Search results for: NUMERICAL

• NUMERICAL ALGORITHMS

  Journals

  ISSN: 1017-1398 , eISSN: 1572-9265

• Communications in Nonlinear Science and Numerical Simulation

  Journals

  ISSN: 1007-5704 , eISSN: 1878-7274

• Numerical Analysis and Applications

  Journals

  ISSN: 1995-4239 , eISSN: 1995-4247

• APPLIED NUMERICAL MATHEMATICS

  Journals

  ISSN: 0168-9274 , eISSN: 1873-5460

• Journal of Numerical Mathematics

  Journals

  ISSN: 1570-2820 , eISSN: 1569-3953

• Journal of Numerical Cognition

  Journals

  eISSN: 2363-8761

• INTERNATIONAL JOURNAL FOR NUMERICAL AND ANALYTICAL METHODS IN GEOMECHANICS

  Journals

  ISSN: 0363-9061 , eISSN: 1096-9853

• Numerical testing of numerical generation efficiency in a bubble layer

  Publication

  • A. Baranowska

  - Year 2011

  Praca omawia zagadnienie nieliniowej propagacji w warstwie z pęcherzykami. Przedstawiono model matematyczny zjawiska. Omówiono problem wyznaczania prędkości fazowej, współczynnika tłumienia i częstotliwości rezonansowej pęcherzyków. Analizowano zmiany amplitud pierwszej i drugiej harmonicznych ciśnienia fali odbitej i bieżącej w funkcji grubości warstwy, względnej koncentracji pęcherzyków o różnych promieniach oraz częstotliwości...

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

  Journals

  ISSN: 0894-3370 , eISSN: 1099-1204

• INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN ENGINEERING

  Journals

  ISSN: 0029-5981 , eISSN: 1097-0207

• COMMUNICATIONS IN NUMERICAL METHODS IN ENGINEERING

  Journals

  ISSN: 1069-8299

• Journal of Numerical and Applied Mathematics

  Journals

  ISSN: 0868-6912

• ELECTRONIC TRANSACTIONS ON NUMERICAL ANALYSIS

  Journals

  ISSN: 1068-9613

• IMA JOURNAL OF NUMERICAL ANALYSIS

  Journals

  ISSN: 0272-4979 , eISSN: 1464-3642

• Numerical Algebra Control and Optimization

  Journals

  ISSN: 2155-3289 , eISSN: 2155-3297

• NUMERICAL FUNCTIONAL ANALYSIS AND OPTIMIZATION

  Journals

  ISSN: 0163-0563 , eISSN: 1532-2467

• Journal of Applied and Numerical Optimization

  Journals

  ISSN: 2562-5527 , eISSN: 2562-5535

• NUMERICAL LINEAR ALGEBRA WITH APPLICATIONS

  Journals

  ISSN: 1070-5325 , eISSN: 1099-1506

• SIAM JOURNAL ON NUMERICAL ANALYSIS

  Journals

  ISSN: 0036-1429 , eISSN: 1095-7170

• Combined numerical and experimental approach to determine numerical model of abdominal scaffold

  Publication

  • A. Tomaszewska
  • D. Reznikov

  - COMPUTER METHODS IN BIOMECHANICS AND BIOMEDICAL ENGINEERING - Year 2022

  A proper junction of the prosthesis and the abdominal wall is important in successful hernia repair. The number of tacks should be balanced to assure appropriate mesh fixation and not to induce post-operative pain. Numerical simulations help to find this balance. The study is aimed at creating a proper numerical model of a knitted surgical mesh subjected to boundary conditions and load occurring in the abdominal cavity. Continuous,...

  Full text available to download

• Footbridges, numerical aproach

  Publication

  • K. Żółtowski

  - Year 2009

  W artykule zamieszczono przegląd symulacji numerycznych kładek dla pieszych. Został on podzielony na trzy części(modele MES, obciążenie tłumem, odpowiedź mostu).

