Temat: transform method - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Application of the differential transform method to the free vibration analysis of functionally graded timoshenko beams
Autorzy:: Özdemir, Ö.
Powiązania:: https://bibliotekanauki.pl/articles/281244.pdf
Data publikacji:: 2016
Wydawca:: Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:: differential transform method
functionally graded beam
Timoshenko beam
Opis:: In this study, free vibration characteristics of a functionally graded Timoshenko beam that undergoes flapwise bending vibration is analysed. The energy expressions are derived by introducing several explanotary figures and tables. Applying Hamilton’s principle to the energy expressions, governing differential equations of motion and boundary conditions are obtained. In the solution part, the equations of motion, including the parameters for rotary inertia, shear deformation, power law index parameter and slenderness ratio are solved using an efficient mathematical technique, called the differential transform method (DTM). Natural frequencies are calculated and effects of several parameters are investigated.
Źródło:: Journal of Theoretical and Applied Mechanics; 2016, 54, 4; 1205-1217
1429-2955
Pojawia się w:: Journal of Theoretical and Applied Mechanics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

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: 3.

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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