physica status solidi (a),
Journal Year:
2024,
Volume and Issue:
unknown
Published: Dec. 17, 2024
Local
resonance
metamaterials
have
addressed
the
limitations
of
Bragg
scattering‐type
periodic
structures
in
low‐frequency
applications,
providing
a
new
path
for
development
seismic
systems.
However,
achieving
broadband
attenuation
waves
within
compact
structural
design
remains
challenging.
This
article
presents
novel
local
metamaterial
(SM)
with
an
ultra‐low
frequency
broad
bandgap.
It
consists
external
steel
frame,
peripheral
connecting
beams,
bottom
rubber
cushions,
and
central
resonator.
By
combining
dispersion
analysis
acoustic
cone
methods
to
calculate
its
bandgap,
range
SM
is
clarified,
influence
parameter
changes
on
upper
lower
limits
bandgap
discussed.
The
results
demonstrate
that
domain
can
be
further
broadened
through
gradient
design,
confirms
proposed
achieve
wave
from
1.0611
10.895
Hz.
Finally,
time‐domain
elucidates
dynamic
response
SM,
validating
study's
effectiveness.
herein
has
practical
economic
applications
surface
vibration
isolation,
effectively
protecting
large
infrastructure
civil
engineering
structures.
Mechanics of Advanced Materials and Structures,
Journal Year:
2024,
Volume and Issue:
31(26), P. 7703 - 7713
Published: April 26, 2024
The
paper
explores
the
increasing
concern
over
environmental
vibrations
resulting
from
machine
operation
and
rail
transit.
Notably,
low-frequency
generate
surface
waves
with
characteristics
like
significant
energy
carrying
capacity,
long-distance
propagation,
slow
attenuation.
primary
challenge
in
ground
vibration
attenuation
lies
addressing
vibrations.
study
employs
finite
element
method
to
investigate
of
a
three-component
local
resonance
pile
three-dimensional
space.
analysis
delves
into
impact
unit
cell
structure's
geometry
size
on
bandgaps,
influences
period
number
Attenuation
Zones
(AZs)
are
also
discussed.
Furthermore,
comparison
is
made
regarding
performance
two-component
pile.
findings
reveal
that
appropriate
design
can
complete
bandgap.
concrete
radius,
rubber
layer
thickness,
buried
depth
significantly
affect
Rayleigh
wave
Frequency
domain
indicates
an
increase
expands
AZs
bandgap
range.
Time
demonstrates
noticeable
decrease
acceleration
amplitude
within
research
results
presented
this
offer
novel
approach
address
