...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...

...Mohammad Nezami; Atta Oveisi; Mohammad Mehdi Mohammadi A few years after the time Budiansky [ 11 ] considered the natural sloshing frequency for horizontal container, the sloshing suppression behavior in presence of the baffles considered as an important method in sloshing suppression. Since...

...Takashi Ikeda; Raouf A. Ibrahim where p n represents the natural frequency of the n th sloshing mode. Applying Eq. (7) to Eqs. (1) – (4) and (6) , one can obtain the following equations in dimensionless form (9) ∂ 2 φ ∂ x 2 + ∂ 2 φ ∂ z 2...

...R. D. Firouz-Abadi; M. R. Borhan-Panah The present research aims at developing a boundary element model for the sloshing of a flowing liquid in a three dimensional rigid tank. Using the perturbation approach, the nonlinear boundary conditions of the liquid free-surface are linearized about...

...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...

... of National Institute for Earth Science and Disaster Prevention, Japan. The integral formulas used in the derivation of the solution are listed below. The sloshing of contained liquid is one of the major considerations in the design of liquid storage tanks under dynamic excitation. In the past...

...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...