Mechanics of Advanced Materials and Structures,
Год журнала:
2023,
Номер
31(26), С. 8095 - 8112
Опубликована: Сен. 11, 2023
Mitigating
ambient
vibrations
using
periodic
pile
barriers
has
gained
significant
attention
in
the
past
decade.
The
width
of
bandgap
and
attenuation
coefficient
are
two
important
factors
that
determine
vibration
reduction
capabilities
barriers.
In
certain
situations,
vertical
anti-plane
may
occur,
such
as
those
generated
by
subways.
Therefore,
focus
this
article
is
to
optimize
coefficients
shear
waves
Firstly,
a
single-objective
topology
optimization
framework
developed
based
on
Genetic
Algorithm
(GA)
maximize
at
target
frequency.
considers
effects
frequency,
elastic
modulus
soil,
wave
vector
direction.
A
comparison
between
optimized
traditional
performed
demonstrate
superiority
design.
Secondly,
multi-objective
non-dominated
sorting
GA
II
(NSGA-II)
investigate
relationship
filling
fraction,
well
width.
results
indicate
higher
fraction
larger
coefficient,
while
there
tradeoff
ratio
Thirdly,
an
established
considering
effect
moving
load,
coverage
rate
frequency
range
defined
design
Finally,
numerical
simulations
conducted
validate
effectiveness
mitigating
when
finite
number
rows
used.
Journal of Vibration and Control,
Год журнала:
2025,
Номер
unknown
Опубликована: Май 19, 2025
The
environmental
vibration
caused
by
rail
transit
operation,
especially
low-frequency
vibration,
can
have
harmful
effects
on
adjacent
buildings
and
human
health,
it
has
the
characteristics
of
long
transmission
distance,
difficult
isolation,
high
harm.
In
response
to
hazards
transit,
this
paper
adopts
a
periodic
pile
isolation
method
proposes
phononic-like
crystal
(PLC)
structure
composed
pipe
pile,
PLC
metaconcrete
material,
matrix.
Firstly,
band
is
calculated
using
finite
element
method,
its
attenuation
waves
are
analyzed.
Secondly,
influence
parameters
gap
(BG)
analyzed,
BG
regulated,
providing
guidance
for
application
design
structures
in
different
practical
engineering
projects.
Finally,
performance
applications
analyzed
verified
on-site
measured
data.
results
indicate
that
opens
five
BGs
frequency
range
200
Hz,
amplitude
mostly
above
15
dB.
Moreover,
field
monitoring
data
show
significantly
attenuate
propagation
soil,
maximum
acceleration
reduced
43.9%,
which
remarkable
effect.
proposed
significant
effect,
provide
novel
technology
solving
problems
also
reference
designing
isolation.
Philosophical Transactions of the Royal Society A Mathematical Physical and Engineering Sciences,
Год журнала:
2024,
Номер
382(2278)
Опубликована: Июль 29, 2024
Periodic
wave
barriers
have
been
widely
used
to
manipulate
elastic
waves
propagating
in
saturated
and
single-phase
soil
due
their
attenuation
zone
properties.
However,
it
is
difficult
promote
application
of
periodic
unsaturated
soils
complex
constitutive
relationship.
In
this
study,
manipulation
surface
by
in-filled
trench
has
studied
based
on
the
theory.
The
dispersion
relations
a
structure
for
are
determined.
mechanism
evanescent
revealed.
Next,
effects
several
key
parameters
zones
comprehensively
discussed.
It
found
that
particular
range
material
parameter,
attenuated
over
entire
frequency
viscosity
fluid.
Finally,
barrier
designed
according
field
test
ground
vibration
induced
train,
its
performances
mitigating
conducted
compared
conducting
analysis
time
domain.
This
investigation
provides
new
insight
manipulating
barriers.
article
part
theme
issue
‘Current
developments
acoustic
metamaterials
science
(Part
1)’.
