000011984 001__ 11984
000011984 005__ 20141205160007.0
000011984 04107 $$aeng
000011984 046__ $$k2008-10-12
000011984 100__ $$aVázquez-Lorenzana, Cesar
000011984 24500 $$aFundamental Frequencies and Critical Circumferential Modes of Fluid-Tank Systems

000011984 24630 $$n14.$$pProceedings of the 14th World Conference on Earthquake Engineering
000011984 260__ $$b
000011984 506__ $$arestricted
000011984 520__ $$2eng$$aIn this work explicit expressions are presented to obtain the fundamental frequency and the circumferential critical n* wave number for the longitudinal critical wave number m=1 for clamped-free vertical cylindrical tanks partially filled with water. The hydrostatic pressure is taken into count, free surface motion is neglected and dynamic pressure is considered like an added virtual mass. The solution is based upon an improved Flügge’s shells theory that is solved by means of the use of covariants and contravariants modals forms. The liquid is assumed as non-viscous and incompressible, and the coupling between the deformable shell and the liquid is taken into count. The solution for the liquid velocity potential satisfies Laplace equation and the relevant boundary condition. A regression model is used in order to fit mathematical results previously computed to obtain two explicit expressions with excellent approximation compared with experimental data. The equations are proposed for the case of steel tanks for a direct use in seismic analysis and design of storage tanks.

000011984 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000011984 653__ $$aFundamental frequencies, Cylindrical tanks, Free vibration, Theory of shells.

000011984 7112_ $$a14th World Conference on Earthquake Engineering$$cBejing (CN)$$d2008-10-12 / 2008-10-17$$gWCEE15
000011984 720__ $$aVázquez-Lorenzana, Cesar$$iUrrutia-Galicia, Jose L.
000011984 8560_ $$ffischerc@itam.cas.cz
000011984 8564_ $$s180789$$uhttps://invenio.itam.cas.cz/record/11984/files/05-01-0129.pdf$$yOriginal version of the author's contribution as presented on CD, Paper ID: 05-01-0129.
000011984 962__ $$r9324
000011984 980__ $$aPAPER