoint; gradient-based; minimization; Beräkningsvetenskap med inriktning mot numerisk analys; Scientific Computing with specialization in Numerical Analysis;

    Abstract : Numerical simulation is an important tool in understanding the electromagnetic field and how it interacts with the environment. Different topics for time-domain finite-difference (FDTD) and finite-element (FETD) methods for Maxwell's equations are treated in this thesis. READ MORE

  7. 5. Two components for an imaging receiver

    Author : Guillermo F. Delgado Gunckel; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; broadband waveguide probe; Quasi-optical; SIS; finite elements; nipi MQW; opto-electronic modulator; fourier transform spectrometer; scale model;

    Abstract : .... READ MORE