Search results for: NUMERICAL MODELLING

• INTERNATIONAL JOURNAL OF NUMERICAL MODELLING-ELECTRONIC NETWORKS DEVICES AND FIELDS

  Journals

  ISSN: 0894-3370 , eISSN: 1099-1204

• Numerical Modelling of Structures with Uncertainties

  Publication

  • M. Kahsin

  - Polish Maritime Research - Year 2017

  The nature of environmental interactions, as well as large dimensions and complex structure of marine offshore objects, make designing, building and operation of these objects a great challenge. This is the reason why a vast majority of investment cases of this type include structural analysis, performed using scaled laboratory models and complemented by extended computer simulations. The present paper focuses on FEM modelling...

  Full text available to download

• Numerical modelling of DMT test in calibration chamber

  Publication

  • L. Bałachowski

  - Studia Geotechnica et Mechanica - Year 2006

  Analiza numeryczna badania DMT wykonanego w komorze kalibracyjnej w Katedrze Geotechniki Politechniki Gdańskiej. Badania przeprowadzono w piasku Lubiatowo średnio zagęszczonym i zagęszczonym przy składowej pionowej naprężenia 100 kPa. Modelowano proces wciskania ostrza dylatometru oraz fazę odkształcenia membrany. Analiza parametryczna uwzględnia wpływ wartości kąta tarcia wewnętrznego i dylatancji oraz modułu odkształcenia uzyskanych...

• Numerical modelling of 3D printout using line (1D) elements

  Publication

  • K. Bobrowski
  • W. Wojnicz
  • K. Lipiński

  - Year 2017

  A proposition of some numerical modelling of the 3D printout is presented in the paper. The proposed model is composed of some 1D elements. The resulting numerical model of the infill consist of beam, spring and rigid elements. Obtained results confirm correctness of the proposed modelling method. Two methods of estimation of the spring parameters are proposed in the paper. In the first method, mechanical properties of the connecting...

• Numerical Modelling of Connections Between Stones in Foundations of Historical Buildings

  Publication

  • J. Przewłócki
  • M. Zielińska
  • K. Grębowski

  - IOP Conference Series: Earth and Environmental Science - Year 2017

  The aim of this paper is to analyse the behaviour of old building foundations composed of stones (the main load-bearing elements) and mortar, based on numerical analysis. Some basic aspects of historical foundations are briefly discussed, with an emphasis on their development, techniques, and material. The behaviour of a foundation subjected to the loads transmitted from the upper parts of the structure is described...

  Full text available to download

• Numerical modelling and experimental verification of compressible squeeze film pressure

  Publication

  • T. Stolarski

  - TRIBOLOGY INTERNATIONAL - Year 2010

  The validity of using the Reynolds equation for compressible squeeze film pressure was tested with computational fluid dynamics (CFD). A squeeze film air bearing was instrumented with pressure sensors and non-contacting displacement probes to provide transient measurements of film thickness and pressure. The film thickness measurements also provided input parameters to the numerical prediction. However, numerical results showed...

  Full text to download in external service

• Numerical modelling of thermodynamics and dynamics of sea ice in the Baltic Sea

  Publication

  • A. Herman
  • J. Jedrasik
  • M. Kowalewski
  • A. Herman
  • M. Kowalewski

  - Ocean Science - Year 2011

  Full text to download in external service

• Numerical modelling of conical wave formation in multimode optical fibers

  Publication

  • S. Majchrowska
  • K. Tarnowski
  • P. Bejót
  • B. Kibler

  - Year 2021

  Full text to download in external service

• Numerical modelling of elasto-viscoplastic Bodner-Partom constitutive equations

  Publication

  • A. Ambroziak

  - Year 2005

  Artykuł omawia wykorzystanie specjalnej procedury UVSCPL umożliwiającej wprowadzenie do komercyjnego programu MSC.Marc sprężysto-lepkoplastycznych równań modelu Bodnera-Partoma. Prezentuje szereg przykładów statycznych i dynamicznych, które potwierdzają poprawność zaproponowanej koncepcji analizy konstrukcji z wykorzystaniem rozpatrywanego prawa Bodnera-Partoma.

