International Journal of Mechanical Sciences,
Год журнала:
2023,
Номер
248, С. 108195 - 108195
Опубликована: Фев. 11, 2023
In
this
paper,
an
advanced
computational
method
is
proposed,
whose
aim
to
obtain
approximately
optimal
design
of
a
particular
class
acoustic
metamaterials,
by
means
novel
combination
multi-objective
optimization
and
dimensionality
reduction.
Metamaterials
are
modeled
as
beam
lattices
with
internal
local
resonators
coupled
the
microstructure
through
viscoelastic
phase.
The
dynamics
governed
set
integro-differential
equations,
that
transformed
into
Z-Laplace
space
in
order
derive
eigenproblem
solution
provides
dispersion
relation
free
in-plane
propagating
Bloch
waves.
A
problem
stated,
achieve
largest
multiplicative
trade-off
between
bandwidth
first
stop
band
one
successive
pass
metamaterial
frequency
spectrum.
Motivated
multi-dimensionality
parameters
space,
goal
above
achieved
integrating
numerical
machine
learning.
Specifically,
solved
combining
sequential
linear
programming
algorithm
principal
component
analysis,
exploited
data
reduction
technique
applied
properly
sampled
field
gradient
directions,
perform
optimized
sensitivity
analysis.
This
represents
original
way
applying
analysis
connection
optimization.
Successful
performances
proposed
its
savings
demonstrated.
Heliyon,
Год журнала:
2025,
Номер
11(3), С. e41985 - e41985
Опубликована: Янв. 18, 2025
Mechanical
metamaterials
are
architected
structures
with
unique
functionalities,
such
as
negative
Poisson's
ratio
and
stiffness,
which
widely
employed
for
absorbing
energy
of
quasi-static
impact
loads,
giving
improved
mechanical
response.
Acoustic/elastic
metamaterials,
their
dynamic
counterparts,
rely
on
frequency-dependent
properties
microstructure
elements,
including
mass
density
bulk
modulus,
to
control
the
propagation
waves.
Although
introduced
significant
contribution
solving
independently
static
problems,
they
were
facing
certain
resistance
use
in
real-world
engineering
mainly
because
a
lack
integrated
systems
possessing
both
vibration
attenuation
performance.
Advances
manufacturing
processes
material
computational
science
now
enable
creation
hybrid
offering
multifunctionality
terms
simultaneous
properties,
them
ability
controlling
waves
while
withstanding
applied
loading
conditions.
Exploring
towards
this
direction,
review
paper
introduces
design
process
multifunctional
properties.
We
emphasize
still
remaining
challenges
how
can
be
potentially
implemented
solutions.
