Autor: Guminiak, M. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: An initial stability of plates in various conservative load conditions by the Boundary Element Method
Autorzy:: Guminiak, M.
Powiązania:: https://bibliotekanauki.pl/articles/122698.pdf
Data publikacji:: 2015
Wydawca:: Politechnika Częstochowska. Wydawnictwo Politechniki Częstochowskiej
Tematy:: initial stability of plates
boundary element method
fundamental solutions
metoda elementów brzegowych
rozwiązania podstawowe
Opis:: An initial stability of Kirchhoff plates by the Boundary Element Method (BEM) is presented in the paper. A plate is subjected by external in-plane normal and tangential conservative loadings acting in two perpendicular directions. The Betti’s theorem is used to derive the boundary-domain integral equations. The direct version of the Boundary Element Method is presented with combination to simplified boundary conditions. The singular and non-singular approach of the boundary integrals derivation is used.
Źródło:: Journal of Applied Mathematics and Computational Mechanics; 2015, 14, 3; 25-36
2299-9965
Pojawia się w:: Journal of Applied Mathematics and Computational Mechanics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Simplified approach of free vibration analysis of plates supported in vicinity of the corners by BEM
Autorzy:: Guminiak, M.
Powiązania:: https://bibliotekanauki.pl/articles/122589.pdf
Data publikacji:: 2013
Wydawca:: Politechnika Częstochowska. Wydawnictwo Politechniki Częstochowskiej
Tematy:: free vibration
Kirchhoff plates
boundary element method
linear theory
thin plates
drgania swobodne
metoda elementów brzegowych
teoria liniowa
Opis:: Free vibration analysis of Kirchhoff plate by the Boundary Element Method is presented in the paper. The boundary integral equation are derived according to the Bettie theorem. The collocation version of BEM with non-singular approach with one and double collocation points is used. The constant type of element is introduced. Boundary suport at selected point is modelled as support in vicinity of point along single boundary element.
Źródło:: Journal of Applied Mathematics and Computational Mechanics; 2013, 12, 1; 45-54
2299-9965
Pojawia się w:: Journal of Applied Mathematics and Computational Mechanics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Non-linear vibration of Timoshenko beams by finite element method
Autorzy:: Rakowski, J.
Guminiak, M.
Powiązania:: https://bibliotekanauki.pl/articles/280035.pdf
Data publikacji:: 2015
Wydawca:: Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:: Timoshenko beams
non-linear vibrations
eigenvalue problem
finite elements
Opis:: The paper is concerned with free vibrations of geometrically non-linear elastic Timoshenko beams with immovable supports. The equations of motion are derived by applying the Hamilton principle. The approximate solutions are based on the negligence of longitudinal inertia forces but inclusion of longitudinal deformations. The Ritz method is used to determine non-linear modes and the associated non-linear natural frequencies depending on the vibration amplitude. The beam is discretized into linear elements with independent displacement fields. Consideration of the beams divided into the regular mesh enables one to express the equilibrium conditions for an arbitrary large number of elements in form of one difference equation. Owing to this, it is possible to obtain an analytical solution of the dynamic problem although it has been formulated by the finite element method. Some numerical results are given to show the effects of vibration amplitude, shear deformation, thickness ratio, rotary inertia, mass distribution and boundary conditions on the non-linear natural frequencies of discrete Timoshenko beams.
Źródło:: Journal of Theoretical and Applied Mechanics; 2015, 53, 3; 731-743
1429-2955
Pojawia się w:: Journal of Theoretical and Applied Mechanics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Static analysis of circular and elliptic plates resting on internal flexible supports by the Boundary Element Method
Autorzy:: Guminiak, M.
Szajek, K.