• NUMERICAL MODELLING AND EXPERIMENTATION OF HISTORICAL CARPENTRY CORNER LOG JOINTS

  Publication

  • A. Pestka
  • K. Szepietowska
  • P. Kłosowski
  • M. Krajewski
  • I. Lubowiecka

  - Year 2018

  The main purpose of this research is to determine the stress distributions on the contact surfaces between the logs of the historical carpentry corner joints. The additional purpose is to compare the stress distribution for four different boundary conditions in the case of dry and wet pine wood. The paper presents the results of numerical analysis of the shortcorner dovetail connection and the saddle notch corner joint, which are...

  Full text to download in external service

• Comparative study of numerical modelling and experimental investigation for vessel-docking operations

  Publication

  • X. Wen
  • J. Zhang
  • M. C. Ong
  • A. Kniat

  - MARINE STRUCTURES - Year 2024

  A comparative study between numerical modelling and experimental investigation is performed to validate the developed numerical method for simulating floating dock operations with a vessel on board. Both model-scale and full-scale experimental tests are performed on floating docks with a vessel on board, and the draughts using draught meters, floating positions and bending of the floating dock are measured. The present numerical...

  Full text available to download

• The statistical impact of experimental result scatter of asphalt mixtures on their numerical modelling

  Publication

  • C. Szydłowski
  • J. Górski
  • M. Stienss
  • Ł. Smakosz

  - MATEC Web of Conferences - Year 2019

  The paper presents selected test results of asphalt mixture conducted in low temperatures. The obtained parameters are highly diverse. It concerns ultimate breaking loads, stiffness parameters related to Young's modulus but also the fracture course. Statistical analysis upon the results makes it possible to relevantly estimate the material-defining parameter values. Such a random approach leads to the mean values of breaking and...

  Full text available to download

• Numerical Modelling of Forced Convection of Nanofluids in Smooth, Round Tubes: A Review

  Publication

  • J. Cieśliński

  - ENERGIES - Year 2022

  A comprehensive review of published works dealing with numerical modelling of forced convection heat transfer and hydrodynamics of nanofluids is presented. Due to the extensive literature, the review is limited to straight, smooth, circular tubes, as this is the basic geometry in shell-and-tube exchangers. Works on numerical modelling of forced convection in tubes are presented chronologically in the first part of the article....

  Full text available to download

• A novel heterogeneous model of concrete for numerical modelling of ground penetrating radar

  Publication

  • J. Lachowicz
  • M. Rucka

  - CONSTRUCTION AND BUILDING MATERIALS - Year 2019

  The ground penetrating radar (GPR) method has increasingly been applied in the non-destructive testing of reinforced concrete structures. The most common approach to the modelling of radar waves is to consider concrete as a homogeneous material. This paper proposes a novel, heterogeneous, numerical model of concrete for exhaustive interpretation of GPR data. An algorithm for determining the substitute values of the material constants...

  Full text available to download

• Numerical modelling of water transport processes in partially-connected tidal basins

  Publication

  • A. Herman

  - COASTAL ENGINEERING - Year 2007

  Full text to download in external service

• Numerical modelling of elasto-viscoplastic Chaboche constitutive equations using MSC.Marc.

  Publication

  • A. Ambroziak

  - Year 2005

  Artykuł omawia wykorzystanie specjalnej procedury UVSCPL umożliwiającej wprowadzenie do komercyjnego programu MSC.Marc sprężysto-lepkoplastycznych równań modelu Chaboche'a. Prezentuje szereg przykładów numerycznych, które potwierdzają poprawność zaproponowanej koncepcji analizy konstrukcji z wykorzystaniem rozpatrywanego prawa Chaboche'a ze zniszczeniem.

