Temat: numerical analysis - Prolib Integro

Skocz do pozycji: 1.

Tytuł:: Podstawowe pojęcia analizy błędów w metodach numerycznych algebry liniowej
Autorzy:: Kiełbasiński, A.
Tematy:: Numerical analysis; Pokaż więcej
Wydawca:: Polskie Towarzystwo Matematyczne
Powiązania:: https://bibliotekanauki.pl/articles/748130.pdf Link otwiera się w nowym oknie
Opis:: .
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Optimization of I-section profile design by the finite element method
Autorzy:: Różyło, P.
Tematy:: Abaqus
optimization
numerical analysis; Pokaż więcej
Wydawca:: Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Powiązania:: https://bibliotekanauki.pl/articles/103286.pdf Link otwiera się w nowym oknie
Opis:: This paper discusses the problem of design optimization for an I-section profile. The optimization process was performed using the Abaqus program. The numerical analysis of a strictly static problem was based on the finite element method. The scope of the analysis involved both determination of stresses and displacements in the profile and structure topology optimization. The main focus of the numerical analysis was put on reducing profile volume while maintaining the same load and similar stresses prior to and after optimization. The solution of the optimization problem is just an example of the potential of using this method in combination with the finite element method in the Abaqus environment. Nowadays numerical analysis is the most effective cost-reducing alternative to experimental tests and it enables structure examination by means of a computer.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: The accumulation and heat transfer in soils
Autorzy:: Kapjor, A.
Daniel, L.
Farbak, M.
Gottwald, M.
Tematy:: heat accumulation
numerical analysis; Pokaż więcej
Wydawca:: Politechnika Świętokrzyska w Kielcach. Wydawnictwo PŚw
Powiązania:: https://bibliotekanauki.pl/articles/402442.pdf Link otwiera się w nowym oknie
Opis:: The paper is focused on the investigation of the 240 hours cycle of heat charging and spontanneous discharging in the soil/water environment with 12-hour charging and 12-hour non-charging (discharging) cycles. The temperature fields at different times of running the simulation have been presented. It can be consluded that generally defined semi-insulated soil environment has a potential for withholding substantial heat cumulatively over repeated heating cycles.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: The solution of the first interior Fouriers problem with application of spline functions
Autorzy:: Jabłoński, Zdzisław
Tematy:: Integral equations, Numerical analysis; Pokaż więcej
Wydawca:: Polskie Towarzystwo Matematyczne
Powiązania:: https://bibliotekanauki.pl/articles/748265.pdf Link otwiera się w nowym oknie
Opis:: .
Volterra's integral equation (which arises from the first interior Fourier's problem) by spline functions of the cubic polinomials. Namely, the approximate solution of this equation is represented in the form of linear combination of spline functions, which are forming the distributions of unity within the segments [0, 2] and [0,t] respectively. The error of approximation we associate on natural way with perfectin of considered distributions of unity. The estimation of the error is given at the end of the paper.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Numerical analysis of parametric circuits
Autorzy:: Lipiński, W.
Tematy:: numerical analysis
PSpice program
mathcad; Pokaż więcej
Wydawca:: Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej
Powiązania:: https://bibliotekanauki.pl/articles/97187.pdf Link otwiera się w nowym oknie
Opis:: The purpose of the paper is to present numerical calculations for circuits with switched capacitors and inductances. Computer simulations have been carried out for an exemplary circuit using PSpice software. Then the analysis has been performed for the circuit according to the numerical algorithm.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Period doubling in the Rössler system : a computer assisted proof
Autorzy:: Zgliczyński, Piotr
Wilczak, Daniel
Dostawca treści:: Repozytorium Uniwersytetu Jagiellońskiego

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Skocz do pozycji: 7.