Powiązania:: https://bibliotekanauki.pl/articles/122852.pdf
Data publikacji:: 2014
Wydawca:: Politechnika Częstochowska. Wydawnictwo Politechniki Częstochowskiej
Tematy:: internally supported plates
boundary element method
fundamental solutions
curvilinear elements
metoda elementów brzegowych
rozwiązania podstawowe
elementy krzywoliniowe
Opis:: A static analysis of circular and elliptic Kirchhoff plates resting on internal elastic supports by the Boundary Element Method is presented in the paper. Elastic support has the character of Winkler-type elastic foundations. Bilateral and unilateral internal constraints are taken into consideration. The Betti’s theorem is used to derive the boundary domain integral equation. The direct version of the boundary element method is presented and simplified boundary conditions, including curvilinear boundary elements, are introduced. The collocation version of boundary element method with non-singular approach is presented.
Źródło:: Journal of Applied Mathematics and Computational Mechanics; 2014, 13, 2; 21-32
2299-9965
Pojawia się w:: Journal of Applied Mathematics and Computational Mechanics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Selected problems of damage detection in internally supported plates using one-dimensional Discrete Wavelet Transform
Autorzy:: Guminiak, M.
Knitter-Piątkowska, A.
Powiązania:: https://bibliotekanauki.pl/articles/281731.pdf
Data publikacji:: 2018
Wydawca:: Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:: Kirchhoﬀ plates
Boundary Element Method
Discrete Wavelet Transform
Opis:: The paper is concerned with damage detection in plates while using the Discrete Wavelet Transform (DWT). Rectangular plate structures resting on a Winkler or elastic half-space type foundation, with free boundaries are examined. Plate bending is described and solved by the Boundary Element Method in a direct approach. Defects are introduced by additional edges forming slots in relation to the basic plate domain. Numerical investigation is conducted basing on signal analysis of the structural static response and by taking advantage of multi-resolution analysis (MRA) of the signal function which can be represented in a multi-scale manner. The obtained signal is decomposed with the use of Daubechies or Coiﬂet wavelet families. The white noise generator is used to model measurement inaccuracy which is an inevitable element of a real experiment. The eﬃciency of DWT of the contaminated signal in damage detection is studied.
Źródło:: Journal of Theoretical and Applied Mechanics; 2018, 56, 3; 631-644
1429-2955
Pojawia się w:: Journal of Theoretical and Applied Mechanics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: The stability of a steel welded girder with bending and shear forces included
Autorzy:: Sygulski, R.
Guminiak, M.
Polus, Ł.
Powiązania:: https://bibliotekanauki.pl/articles/387654.pdf
Data publikacji:: 2017
Wydawca:: Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej
Tematy:: buckling analysis
finite element method
boundary element method
Opis:: The stability of the element of a steel welded girder subjected to bending and shear forces is considered. The considered element is a rectangular plate supported on boundary. The type of a plate boundary conditions depend on the types (thickness) of the stiffeners. Considered plate is loaded by in-plane forces causing bending and shear effects. The Finite Element Method was applied to carry out the analysis. Additionally the Boundary Element Method in terms of boundary-domain integral equation was applied to evaluate the critical shear loading.
Źródło:: Acta Mechanica et Automatica; 2017, 11, 1; 14-19
1898-4088
2300-5319
Pojawia się w:: Acta Mechanica et Automatica
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: Crack identification in plates using 1-D Discrete Wavelet Transform
Autorzy:: Knitter-Piątkowska, A.
Guminiak, M.
Hloupis, G.
Powiązania:: https://bibliotekanauki.pl/articles/281595.pdf
Data publikacji:: 2017
Wydawca:: Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:: damage detection
crack
plates
wavelet transform
Boundary Element Method
Opis:: In the present work, the defect detection while using Discrete Wavelet Transform in rectangular plate structures is investigated. The plate bending is described by using the Boundary Element Method with boundary integral equations formulated in a modified simplified approach. The boundary elements of a constant type in a non-singular approach are implemented. Defects are introduced by additional edges forming slots or holes in relation to the basic plate domain. Estimation of the defect position is performed while using wavelet coefficients of curvature and deformation signals as well as a newly proposed moving variance estimator.
Źródło:: Journal of Theoretical and Applied Mechanics; 2017, 55, 2; 481-496
1429-2955
Pojawia się w:: Journal of Theoretical and Applied Mechanics
Dostawca treści:: Biblioteka Nauki

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