Essays about: "perfectly matched layers"

Found 5 essays containing the words perfectly matched layers.

  1. 1. Evaluation, adaption and implementations of Perfectly Matched Layers in COMSOL Multiphysics

    University essay from KTH/Numerisk analys, NA

    Author : Simon Erlandsson; [2020]
    Keywords : Applied mathematics; computational mathematics; finite element method; FEM; perfectly matched layer; PML; COMSOL; Tillämpad matematik; beräkningsteknik; finita elementmetoden; FEM; PML; COMSOL;

    Abstract : Perfectly matched layer (PML) is a commonly used method of absorbing waves at a computational boundary for partial differential equation (PDE) problems. In this thesis, methods for improving the usability of implementations in Comsol Multiphysics is addressed. READ MORE

  3. 2. Parametric Studies of Soil-Steel Composite Bridges for Dynamic Loads, a Frequency Domain Approach using 3D Finite Element Modelling

    University essay from KTH/Bro- och stålbyggnad

    Author : Jonathan Ljung; [2019]
    Keywords : dynamics; soil-steel composite bridges; corrugated steel plates; frequency response functions; frequency domain; perfectly matched layers; Comsol Multiphysics; parametric studies i;

    Abstract : In this thesis, parametric studies have been performed for a soil-steel compositebridge to determine and investigate the most influential parameters on the dynamicresponse.High-speed railways are currently being planned in Sweden by the Swedish TransportAdministration with train speeds up to 320 km/h. READ MORE

  4. 3. Finite Element and Dynamic Stiffness Analysis of Concrete Beam-Plate Junctions

    University essay from KTH/MWL Marcus Wallenberg Laboratoriet

    Author : Patrik Andersson; [2016]
    Keywords : Train-induced; vibrations; building; Finite Element Method; FEM; Dynamic Stiffness;

    Abstract : Measurements and predictions of railway-induced vibrations are becoming a necessity in today’s society where land scarcity causes buildings to be put close to railway traffic. The short distances mean an increased risk of the indoor vibration and noise disturbances experienced by residents. READ MORE

  5. 4. Applications of the perfectly matched layers in a discontinuous fluid media

    University essay from Institutionen för informationsteknologi

    Author : Ali Dorostkar; [2012]
    Keywords : ;

    Abstract : In this thesis we study the applications of the PML in a multi-layered media. The PML is constructed  for the scalar wave equation and the convergence and stability of the continuous problem is studied using the normal mode analysis. READ MORE

  6. 5. Three dimensional indoor electromagnetic wave propagation modeling using a hybrid method

    University essay from KTH/Elektroteknisk teori och konstruktion

    Author : Alberto Gonzalez Escudero; [2011]
    Keywords : ;

    Abstract : The objective of this project has been to develop a method to predict three dimensional indoor electromagnetic propagation.For this purpose, a hybrid method has been introduced, consisting in modeling the hallways as waveguides with Perfect Electric Conductor walls, and analyzing the propagation from a modal point of view. READ MORE