• Numerical modelling of moored floating structures using SPH. Preliminary results

  Publication

  • P. Dymarski

  - Year 2012

  This article presents partial results of the works carried out under the research project "The development of the methodof modeling the dynamics of the floating (offshore) objects subjected to the environment influence", which aims at developing computational methods for modeling the dynamics of offshore structures.The article contains the description of the method of modeling the hydrodynamic impacts using SPH method and the description...

• The Influence of Selected Parameters of Numerical Modelling on Strains and Stresses at Weld Toe Notch

  Publication

  • K. Niklas
  • J. Kozak

  - Year 2015

  Latest development in the field of welding technology and prefabrication enabled massive production of thin-walled sandwich structures. Multi-layered sandwich structures are fabricated with the use of high-power CO2 lasers, friction welding, arc welding, hybrid welding, or other technique designed for the special purpose. Steel or aluminium alloy plates with thickness between 1 and 5 mm are connected by internal stiffeners. Strength...

• Advanced numerical modelling for predicting residual compressive strength of corroded stiffened plates

  Publication

  • K. Wołoszyk
  • Y. Garbatov

  - THIN-WALLED STRUCTURES - Year 2023

  An advanced methodology for predicting the residual compressive strength of corroded stiffened plates is developed here using the non-linear finite element method. The non-uniform loss of a plate thickness is accounted for on a macro-scale. In contrast, mechanical properties are changed using the constitutive model to reflect the corrosion degradation impact on a micro-scale. Three different stiffened plate thicknesses are considered,...

  Full text available to download

• Numerical modelling of asymetric double-layer Al-Cu plate rolling process

  Publication

  • D. Rydz
  • R. Skoblik

  - Advances in Materials Science - Year 2006

  Niekorzystnym zjawiskiem towarzyszącym procesom walcowania płaskich wyrobów bimetalowych jest krzywizna pasma na wyjściu z kotliny walcowniczej wynikająca z nierównomierności odkształcenia warstw bimetalowej blachy. Możliwość szybkiego i łatwego przeciwdziałania temu zjawisku daje wprowadzenie asymetrii prędkości bądź średnic walców roboczych. W przedstawionym artykule zaprezentowano badania komputerowe procesu walcowania blach...

  Full text to download in external service

• Turbulence model evaluation for numerical modelling of turbulent flow and heat transfer of nanofluids

  Publication

  • H. Boertz
  • A. Baars
  • J. Cieśliński
  • S. Smoleń

  - Applied Mechanics and Materials - Year 2016

  In this work, Nusselt number and friction factor are calculated numerically for turbulent pipe flow (Reynolds number between 6000 and 12000) with constant heat flux boundary condition using nanofluids. The nanofluid is modelled with the single-phase approach and the simulation results are compared with experimental data. Ethylene glycol and water, 60:40 EG/W mass ratio, as base fluid and SiO2 nanoparticles are used as nanofluid...

• Numerical modelling of the mesofracture process of sintered 316L steel under tension using microtomography

  Publication

  • M. Doroszko
  • A. Seweryn

  - ENGINEERING FRACTURE MECHANICS - Year 2021

  This paper concerns numerical modelling of the deformation process, taking into account the local fracture of porous 316L sinters at the mesoscopic scale using the finite element method. Calculations are performed with the use of geometrical models, to map the realistic shape of the porous mesostructure of the material, obtained by means of computed microtomography. The microtomographic device has limited and insufficient measurement...

  Full text available to download

• Numerical modelling and analysis of steel specimens subjected to marine immersed corrosion and tensile load

  Publication

  • K. Wołoszyk
  • Y. Garbatov

  - Year 2022

  The present study develops numerical models to analyse the behaviour of steel specimens subjected to marine immersed corrosion degradation and tensile load. The finite element method with the use of the explicit dynamic solver LS-DYNA, satisfying the quasi-static conditions, is employed. Two numerical models are developed, where in the first one, the scans of surfaces gathered from corroded plate specimens are implemented directly...

