Avancerad sökning

Hittade 4 avhandlingar som matchar ovanstående sökkriterier.

1. 1. A study of hierarchical FE solutions of Biot's equations for acoustic modeing of poroelastic medial

   Författare :Nils-Erik Hörlin; KTH; []
   Nyckelord :FEM; Hierarchical finite element; p-version finite element; Porous materials; Poroelastic material; Biot s equations; Noise and vibration control; Solid displacement - fluid displacement; Convergence;

   Sammanfattning : .... LÄS MER

3. 2. Hierarchical finite element modelling of Biot's equations for vibro-acoustic modelling of layered poroelastic media

   Författare :Nils-Erik Hörlin; Peter Göransson; Frank Ihlenburg; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Engineering physics; finite element; hierarchical; Biot; porous material; vibro-acoustic; Teknisk fysik; Engineering physics; Teknisk fysik;

   Sammanfattning : This thesis concerns three-dimensional finite element modelling of Biot's equations for elasto-acoustic modelling of wave propagation in layered media including porous elastic materials. The concept of hierarchical (p-version) finite elements are combined with various weak forms of Biot's equations. LÄS MER

4. 3. Procedures in Adaptive Finite Element Analysis

   Författare :Peter Möller; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

   Sammanfattning : The present work is concerned with topics related to some adaptive methods for the approximate solution of differential equations. Emphasis is on the finite element method for second order elliptic equations, where we use either p-refinement or remeshing with an advancing front mesh generator in order to improve approximate solutions. LÄS MER

5. 4. Numerical Complexity Analysis of Weak Approximation of Stochastic Differential Equations

   Författare :Raul Tempone Olariaga; KTH; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Adaptive methods; a posteriori error estimates; stochastic differential equations; weak approximation; Monte Carlo methods; Malliavin Calculus; HJM model; option price; bond market; stochastic elliptic equation; Karhunen-Loeve expansion; numerical co; Numerical analysis; Numerisk analys;

   Sammanfattning : The thesis consists of four papers on numerical complexityanalysis of weak approximation of ordinary and partialstochastic differential equations, including illustrativenumerical examples. Here by numerical complexity we mean thecomputational work needed by a numerical method to solve aproblem with a given accuracy. LÄS MER