Generalized Mathematical Modeling of Tuned Liquid Column Dampers Under Varying Excitation Amplitudes
Earthquake Engineering & Structural Dynamics,
Год журнала:
2025,
Номер
unknown
Опубликована: Янв. 17, 2025
ABSTRACT
The
tuned
liquid
column
damper
(TLCD)
is
an
economical
and
highly
efficient
device
for
controlling
structural
vibrations.
Existing
research
on
TLCDs
primarily
focuses
scenarios
where
the
maximum
displacement
less
than
initial
depth,
ensuring
that
horizontal
tube
remains
filled
with
liquid,
excluding
presence
of
gas.
However,
it
crucial
to
acknowledge
under
substantial
external
excitation
amplitudes,
a
phenomenon
not
thoroughly
encompassed
within
confines
classical
TLCD
model,
possibility
gas
intrusion
into
arises.
This
study
develops
generalized
theoretical
model
varying
amplitudes.
developed
considers
following
two
working
states:
(1)
no
air
in
segment,
aligning
model;
(2)
ingress
left
or
right
side
tube.
Accordingly,
proposed
encompasses
as
special
instance.
Computational
fluid
dynamics
(CFD)
simulations
are
conducted
TLCDs,
outcomes
meticulously
compared
predictions
from
model.
It
confirmed
works
well
predicting
hysteretic
behavior
different
Based
effects
length
ratio
(the
total
length)
energy
dissipation
characteristics,
impacts
intensity
control
efficiency,
comprehensively
investigated.
results
indicate
has
negative
performance.
reported
findings
hold
significant
implications
understanding
dynamic
large
amplitude
excitations.
Язык: Английский
Using tuned liquid column dampers (TLCDs) for heave motion mitigation of very large floating structures (VLFSs)
Ocean Engineering,
Год журнала:
2025,
Номер
321, С. 120391 - 120391
Опубликована: Янв. 18, 2025
Язык: Английский
Nonlinear and parametric analysis on the influence of design parameters of a liquid dynamic absorber for multi-directional lateral vibration mitigation
Engineering Research Express,
Год журнала:
2025,
Номер
7(1), С. 015575 - 015575
Опубликована: Март 18, 2025
Abstract
This
paper
investigates
a
tuned
toroidal
multi-column
liquid
dynamic
vibration
absorber
(TTLCD)
for
multi-directional
lateral
control
in
engineering
systems,
order
to
address
the
directional
limitations
of
traditional
unidirectional
absorbers.
A
nonlinear
model
TTLCD,
incorporating
hydrodynamic
damping,
is
developed.
Modified
formulas
natural
frequency,
effective
length,
and
area
ratio
are
derived
based
on
TTLCD’s
geometric
characteristics.
The
TTLCD-controlled
system’s
response
free
harmonic
excitations
analyzed
numerically
using
an
adaptive
step-size
method.
parametric
study
influence
design
parameters,
including
barrier
count,
ratio,
length
mass
tuning
attenuation,
exploring
parameter
interactions
optimal
damping
performance.
Results
demonstrate
effectiveness
controlling
vibrations
under
various
excitations.
Specifically,
resonance
reduced
3.48%–12.3%
uncontrolled
at
frequency
ratios
0.934–0.96
8%–6%.
primarily
affects
size
with
minimal
impact
allowing
up
50%
reduction
mean
diameter.
Design
charts
provided
efficient
initial
design,
facilitating
enhanced
performance
system
stability.
Язык: Английский
Experiment-in-the-Loop system for fast and effective tuning of active vibration controllers
International Journal of Mechanical Sciences,
Год журнала:
2024,
Номер
unknown, С. 109753 - 109753
Опубликована: Сен. 1, 2024
Язык: Английский
Theoretical and Experimental Investigation of Flexible Air Spring Stiffness in a Tuned Liquid Column Gas Damper for Vertical Vibration Control
Journal of Building Engineering,
Год журнала:
2024,
Номер
98, С. 110958 - 110958
Опубликована: Окт. 10, 2024
Язык: Английский
Seismic response control of shear frame structure using a novel tuned-mass type composite column
Engineering Structures,
Год журнала:
2024,
Номер
322, С. 119160 - 119160
Опубликована: Окт. 21, 2024
Язык: Английский
Semi-active omnidirectional liquid column vibration absorber with rapid frequency adjustment capability
Mechanical Systems and Signal Processing,
Год журнала:
2024,
Номер
224, С. 112093 - 112093
Опубликована: Ноя. 6, 2024
Язык: Английский
Dynamic Analysis and Vibration Control of Additively Manufactured Thin-Walled Polylactic Acid Polymer (PLAP) and PLAP Composite Beam Structures: Numerical Investigation and Experimental Validation
Materials,
Год журнала:
2024,
Номер
17(22), С. 5478 - 5478
Опубликована: Ноя. 9, 2024
This
study
primarily
presents
a
numerical
investigation
of
the
dynamic
behavior
and
vibration
control
in
thin-walled,
additively
manufactured
(AM)
beam
structures,
validated
through
experimental
results.
Vibration
thin-walled
structures
has
gained
significant
attention
recently
because
vibrations
can
severely
affect
structural
integrity.
Therefore,
it
is
necessary
to
minimize
these
or
keep
them
within
acceptable
limits
ensure
structure's
In
this
study,
AM
were
made
polylactic
acid
polymer
(PLAP),
short
carbon
fiber
reinforced
PLAP
(SCFR|PLAP),
continuous
(CCFR|PLAP),
with
0°|0°
layer
orientations.
The
finite
element
modeling
(FEM)
integrated
macro
composite
(MFC)
was
carried
out
Abaqus.
initial
four
modal
frequencies
bending
modes
(BMs)
their
respective
shapes
acquired
simulation.
It
crucial
highlight
findings
that
reveal
discrepancies
1st
beams,
ranging
up
1.5%
compared
values.
For
2nd,
3rd,
4th
frequencies,
are
10%.
Subsequently,
frequency
response
analysis
(FRA)
observe
frequency-dependent
amplitude
spectrum
at
BM
frequencies.
Despite
discrepancy
values
between
datasets,
there
consistency
overall
as
varied.
THz
spectroscopy
performed
identify
voids
misalignment
errors
actual
models.
Finally,
using
MFC
(M8507-P2)
examined
each
kinematically
excited
structure.
After
applying
counterforce
MFC,
controlled
amplitudes
for
PLAP,
SCFR|PLAP,
CCFR|PLAP
configurations
approximately
±19
µm,
±16
±13
respectively.
trend
observed
consistent
valuable
insights
estimating
trends
related
structures.
Язык: Английский