PL
 |
EN
Ten serwis zostanie wyłączony 2025-02-11.
Nowa wersja platformy, zawierająca wyłącznie zasoby pełnotekstowe, jest już dostępna.
Przejdź na https://bibliotekanauki.pl
Preferencje help
Polish version English version Język
Widoczny [Schowaj] Abstrakt
Liczba wyników

Znaleziono wyników: 7

Liczba wyników na stronie
first rewind previous Strona / 1 next fast forward last
Wyniki wyszukiwania
Wyszukiwano:
w słowach kluczowych:  mnożniki Lagrange'a
help Sortuj według:

help Ogranicz wyniki do:
first rewind previous Strona / 1 next fast forward last
1
Content available remote Free longitudinal vibrations of step like rods with additional discrete elements
100%
Posiadała B. , Wilczak R.
Vibrations in Physical Systems
|
2004
|
tom Vol. 21
311--314
2
Content available remote Numerical model of elastic laminated glass beams under finite strain
100%
Zemanova A. , Zeman J. , Sejnoha M.
Archives of Civil and Mechanical Engineering
|
2014
|
tom Vol. 14, no. 4
734--744
EN
Laminated glass structures are formed by stiff layers of glass connected with a compliant plastic interlayer. Due to their slenderness and heterogeneity, they exhibit a complex mechanical response that is difficult to capture by single-layer models even in the elastic range. The purpose of this paper is to introduce an efficient and reliable finite element approach to the simulation of the immediate response of laminated glass beams. It proceeds from a refined plate theory due to Mau (1973), as we treat each layer independently and enforce the compatibility by the Lagrange multipliers. At the layer level, we adopt the finite-strain shear deformable formulation of Reissner (1972) and the numerical framework by Ibrahimbegović and Frey (1993). The resulting system is solved by the Newton method with consistent linearization. By comparing the model predictions against available experimental data, analytical methods and two-dimensional finite element simulations, we demonstrate that the proposed formulation is reliable and provides accuracy comparable to the detailed two-dimensional finite element analyzes. As such, it offers a convenient basis to incorporate more refined constitutive description of the interlayer.
3
Content available Inventory stocks management under the limited capital conditions – nonlinear analysis
84%
Ślaski P.
Gospodarka Materiałowa i Logistyka
|
2015
|
nr 5
27-31
PL
W artykule przedstawiono możliwość wykorzystania mnożników Lagrangea do zarządzania zapasami w warunkach ograniczonego kapitału. Zaproponowano weryfikację ww. metody w oparciu o programowanie nieliniowe i aplikację Solver.
EN
The article presents the use of Lagrange multipliers functions to inventory stocks management under the limited capital conditions. The example verified the method based on the process analysis, the nonlinear programming and the Solver application.
4
Content available remote Single and Double Lagrange multipliers approaches applied to Scalar potential formulation in magnetostatic FEM
84%
Henneron T. , Aubertin M. , Boiteau O. , Piriou F. , Guerin P. , Mipo J.-C.
Przegląd Elektrotechniczny
|
2010
|
tom Nr 5
119-122
EN
In this paper, we propose to introduce the single and double Lagrange multipliers approaches in the case of the finite element method (FEM). These approaches allow non-conforming meshes to be linked together. The methods introduced are developed in the case of a magnetostatic problem solved by the scalar potential formulation. An application is studied and the results obtained by both approaches are compared.
PL
W artykule przedstawiono zastosowanie pojedynczych i podwójnych mnożników Lagrangea stosowanych w metodzie elementów skończonych. To podejście pozwala na połączenie niezgodnych siatek. Metodę rozwinięto dla problemu magnetostatycznego rozwiązywanego z użyciem potencjału skalarnego. Porównano wyniki otrzymane z zastosowaniem proponowanej metody i metod klasycznych.
5
Content available Inventory stocks management under the limited capital conditions – nonlinear analysis
84%
Ślaski P.
Gospodarka Materiałowa i Logistyka
|
2015
|
tom nr 5
27--31
EN
The article presents the use of Lagrange multipliers functions to inventory stocks management under the limited capital conditions. The example verified the method based on the process analysis, the nonlinear programming and the Solver application.
PL
W artykule przedstawiono możliwość wykorzystania mnożników Lagrangea do zarządzania zapasami w warunkach ograniczonego kapitału. Zaproponowano weryfikację ww. metody w oparciu o programowanie nieliniowe i aplikację Solver.
6
The Lagrange multiplier and the stationary Stokes equations
84%
Ożański W. S.
Journal of Applied Analysis
|
2017
|
tom Vol. 23, nr 2
137--140
EN
We briefly discuss the notion of the Lagrange multiplier for a linear constraint in the Hilbert space setting, and we prove that the pressure p appearing in the stationary Stokes equations is the Lagrange multiplier of the constraint div u = 0.
7
Content available remote Optimal generalized Hohmann transfer with plane change using lagrange multipliers
84%
Kamel O. M. , Soliman A. S. , Amin M. R.
|
2017
|
tom Vol. 21, nr 1
11--16
EN
The optimized orbit transfer of a space vehicle, revolving initially around the primary, in a similar orbit to that of the Earth around the Sun, in an elliptic trajectory, to another similar elliptic orbit of an adequate outer planet is studied in this paper. We assume the elements of the initial orbit to be that of the Earth, and the elements of the final orbit to be that of an outer adequate planet, Mars for instance. We consider the case of two impulse generalized Hohmann non coplanar orbits. We need noncoplanar (plane change) maneuvers mainly because: 1) a launch-site location restricts the initial orbit inclination for the vehicle; 2) the direction of the launch can influence the amount of velocity the booster must supply, so certain orientations may be more desirable; and 3) timing constraints may dictate a launch window that isn’t the best, from which we must make changes[3]. We used the Lagrange multipliers method to get the optimum of the total minimum energy required ΔVT , by optimizing the two plane change angles 1 and 2, where 1 is the plane change at the first instantaneous impulse at peri-apse, and 2 the plane change at the second instantaneous thrust at apo-apse. We adopt the case of Earth - Mars, as a numerical example.
first rewind previous Strona / 1 next fast forward last
JavaScript jest wyłączony w Twojej przeglądarce internetowej. Włącz go, a następnie odśwież stronę, aby móc w pełni z niej korzystać.