...Quansheng Zang; Jun Liu; Yang Zhou; Gao Lin This paper explores an isogeometric boundary element method (IGA-BEM) for sloshing problems in cylindrical tanks with single and multiply connected domains. Instead of the Lagrange basis functions used in the standard BEM, the nonuniform rational B...

... of conformal coordinate transformation, leading to standard truncated matrix Eigen-value problem from which fluid motion characteristics (Eigen-frequencies and wave modes) are calculated. The effects of tube eccentricity and radius ratio upon the three lowest antisymmetric and symmetric sloshing frequencies...

... Flow , Vol. 1, Academic , London, UK . [2] Ibrahim , R. A. , Pilipchuk , V. N. , and Ikeda , T. , 2001 , “ Recent Advances in Liquid Sloshing Dynamics ,” ASME Appl. Mech. Rev. , 54 ( 2 ), pp. 133 – 199 . 10.1115/1.3097293 [3] Ibrahim , R. A. , 2005 , Liquid Sloshing...

... φ w ] + [ B 11 B 12 B 21 B 22 ] [ q f q w ] = 0 The boundary element model of liquid sloshing in a tank can be obtained by applying the Green's second identity to the Laplace equation...

...M. Utsumi; K. Ishida The radial second mode of sloshing in a circular cylindrical oil storage tank induces an out-of-plane deformation of the floating roof deck. The radial contraction of the deck due to this out-of-plane deformation contains modal components with circumferential wave numbers 0...

...M. Utsumi This paper investigates the use of dynamic vibration absorbers as a means to reduce the vibration of a floating roof due to sloshing caused by long-period earthquakes. It is shown that the damping ratio of the primary system caused by the dynamic vibration absorbers increases with rising...

...M. Utsumi This paper investigates a variational method for theoretically determining the first damping ratio of sloshing in cylindrical and arbitrary axisymmetric tanks. In this method, a virtual work expression for the viscous terms in the Navier–Stokes equations is transformed into the first-mode...

... rigid that the vibration modes (sloshing and bulging) induced by earthquake can affect the distribution of their liquid pressure and seismic load. It is, therefore, important for the seismic design of water storage tanks to consider such elastic deformation theoretically and experimentally...

...Nobuyuki Kobayashi; Yusuke Koyama A semi-active sloshing suppression control method for the contained liquid in the closed vessel is presented. The presented method uses the air spring effect of the gas chamber on the liquid surface, when the closed vessel is divided into two separated compartments...

...M. Utsumi; K. Ishida In a previous paper, a cost-efficient modal analysis method for the vibration of a floating roof coupled with nonlinear sloshing in a circular cylindrical oil storage tank is presented. This method is extended to the case in which the out-of-plane deformation of the roof-deck...

...Spyros A. Karamanos; Dimitris Papaprokopiou; Manolis A. Platyrrachos Motivated by the earthquake response of industrial pressure vessels, the present paper investigates externally-induced sloshing in horizontal-cylindrical and axisymmetric liquid containers. Assuming ideal and irrotational flow...

... accuracy because the natural periods of liquid-tank wall system (shell vibration modes) are much shorter than the natural periods of liquid-floating-roof system (sloshing modes), as shown in the literature ( 10 ). Tank geometry and coordinate system Boundary value problem. The oscillation...

...Tetsuya Matsui An explicit analytical solution is derived for sloshing in a cylindrical liquid storage tank with a single-deck type floating roof under seismic excitation. The floating roof is composed of an inner deck, which may be idealized as an isotropic elastic plate with uniform thickness...

...Nobuyuki Kobayashi; Masahiro Watanabe; Tomokazu Honda; Katsunori Ohno This paper investigates the characteristics of the suppression of sloshing in a vessel by a bulkhead that divides the vessel vertically into two sections but allows communication between two sections at the lower part...

...Tetsuya Matsui An analytical solution is presented to predict the sloshing response of a cylindrical liquid storage tank with a floating roof under seismic excitation. The contained liquid is assumed to be inviscid, incompressible, and irrotational, while the floating roof is idealized...

...Spyros A. Karamanos; Lazaros A. Patkas; Manolis A. Platyrrachos The present paper investigates sloshing effects on the earthquake design of horizontal-cylindrical and spherical industrial vessels. Assuming small-amplitude free-surface elevation, a linearized sloshing problem is obtained, and its...