Temat: modified Galerkin method - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Vibration suppression of truncated conical shells embedded with magnetostrictive layers based on first order shear deformation theory
Autorzy:: Mohammadrezazadeh, Shahin
Jafari, Ali Asghar
Powiązania:: https://bibliotekanauki.pl/articles/281556.pdf
Data publikacji:: 2019
Wydawca:: Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:: isotropic truncated conical shell
magnetostrictive layers
active vibration control
first order shear deformation theory
Ritz method
modified Galerkin method
Opis:: Vibration phenomena in mechanical structures including conical shells are usually undesirable. In order to overcome this problem, this study investigates active vibration control of isotropic truncated conical shells containing magnetostrictive actuators. The first-order shear deformation theory and the Hamilton principle are handled to obtain vibration equations. Moreover, a negative velocity feedback control law is used to actively suppress the vibration. The Ritz and modified Galerkin methods are utilized to obtain results of shell vibration. The results are validated by comparison with the results of literature and finite element software. Finally, the effects of control gain value, magnetostrictive layers thickness, isotropic layer thickness, length and semi-vertex angle of the conical shell on vibration suppression characteristics are obtained in details.
Źródło:: Journal of Theoretical and Applied Mechanics; 2019, 57, 4; 957-972
1429-2955
Pojawia się w:: Journal of Theoretical and Applied Mechanics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Existence and Uniqueness of Time Periodic Solution to the Viscous Modified Degasperis-Procesi Equation
Autorzy:: Asaduzzaman, Md.
Ali, Md. Zulfikar
Powiązania:: https://bibliotekanauki.pl/articles/1031446.pdf
Data publikacji:: 2020
Wydawca:: Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:: Galerkin’s method
Leray-Schauder fixed point theorem
time periodic solution
viscous modified Degasperis-Procesi equation
Opis:: In this paper, we establish the existence and uniqueness criteria of time periodic solution to the viscous modified Degasperis-Procesi (vmDP for short) equation with periodic boundary value conditions. The analysis of this study is based on Galerkin’s method and Leray-Schauder fixed point theorem. Using Galerkin’s method some uniform priori estimates of approximate solution to the corresponding equation of vmDP has been constructed. Furthermore, the efficient and straightforward existence and uniqueness criteria of time periodic solution to the vmDP with periodic boundary value conditions has been obtained.
Źródło:: World Scientific News; 2020, 142; 25-43
2392-2192
Pojawia się w:: World Scientific News
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Inertia effects in a multilobe conical bearing lubricated with a couple stress fluid
Autorzy:: Walicka, A.
Walicki, E.
Jurczak, P.
Powiązania:: https://bibliotekanauki.pl/articles/265020.pdf
Data publikacji:: 2019
Wydawca:: Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:: efekt bezwładności
równanie Reynoldsa
metoda Galerkina
łożysko
inertia effects
modified Reynolds equation
Galerkin method
mechanical parameters of bearing
additives
Opis:: In this paper, a multilobe conical bearing is analyzed. A lubricant modelled by a couple stress fluid flows In the bearing clearance . The Galerkin method is used to determine the mechanical parameters of multilobe journal bearings. An example of a two-lobe conical bearing is discussed in detail. The inertia of the flowing lubricant is taken into account in the analysis. It has been found that the increase of the couple stress generates an increase the pressure in the clearance.
Źródło:: International Journal of Applied Mechanics and Engineering; 2019, 24, 2; 439-451
1734-4492
2353-9003
Pojawia się w:: International Journal of Applied Mechanics and Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Nonlinear Free Vibration Analysis of Micro-beams Resting on Viscoelastic Foundation Based on the Modified Couple Stress Theory
Autorzy:: Jam, J. E.
Noorabadi, M.
Namdaran, N.
Powiązania:: https://bibliotekanauki.pl/articles/139530.pdf
Data publikacji:: 2017
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: nonlinear free vibration
size dependence
modified couple stress theory
Euler-Bernoulli beam model
Galerkin method
swobodne drgania nieliniowe
zależność od wielkości
zmodyfikowana teoria naprężeń momentowych
model belki Eulera-Bernouliego
metoda Galerkina
Opis:: In this paper, nonlinear free vibration analysis of micro-beams resting on the viscoelastic foundation is investigated by the use of the modified couple stress theory, which is able to capture the size effects for structures in micron and sub-micron scales. To this aim, the governing equation of motion and the boundary conditions are derived using the Euler–Bernoulli beam and the Hamilton’s principle. The Galerkin method is employed to solve the governing nonlinear differential equation and obtain the frequency-amplitude algebraic equation. Finally, the effects of different parameters, such as the mode number, aspect ratio of length to height, the normalized length scale parameter and foundation parameters on the natural frequency-amplitude curves of doubly simply supported beams are studied.
Źródło:: Archive of Mechanical Engineering; 2017, LXIV, 2; 239-256
0004-0738
Pojawia się w:: Archive of Mechanical Engineering
Dostawca treści:: Biblioteka Nauki

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