000015871 001__ 15871
000015871 005__ 20161115135332.0
000015871 04107 $$aeng
000015871 046__ $$k2013-06-12
000015871 100__ $$aOliveto, N.
000015871 24500 $$aNon-Linear Dynamics of Electrical Equipment Cables

000015871 24630 $$n34.$$pComputational Methods in Structural Dynamics and Earhquake Engineering
000015871 260__ $$bNational Technical University of Athens, 2013
000015871 506__ $$arestricted
000015871 520__ $$2eng$$aIn power substations, electrical cables are commonly observed in configurations that cannot be explained by tension stress states only. Moreover, during extreme excitations such as earthquakes, they can be subjected to large displacements and rotations, as well as forces that can lead to failure of both the cables and the equipment to which they are connected. In this paper a three-dimensional geometrically exact beam model is presented and used to describe the static and dynamic behavior of electrical equipment cables. The model is implemented in MATLAB and applied to a flexible conductor recently tested at the SEESL laboratory at the University at Buffalo. Both static and dynamic numerical applications are performed. First the initial configuration of the tests is obtained by imposing the end displacements and rotations to a straight and unstrained cable. Then the cable is subjected to resonant harmonic out-of-plane and in-plane horizontal ground motions. Due to the high frequency components resulting from the axial response of the cable, and to the fact that the Newmark time-integration algorithm used herein generally fails to conserve energy, very small time steps are needed for the algorithm to converge. Although algorithms have been proposed in the literature, which introduce numerical damping to stabilize the computations, the introduction of real forms of damping in the model and the simulation of the dynamic experimental tests performed at the University at Buffalo are object of current work.

000015871 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000015871 653__ $$aCable Dynamics, Large Displacements, Large Rotations, Earthquake Excitation.

000015871 7112_ $$aCOMPDYN 2013 - 4th International Thematic Conference$$cIsland of Kos (GR)$$d2013-06-12 / 2013-06-14$$gCOMPDYN2013
000015871 720__ $$aOliveto, N.$$iSivaselvan, M.
000015871 8560_ $$ffischerc@itam.cas.cz
000015871 8564_ $$s254724$$uhttps://invenio.itam.cas.cz/record/15871/files/1599.pdf$$yOriginal version of the author's contribution as presented on CD, section: CD-RS 03 COMPUTATIONAL SEISMIC STRUCTURAL ANALYSIS
.
000015871 962__ $$r15525
000015871 980__ $$aPAPER