  Full text available to download

• Numerical Modelling of Shear Localization in Granular Bodies using MPM and Non-local Hypoplasticity

  Publication

  • J. Krzyżanowski
  • M. Wójcik
  • J. Tejchman

  - AIP Conference Proceedings - Year 2019

  The paper deals with modelling of shear localization in granular bodies by means of an enhanced hypoplastic constitutive model and material point method (MPM). The calculations were carried out for plane strain compression of non-cohesive sand. In order to properly capture the width and inclination of shear zones, the constitutive model was enriched by a characteristic length of micro-structure by means of a non-local theory....

  Full text available to download

• Physical and numerical modelling of heat-flow processes in tangentially pulverized fuel-fired boiler

  Publication

  • J. Barański
  • J. Stąsiek
  • W. Błasiak

  - TASK Quarterly - Year 2003

  Praca przedstawia wykorzystanie eksperymentalnego modelowania fizycznego kwasowo-zasadowego do modernizacji kotła pyłowego z tangencjalną komorą spalania w aspekcie ograniczenia emisji toksycznych składników węgla, siarki i azotu oraz doboru optymalnych parametrów termodynamicznych mieszania i spalania. Dodatkowo, w celu porównania wyników pomiarów kotła po modernizacji, wykonano obliczenia numeryczne z zastosowaniem oprogramowania...

  Full text available to download

• Physical and numerical modelling of flow pattern and combustion process in pulverized fuel fired boiler.

  Publication

  • J. Barański

  - Year 2002

  W pracy przedstawiono źródła powstawania toksycznych związków podczas procesu spalania, metody ich redukcji. Do tego zadania wykorzystano eksperymentalne modelowanie fizyczne i uzupełniono je modelowaniem numerycznym. Obie metody, techniki modelowania miały na celu optymalizację procesu spalania.Wyniki obliczeń numerycznych porównano z pomiarami.

• Numerical modelling of different airbag folding patterns and their influence on occupant responses in frontal vehicle impact

  Publication

  • Ł. Pachocki
  • H. Fang

  - INTERNATIONAL JOURNAL OF CRASHWORTHINESS - Year 2024

  This paper presented a procedure for airbag folding for the application in occupant safety studies and analysed the influence of different airbag folding patterns on the occupant severity in frontal impact. Airbags were folded in two patterns: zig-zag and top-roll, using two folding techniques: Initial Metric Method and Explicit Folding. The explicit folding was found to be more expensive in terms of preparation time. However,...

  Full text to download in external service

• Numerical Modelling for Prediction of Compression Index from Soil Index Properties in Jimma town, Ethiopia

  Publication

  • W. F. Kabeta
  • F. Fufa Fekadu
  • K. Feyissa Yerosan

  - U.Porto Journal of Engineering - Year 2022

  In this study, correlations are developed to predict compression index (Cc) from index parameters so that one can be able to model Jimma soils with compression index using simple laboratory tests. Undisturbed and disturbed soil samples from twelve different locations in Jimma town were collected. Laboratory tests like specific gravity, grain size analysis, Atterberg limit, and one-dimensional consolidation test for a total of twenty-four...

  Full text available to download

• Combining Satellite Imagery and Numerical Modelling to Study the Occurrence of Warm Upwellings in the Southern Baltic Sea in Winter

  Publication

  • H. Kowalewska-Kalkowska
  • M. Kowalewski

  - Remote Sensing - Year 2019

  Full text to download in external service

• Interaction Between Storm Water Conduit Flow and Overland Flow for Numerical Modelling of Urban Area Inundation

  Publication

  • J. Hakiel
  • M. Szydłowski

  - Year 2016

  Nowadays we can observe increasing frequency of inundations in cities. This makes accurate predicting of inundations more important than ever. Numerical modeling of this issue requires complex approach with simultaneous calculations of pipe flow and surface flow. In this paper, after a short review of known methods used for solving pipe and surface flow, we will try to answer the question if presented methods would be sufficiently...