Tytuł:: Influence of bedding and backfill soil type on deformation of buried sewage pipeline
Autorzy:: Grosel, S.
Pachnicz, M.
Różański, A.
Sobótka, M.
Stefaniuk, D.
Tematy:: numerical analysis
buried PE pipe; Pokaż więcej
Wydawca:: Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Powiązania:: https://bibliotekanauki.pl/articles/178571.pdf Link otwiera się w nowym oknie
Opis:: In the paper, the influence of different types of bedding and backfill soil surrounding underground sewage duct on its deformation was analysed. Impact of increased soil lateral pressure was examined by considering the construction of an embankment nearby the underground pipeline. Numerical computations of three different variants of bedding and backfill soil surrounding the pipe were carried out. Displacements and deformation of the pipe were calculated using the finite element method with adoption of elastic-perfectly plastic constitutive model of soil. Subsequent stages of the construction were taken into account. Shear strength reduction method was applied to evaluate the factor of safety of the entire system. Finally, the results and conclusions were depicted.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: Numerical analysis of the stress and displacement level caused by axial load P=15000 N in a car scissor jack BD-02B2
Autorzy:: Różyło, P.
Wysmulski, P
Tematy:: FEM
numerical analysis
scissor jack; Pokaż więcej
Wydawca:: Polskie Towarzystwo Promocji Wiedzy
Powiązania:: https://bibliotekanauki.pl/articles/117713.pdf Link otwiera się w nowym oknie
Opis:: The paper presents a numerical analysis of the stress levels occurring in the scissor jack BD-02B2. Model of scissor jack was prepared in an environ-ment Catia V5R20. A simplified geometry for numerical calculation imported into the program Abaqus 6.10, in which the analysis was performed. FEM analysis was performed for the case when the scissor jack was at maximum lift height. Level occurring stress were compared with respect to the yield strength and tensile strength. The study also shows the level of displacements occurring under maximum load of the system. The results of numerical calculations have provided the necessary information concerning the degree of effort of mechanism. With the FEM analysis it was possible to determine the critical zones in the scissor jack.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: Analysis of IED sidebar explosion influence on hull of light fighting vehicle
Autorzy:: Barnat, W.
Tematy:: blast
IED
protection
numerical analysis; Pokaż więcej
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Powiązania:: https://bibliotekanauki.pl/articles/245829.pdf Link otwiera się w nowym oknie
Opis:: This paper shows preliminary numerical analysis of impact of IED sidebar blast on the hull of the light fighting vehicle in order to meet the current standards. Numerical analysis was carried out using a 3-dimensional shell FE model of the vehicle. The problem of the modelling method and computer simulations required several specific features for applied material models, e.g. physical state, plasticity, crispness, hardness. All necessary material properties were taken from the available literature or they were based on the experimental tests carried out in the Department of Mechanics and Applied Computer Science at the Military University of Technology. The STANAG 4569 is a legal basis that regulates the level of ballistic protection for such vehicles. Companies producing that kind of armoured vehicles for army, constantly look for the best and the newest energy consuming materials to ensure appropriate protection of the vehicle and the crew inside it against the effect of IED blast. The connection between a detonation wave and a formed shrapnel shell after detonation of the IED is created depending on the mass and kind of the charge. It is caused by impulsive load on a side bar or the bottom of a light vehicle. Both, safety of people and equipment endurance, is compatible with main rules that are common in Polish Army and it will be common rule in future. It is the fact that motivates the research centres and the arms industry to develop a product using advance computation method to construct new energy absorbing construction which will increase safety of the crew in the armed vehicle.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: Numerical Analysis of Thermo-Mechanical Phenomena of the Progressive Hardening Elements Made of Tool Steel for Cold Work
Autorzy:: Domański, T.
Tematy:: hardening
strains
stresses
numerical analysis; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:: https://bibliotekanauki.pl/articles/352349.pdf Link otwiera się w nowym oknie
Opis:: The numerical algorithm of thermal phenomena is based on the solution of the heat conduction equations in Petrov-Galerkin’s formula using the finite element method. In the modeling of phase transformation in the solid state, the models based on the diagrams of continuous heating and continuous cooling (CHT and CCT). In the modeling of mechanical phenomena, equations of equilibrium and constitutive relationships were adopted in the rate form. It was assumed that the hardened material is elastic-plastic, and the plasticizing can be characterized by isotropic, kinematic or mixed strengthening. In the model of mechanical phenomena besides thermal, plastic and structural strains, the transformations plasticity was taken into account. Thermo-physical size occurring in the constitutive relationship, such as Young’s modulus and tangential modulus, while yield point depend on temperature and phase composition of the material. The modified Leblond model was used to determine transformation plasticity. This model was supplemented by an algorithm of modified plane strain state, advantageous in application to the modeling of mechanical phenomena in slender objects. The problem of thermoelasticity and plasticity was solved by the FEM. In order to evaluate the quality and usefulness of the presented numerical models, numerical analysis of temperature fields, phase fractions, stresses and strains was performed, i.e. the basic phenomena accompanying surface layer of progressive-hardening with a movable heat source of slender elements made of tool steel for cold work.
Dostawca treści:: Biblioteka Nauki

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