Wszystkie pola: beam on elastic foundation - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Buckling of stepped beams resting on an elastic foundation
Autorzy:: Kuliński, K.
Przybylski, J.
Powiązania:: https://bibliotekanauki.pl/articles/122707.pdf
Data publikacji:: 2015
Wydawca:: Politechnika Częstochowska. Wydawnictwo Politechniki Częstochowskiej
Tematy:: buckling
critical force
stepped beam
Winkler foundation
piezoelectricity
piezoceramics
wyboczenie
siła krytyczna
podłoże Winklera
piezoelektryczność
Opis:: The influence of structural parameters of a stepped beam with two ends fixed and resting on Winkler foundation on its buckling critical force has been discussed in this paper. The structure inhomogeneity results from two piezoceramic plates perfectly bonded at the top and bottom surface of the beam. For the performed analysis five different supports of beam ends which prevent longitudinal displacements have been adopted. Numerical analysis has been divided into two parts. The first part concerns the influence of the system geometry on its critical force, whereas in the second part, a modification of the buckling load resulting from the electric field applied to the piezosegment has been investigated.
Źródło:: Journal of Applied Mathematics and Computational Mechanics; 2015, 14, 4; 115-126
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:: A discrete model for nonlinear vibrations of a simply supported cracked beams resting on elastic foundations
Autorzy:: Khnaijar, A.
Benamar, R.
Powiązania:: https://bibliotekanauki.pl/articles/328710.pdf
Data publikacji:: 2017
Wydawca:: Polska Akademia Nauk. Polskie Towarzystwo Diagnostyki Technicznej PAN
Tematy:: nonlinear
discrete
beam
Winkler foundation
crack
vibration
drgania nieliniowe
podłoże Winklera
belka
pęknięcie
model
Opis:: The present paper introduces a discrete physical model to approach the problem of nonlinear vibrations of cracked beams resting on elastic foundations. It consists of a beam made of several small bars, evenly spaced, connected by spiral springs, presenting the beam bending stiffness. The crack is modeled by a spiral spring with a reduced stiffness and the Winkler soil stiffness is modeled using linear vertical springs. Concentrated masses, presenting the inertia of the beam, are located at the bar ends. The nonlinear effect, due to the axial forces in the bars resulting from the change in their length, is presented by longitudinal springs. This model has the advantage of simplifying parametric studies, because of its discrete nature, allowing any modification in the mass and the stiffness matrices, and in the nonlinearity tensor, to be made separately. After establishing the model, various practical applications are performed without the need of going through all the formulation again. Numerical linear and nonlinear results are given, corresponding to a cracked simply supported beam.
Źródło:: Diagnostyka; 2017, 18, 3; 39-46
1641-6414
2449-5220
Pojawia się w:: Diagnostyka
Dostawca treści:: Biblioteka Nauki

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