  Full text to download in external service

• Numerical FDM modelling of wave propagation in concrete structure

  Publication

  • B. Zima
  • R. Kędra

  - Prace Studentów Politechniki Wrocławskiej. Seria : Konferencje - Year 2015

  The article presents application of finite difference method to damage detection and its size evaluation in concrete structure by elastic wave propagation method. The simulations of wave propagation in concrete structure were performed for six different damage scenarios. Damages were modelled as areas with changed material properties. Investigation focused on the influence of damage size on the energy of wave reflection. Presented...

• RUSSIAN JOURNAL OF NUMERICAL ANALYSIS AND MATHEMATICAL MODELLING

  Journals

  ISSN: 0927-6467 , eISSN: 1569-3988

• Modelling and Measurement of Folk Guitar: Truss Rod and Strings in Numerical Analysis of Tone

  Publication

  • P. Bielski
  • M. Kujawa
  • I. Lubowiecka

  - Archives of Acoustics - Year 2019

  The study makes an attempt to model a complete vibrating guitar including its non-linear features, specifically the tension-compression of truss rod and tension of strings. The purpose of such a model is to examine the influence of design parameters on tone. Most experimental studies are flawed by uncertainties introduced by materials and assembly of an instrument. Since numerical modelling of instruments allows for deterministic...

  Full text available to download

• Modelling of wave propagation in spatial frame elements - numerical simulations and experimental works

  Publication

  • J. Chróścielewski
  • M. Rucka
  • K. Wilde
  • W. Witkowski

  - Year 2008

  W pracy porównano rozwiązania propagacji fal sprężystych w ośrodku typu belka Timoszenki, uzyskane na drodze eksperymentalnej i numerycznej. Do obliczeń numerycznych wykorzystano wielowęzłowe spektralne elementy skończone klasy C0.Omówiono algorytm całkowania po czasie i sformułowano wnioski dotyczące liczby węzłów na długość fali.

• Membrane shell finite element for textile fabric modelling numerical and experimental aspects

  Publication

  • P. Kłosowski

  - Year 2008

  W pracy omówiono podstawowe problem numeryczne pojawiające się przy projektowaniu przekryć z tkanin technicznych. Przedstawiono eksperymenty potrzebne do identyfikacji właściwości mechanicznych takich tkanin.

• Constitutive Modelling of Knitted Abdominal Implants in Numerical Simulations of Repaired Hernia Mechanics

  Publication

  • A. Tomaszewska
  • D. Reznikov
  • C. K. Szymczak
  • I. Lubowiecka

  - Year 2020

  The paper presents a numerical approach to describe mechanical behavior of anisotropic textile material, which is a selected abdominal prosthesis. Two constitutive nonlinear concepts are compared. In the first one the material is considered composed from two families of threads (dense net model) and in the second one the material is homogeneous but anisotropic (as proposed by Gassel, Ogden, Holzapfel). Parameters of both models...

  Full text available to download

• ESAIM: Mathematical Modelling and Numerical Analysis

  Journals

  ISSN: 2822-7840 , eISSN: 2804-7214

• FEM-based wave propagation modelling for SHM: Certain numerical issues in 1D structures

  Publication

  • M. Palacz
  • A. Żak
  • M. Krawczuk

  - Materials - Year 2020

  The numerical modelling of structural elements is an important aspect of modern diagnostic systems. However, the process of numerical implementation requires advanced levels of consideration of multiple aspects. Important issues of that process are the positive and negative aspects of solution applied methods. Therefore the aim of this article is to familiarise the reader with the most important aspects related to the process of...

  Full text available to download

• Certain numerical issues of wave propagation modelling in rods by the Spectral Finite Element Method

  Publication

  • A. Żak
  • M. Krawczuk

  - FINITE ELEMENTS IN ANALYSIS AND DESIGN - Year 2011

  W pracy omówiony zagadnienia związane z modelowaniem propagacji fal sprężystych metodą Spektralnych Elementów Skończonych. Przedstawiono wpływ postaci macierzy mas na błędy rozwiązania. Omówiono zakres stosowalności modeli.