• Numerical Model of Femur Part

  Publication

  • W. Wojnicz
  • H. Olszewski
  • K. Lipiński
  • E. Wittbrodt

  - Year 2016

  The aim of the study is to create a new more accurate method of femur part modelling by using the finite element method. According to this new method, a femur part is treated as a complex structure composed of trabecular bone (internal part) and cortical bone (external part). The internal part is modelled as a scaffold, thus the external part is modelled as a coat (i.e. covering). Applying the programme ABAQUS, there were created...

• Numerical simulation of grouding experiment

  Publication

  • K. Niklas

  - Year 2010

  Jednym z możliwych sposobów zwiększenia odporności kon strukcji statku na kolizje jest zaprojektowania jej w taki sposób, aby podczas zderzenia absorbowała możliwie dużą ilość energii. Jednym z nowych pomysłów jest idea, będąca tematem projektu CORET (EUREKA E!3614), zwiększenia odporności na rozdarcie poszycia poprzez dodanie do obecnej konstrukcji półelastycznej polimerowo-betonowej bariery ochronnej. Proces projektowania nowej...

• 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

• Iranian Journal of Numerical Analysis and Optimization

  Journals

  ISSN: 2423-6977 , eISSN: 2423-6969

• NUMERICAL METHODS FOR PARTIAL DIFFERENTIAL EQUATIONS

  Journals

  ISSN: 0749-159X , eISSN: 1098-2426

• Numerical Mathematics-Theory Methods and Applications

  Journals

  ISSN: 1004-8979 , eISSN: 2079-7338

• International Journal of Numerical Analysis and Modeling

  Journals

  ISSN: 1705-5105

• Verification of geotechnical numerical simulations by model tests using PIV technique. Part II Numerical Simulation

  Publication

  • B. Zadroga
  • K. Malesiński
  • M. Cudny
  • K. Załęski

  - Architecture Civil Engineering Environment - Year 2011

  Przedstawiono zakres i wyniki symulacji numerycznych stateczności fundamentów bezpośrednich posadowionych w sąsiedztwie kątowych ścian oporowych. Wyniki symulacji numerycznych zweryfikowano na podstawie wyników badań modelowych z uwzględnieniem techniki PIV przedstawionych w części I niniejszego artykułu. W obliczeniach numerycznych wykorzystano trzy kryteria wytrzymałości gruntu na ścinanie: Coulomba - Mohra, Matsuoki - Nokaiego...

• Numerical and experimental propeller noise investigations

  Publication

  • S. Kowalczyk
  • J. Felicjancik

  - OCEAN ENGINEERING - Year 2016

  The standard propeller has been investigated in model scale, using medium size cavitation tunnel. The hydroacoustic characteristics of propellers under different loading conditions have been investigated. Additionally the presented experimental results have been used for the verification of applied numerical approach. During both numerical and experimental analyses non-uniform inflow propeller’s conditions have been adapted. Good...

  Full text to download in external service

• Numerical simulation of hardening of concrete plate

  Publication

  • A. Kuryłowicz-Cudowska
  • J. Chróścielewski
  • K. Wilde

  - Year 2018

  The paper presents a theoretical formulation of concrete curing in order to predict temperature evolution and strength development. The model of heat flow is based on a well-known Fourier equation. The numerical solution is implemented by means of the Finite Difference Method. In order to verify the model, the in situ temperature measurements at the top plate of a road bridge were carried out. A high agreement between numerical...

• Numerical crash analysis of the cable barrier

  Publication

  • K. Wilde
  • D. Bruski
  • S. Burzyński
  • J. Chróścielewski
  • W. Witkowski

  - Year 2017

  Safety barriers are used to increase road safety. Their basic task is to prevent the errant vehicle from getting off the road in places which are potentially dangerous for vehicle passengers. Barriers, which are used on European roads, must fulfill the requirements of EN 1317 standards by passing appropriate crash tests. Because of their high cost, numerical simulations are increasingly used to evaluate the properties of safety...

