The Effects Of Multiple Vertical Baffles On
Sloshing Phenomenon In Rectangular Tanks
Author(s)
M. Hosseini & P. Farshadmanesh
Abstract
One of the phenomena in storage tanks subjected to earthquake excitations is the
sloshing of impounded liquid. The use of baffles for reducing the sloshing effects
has been taken into consideration by some researchers in recent years, however,
the use of multiple baffles has not been taken into consideration so much. In this
study the effect of using multiple vertical baffles in rectangular tanks has been
investigated numerically by Finite Element Analyses. After verification of the
numerical modeling, tanks with various scales were analyzed subjected to both
harmonic and seismic excitations with various intensities to find out the effect of
scaling factor. Then, various number of vertical baffles form 1 to 4, were
considered at the upper level of the tank and analyses were repeated to realize the
effect of baffles on the sloshing. The maximum water level fluctuation was
calculated for comparison. Different values were also considered for the
submerged depth of baffles to find the more effective depth in decreasing the
sloshing effect. Numerical results show that for each series of earthquakes with
similar frequency content it is possible to find an optimal number of baffles to
minimize the sloshing effect. Also for each number of baffles it is possible to
find an optimal submerged depth of baffles for minimizing the sloshing effect.
Keywords: water level fluctuation, scaling factor, hydro-dynamic pressure, THA.
1 Introduction
In tanks subjected to earthquake excitations sloshing of liquid is one of the most
important phenomena, and past earthquakes have shown that this phenomenon
Keywords
water level fluctuation, scaling factor, hydro-dynamic pressure, THA
Related Book
Other papers in this volume
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