  Full text to download in external service

• Numerical Modelling in flow systems design_W/S_Energetyka_sem6_lato 23/24_PG_00042087

  e-Learning Courses

  • T. Muszyński

  Przedstawienie podstaw modelowania komputerowego procesów mających zastosowanie w technice cieplnej tak aby słuchacz był w stanie zrozumieć i zinterpretować wyniki otrzymane przy pomocy kodów obliczeniowych

• Numeryczne modelowanie prędkości płynięcia warstw blachy bimetalowej w procesie walcowania = The numerical modelling of the layers flow velocity in bimetal plates rolling proces

  Publication

  • D. Rydz
  • G. Stradomski
  • R. Skoblik

  - Year 2009

  W pracy przedstawiono wyniki obliczeń numerycznych dotyczących procesu asymetrycznego walcowania blach bimetalowych 18G2A+1H13.

• ESAIM-MATHEMATICAL MODELLING AND NUMERICAL ANALYSIS-MODELISATION MATHEMATIQUE ET ANALYSE NUMERIQUE

  Journals

  ISSN: 0764-583X , eISSN: 1290-3841

• The effect of numerical 2D and 3D FEM element modelling on strain and stress distributions at laser weld notches in steel sandwich type panels

  Publication

  • K. Niklas
  • J. Kozak

  - Polish Maritime Research - Year 2018

  Like other means of transport, merchant ships face the problem of increasing requirements concerning the environment protection, which, among other issues, implies the reduction of fuel consumption by the ship. Here, the conventional approach which consists in making use of higher strength steels to decrease the mass of the ship hull can be complemented by the use of new steel structures of sandwich panel type. However, the lack...

  Full text available to download

• New Concept of Numerical Ship Motion Modelling for Total Ship Operability Analysis by Integrating Ship and Environment Under One Overall System

  Publication

  • H. Olszewski
  • M. H. Ghaemi

  - Polish Maritime Research - Year 2018

  The paper presents a new concept of overall ship motion modelling for application to total ship operability. The delivered model is a multi-phase and includes both submerged part of ship’s hull and the surrounding water as a unique body. The Discrete Finite Element Method is applied. The model is successfully examined and illustrated for a selected AHTS.

  Full text available to download

• Mathematical and numerical modelling, L, IDE, sem. 01, summer 21/22,(M:00057379)

  e-Learning Courses

  • K. J. Kaliński

  Modelling. Optimal control. Modal analysis. High speed milling. Mechatronic design.

• Mathematical and Numerical Modelling, L, IDE IInd, sem.01, summer, 2022/23(00057379)

  e-Learning Courses

  • K. J. Kaliński

  Modelling of controlled mechanical systems by the mixed method of rigid and flexible finite elements: The finite element volume problems. Dynamics of multibody systems. Modelling of stationary closed loop systems. Modelling of systems whose configuration changes with time. Modelling of nonlinear controlled systems. Optimal control at energy performance index: Control of continuous nonstationary systems in domain of generalised...

• Mathematical and numerical modelling,W,IDE-EMSS,IIst,sem.01,lato,2023/24 (PG_00057379)

  e-Learning Courses

  • K. J. Kaliński

  Modelling of controlled mechanical systems by the mixed method of rigid and flexible finite elements: The finite element volume problems. Dynamics of multibody systems. Modelling of stationary closed loop systems. Modelling of systems whose configuration changes with time. Modelling of nonlinear controlled systems. Optimal control at energy performance index: Control of continuous nonstationary systems in domain of generalised...

• Numerical Modelling in flow systems design , W/L ,Energetyka. sem 6, lato 22/23 PG_00042087

  e-Learning Courses

• Mathematical and numerical modelling, P, IDE+EMSS, sem. 01, letni 23/24, stacjonarne, II stopień, (PG_00057379)

  e-Learning Courses

  • G. Banaszek

  Opanowanie wiedzy i umiejętności dotyczących tworzenia oraz rozwiązywania modeli obliczeniowych wybranych układów mechanicznych.  

• International Journal of Mathematical Modelling and Numerical Optimisation

  Journals

  ISSN: 2040-3607