• Numerical analysis of a temporary steel grandstand

  Publication

  • N. Lasowicz
  • R. Jankowski

  - Year 2014

  The purpose of this paper is to present the results of the numerical analysis focused on the response of the temporary steel scaffolding grandstand subjected to human-induced vibrations due to jumping. Shell as well as beam elements have been used in the numerical model. Its first stage has involved conducting modal analysis in order to determine the modes of free vibrations and the corresponding natural frequencies for the empty...

• PROPELLER INVESTIGATIONS BY MEANS OF NUMERICAL SIMULATION

  Publication

  • J. Felicjancik

  - Year 2015

  The analyses of hydroacoustics are of high interest at the moment due to strong impact of hydroacoustic phenomena on marine environment; the noises, generated e.g. by marine traffic, may be harmful for sea life. The analyses presented here are focused on one of main sources of noises generated by ships, i.e. cavitating propeller. The goal of the work is the assessment of the cavitation phenomenon, carried out with the standard...

  Full text to download in external service

• numerical prediction of vortex generated by hydrofoil

  Publication

  • P. Flaszyński
  • J. Szantyr
  • P. Dymarski
  • M. Kraskowski

  - Year 2009

  W pracy przedstawiono wyniki obliczeń programami Fluent i Comet dla płata śruby napędowej. Pola prędkości oraz wirowość za płatem porównano z wynikami pomiarów (LDA- Laser Doppler Anemometry) w tunelu kawitacyjnym Centrum Techik Okrętowych (CTO). Przedstawiono wpływ adaptacji siatki wg różnych kryteriów (lokalnej wirowości lub prędkości) na zgodność wyników obliczeń z danymi eksperymentalnymi.

• Numerical and Experimental Study of Propeller Ventilation

  Publication

  • A. Kozłowska
  • K. Wockner
  • T. Rung
  • S. Steen
  • K. Koushan
  • S. Spencer

  - Year 2011

• Numerical and Experimental Study of Propeller Ventilation

  Publication

  • A. Kozlowska
  • K. Wockner
  • T. Rung
  • S. Steen
  • K. Koushan
  • S. Spence

  - Year 2011

• Is reduced integration just a numerical trick

  Publication

  • I. Kreja
  • Z. Cywiński

  - Computers & Structures - Year 1988

  Full text to download in external service

• Posttraumatic Orbital Emphysema: A Numerical Model

  Publication

  • A. Skorek
  • P. Kłosowski
  • Ł. Plichta
  • D. Raczyńska
  • M. A. Zmuda Trzebiatowski
  • P. Lemski

  - Journal of Ophthalmology - Year 2014

  Orbital emphysema is a common symptom accompanying orbital fracture. The pathomechanism is still not recognized and the usually assumed cause, elevated pressure in the upper airways connected with sneezing or coughing, does not always contribute to the occurrence of this type of fracture. Observations based on the finite model (simulating blowout type fracture) of the deformations of the inferior orbital wall after a strike in...

  Full text available to download

• Numerical determination of heat exchanger response

  Publication

  • A. Milewska

  - Year 2010

  Przedstawiono metodę przybliżonego obliczania temperatury płynu w ustalonym punkcie wymiennika ciepła i w ustalonej chwili. Wykorzystując nieklasyczny rachunek operatorów można wyznaczyć wzór na odpowiedź wymiennika ciepła, w którym występuje m.in. całka funkcji jednej zmiennej. Do obliczenia wartości całki dla ustalonych parametrów zastosowano wzory Newtona - Cotesa. Podano również oszacowanie błędu przybliżonego obliczania wartości...

  Full text to download in external service

• Numerical modeling of quantum dynamical processes

  Publication

  • J. Kozicki

  - Year 2023

  In this dissertation I present a high-precision (15, 18 or 33 decimal places) C++ implementation of quantum dynamics time propagation algorithms for both time-independent and time-dependent Hamiltonian with an inhomogeneous source term. Moreover I present an extension of both algorithms for time propagation to handle arbitrary number of coupled electronic levels. I have performed a careful validation of these implementations comparing...

