Results 11 to 20 of about 1,717 (189)

A STUDY ON EFFICIENCY OF PERFECTLY MATCHED LAYER (PML) FOR SEISMIC SOIL-STRUCTURE INTERACTION

open access: yesUludağ University Journal of The Faculty of Engineering, 2022
Direkt yöntem, zemin-yapı etkileşimi (SSI) analizlerinde kullanılan bir sonlu eleman yaklaşımıdır. Bu yöntemin temel varsayımı, sonsuz zemin ortamının, farklı sınır koşulları uygulanarak sınırlandırılmış zemin ortamına dönüştürülmesidir. Bu çalışmanın amacı, SSI analizi için Mükemmel Eşleşen Katmanların (PML) etkinliğini incelemektir.
GENÇ, Abdulkadir   +2 more
openaire   +2 more sources

The perfectly matched layer (PML) for hyperbolic wave propagation problems: A review

open access: yes, 2022
It is well-known that reliable and efficient domain truncation is crucial to accurate numerical solution of most wave propagation problems. The perfectly matched layer (PML) is a method which, when stable, can provide a domain truncation scheme which is convergent with increasing layer width/damping.
Duru, Kenneth, Kreiss, Gunilla
openaire   +2 more sources

Computationally Efficient Locally One-Dimensional Algorithm for Open Region Ground Penetrating Radar Problem With Improved Absorption

open access: yesIEEE Access, 2021
By incorporating higher order formulation with perfectly matched layer (PML) implementation, unconditionally stable computationally efficient locally one-dimensional (LOD) algorithm with improved absorption is proposed for simulating ground penetrating ...
Peiyu Wu   +4 more
doaj   +1 more source

Auxiliary differential equation (ADE) implementation of complex-frequency shifted perfectly matched layer (CFS-PML) [PDF]

open access: yesAdvances in Intelligent Systems Research, 2015
In this paper, an efficient auxiliary differential equation (ADE) method is proposed to implement stretched-coordinate perfectly matched layer (SC-PML) in finite-difference time-domain (FDTD). The derivation of discrete difference operators for the ADE-PML equation for FDTD is also presented.
Yunpeng Ma, Peilin Huang, Jinzu Ji
openaire   +1 more source

Compact Matrix-Exponential-Based FDTD with Second-Order PML and Direct Z-Transform for Modeling Complex Subsurface Sensing and Imaging Problems

open access: yesRemote Sensing, 2020
To simulate complex subsurface sensing and imaging problems with both propagating and evanescent waves by the finite-difference time-domain (FDTD) method, the highly-accurate second-order perfectly matched layer (SO-PML) formulations based on the direct ...
Naixing Feng   +4 more
doaj   +1 more source

Complex Envelope Approximate Crank-Nicolson Method and Its Open Boundary Implementation for Bandpass Problem

open access: yesIEEE Access, 2021
To efficiently simulate the bandpass electromagnetic problems by employing the finite-difference time-domain (FDTD) algorithm, unconditionally stable implementation is proposed based upon the complex envelope method and the Crank-Nicolson Direct ...
Shihong Wu   +4 more
doaj   +1 more source

Notes on Perfectly Matched Layers (PMLs)

open access: yes, 2021
This note is intended as a brief introduction to the theory and practice of perfectly matched layer (PML) absorbing boundaries for wave equations, originally developed for MIT courses 18.369 and 18.336. It focuses on the complex stretched-coordinate viewpoint, and also discusses the limitations of PML.
openaire   +2 more sources

One-Step Crank-Nicolson Direct-Splitting Algorithm with Enhanced Absorption to Evaluate Low-Pressure Discharge for Satellite Sensors in Outer Space

open access: yesSensors, 2023
Low-pressure discharge causes air ionization resulting in performance degeneration or failure for the satellite sensors in outer space. Here, a one-step Crank-Nicolson Direct-Splitting (CNDS) algorithm is proposed to evaluate the electrical behavior of ...
Yangjing Wang   +4 more
doaj   +1 more source

PERFECTLY MATCHED LAYER (PML) FOR TRANSIENT WAVE PROPAGATION IN A MOVING FRAME OF REFERENCE [PDF]

open access: yesProceedings of the 4th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering (COMPDYN 2013), 2014
In relation to the development of a Rolling Wheel Deflectomet er (RWD), which is a non-destructive testing device for measuring pavementdeflections, a finite element model for obtaining the soil/pavement response is developed. Abs orbing boundary conditions are necessary in order to prevent reflections of the waves propaga ting through the soil due to ...
S. Madsen, S. Krenk, O. Hededal
openaire   +1 more source

A simple structure of PCF based sensor for sensing sulfur dioxide gas with high sensitivity and better birefringence

open access: yesSensors International, 2021
This paper describes a micro-cored photonic crystal fiber-based gas sensor that uses a simple structure and proper analysis has done to detect sulfur dioxide gas.
Md Jayed Bin Murshed Leon   +1 more
doaj   +1 more source

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