  Full text available to download

• BIT NUMERICAL MATHEMATICS

  Journals

  ISSN: 0006-3835 , eISSN: 1572-9125

• Numerical Simulations for Transonic Flow in Control Valve

  Publication

  • P. Flaszyński
  • P. Doerffer
  • G. Mikułowski
  • J. holnicki-Szulc

  - Year 2013

  Results of numerical simulations for transonic flow in control valve are presented. The valve is the main part of an adaptive pneumatic shock absorber. Flow structure in the valve domain and the influence of the flow non-uniformity in the valve on a mass flow rate is investigated. Numerical simulation results are compared with experimental data.

• Numerical analysis of crack propagation in silicone nitride

  Publication

  • W. Karaszewski

  - Key Engineering Materials - Year 2012

  The properties of ceramics, specifically low density, high hardness, high temperature capability and low coefficient of thermal expansion are of most interest to rolling element manufacturers. The influence of ring crack size on rolling contact fatigue failure has been studied using numerical fracture analysis. Such cracks are very often found on ceramic bearing balls and decrease fatigue life rapidly. The numerical calculation...

• Numerical simulations of novel GFRP sandwich footbridge

  Publication

  • J. Chróścielewski
  • W. Witkowski
  • B. Sobczyk
  • K. Daszkiewicz

  - Year 2014

  In the following paper some aspects of numerical analysis and designing stages of a footbridge made of composite materials are elucidated. Because of the used materials the design process in this case is not ordinary and requires the development of concepts, material selections, identification of material properties, numerical simulations, strength calculations, serviceability and durability analyses. This contribution presents...

• Numerical simulation of laminate composite specimens failure

  Publication

  • B. Sobczyk

  - Year 2014

  This work presents some numerical results concerning simulation of failure of laminate composite specimens. In the article two tests to determine ultimate strength in an orthotropic layer, are considered: tension (TT1) and compression (TC1) test. The outcome is compared with experimental data provided by [9,10].

• Numerical solutions for blood flow in elastic vessels

  Publication

  • H. Leszczyński
  • A. Poliński
  • M. Wrzosek

  - MATHEMATICAL METHODS IN THE APPLIED SCIENCES - Year 2020

  We consider the differential–algebraic system for the blood flow and pressure in the systemic arteries. By the operator splitting method, we transform the system into the hyperbolic one, introduce the bicharacteristics, and perform the time–space nonuniform discretization, obtaining the innovative difference scheme. Our results are illustrated with numerical experiments.

  Full text to download in external service

• Experimental and Numerical Study on Pounding of Structures in Series

  Publication

  • S. El-Khoriby
  • A. Seleemah
  • H. Elwardany
  • R. Jankowski

  - Year 2015

  Pounding between structures in series during earthquakes may cause serious damage in the structural elements. The aim of this paper is to show the results of an experimental and numerical study that is focused on pounding between more than two structures which may be described as “structures in series”. In this study, the shaking table experiments, as well as the numerical analyses, were performed using three tower models including...

  Full text to download in external service

• Numerical methods for the assessment of bridge safety barriers

  Publication

  • K. Jamroz
  • S. Burzyński
  • W. Witkowski
  • K. Wilde
  • G. Bagiński

  - Year 2015

  The paper presents a numerical study of the bus crash test for bridge safety barriers. The analysis is conducted with the use of explicit code LS-DYNA. The problem of hourglass effect in shell elements is discussed. The simulations of bus impact against the barrier show that the analyzed barrier withstands the impact forces and restrains the bus trajectory to the bridge road.

  Full text to download in external service

• Prediction of Weld Deformations by Numerical Methods - Review

  Publication

  • J. Kozak

  - Polish Maritime Research - Year 2022

  The welding process is the basic technique of joining in the shipbuilding industry. This method generates welding distortions that cause a lot of problems during the manufacturing process due to both the time and cost of straightening as well as their influence on later stages of production. Proper preparation of welding processes plays a growing role in the shipbuilding industry and the development of calculating tools is being...

  Full text available to download