Effectively reduce transient vibration of 2D wing with bi-stable metamaterial
International Journal of Mechanical Sciences,
Год журнала:
2024,
Номер
272, С. 109172 - 109172
Опубликована: Март 8, 2024
Язык: Английский
Dynamic responses of shear thickening fluid-filled lattice structures
International Journal of Impact Engineering,
Год журнала:
2024,
Номер
189, С. 104954 - 104954
Опубликована: Март 29, 2024
Lattice
structures
that
possess
exceptional
energy
absorption
capabilities
show
promise
across
various
fields.
However,
their
tendency
to
exhibit
relatively
lower
stiffness
due
rotation
or
bending
during
impacts
poses
a
challenge.
Shear
thickening
fluid
with
the
unique
property
of
shear
effect
can
be
an
ideal
filler
overcome
limitation
lattice
structure.
In
this
paper,
composites
combined
STF
new
were
fabricated
investigate
dynamic
response
using
experimental
and
numerical
means
found
incorporating
into
these
not
only
preserved
inherent
mechanical
characteristics
but
also
led
substantial
improvements
on
performance.
The
displayed
noteworthy
boost
in
stiffness,
increasing
significantly
from
11.02
85.56
times.
Additionally,
there
was
improvement
absorption,
ranging
2.78
5.51
These
findings
indicate
holds
more
enhancing
structure's
compared
its
capacity.
Moreover,
strain
rate,
weight
fraction
STF,
cell
size
structure
considered
further
impact
behaviour
STF-filled
structures.
Our
increase
following
filling
is
correlated
rate
decreases
when
increased.
critical
predicted,
around
104
s−1,
which
indicates
onset
shear-thickening
STF.
Furthermore,
it
observed
higher
fractions
responsive
changes
rate.
initially
properties
experienced
most
significant
after
being
filled
optimal
outcomes
provide
valuable
insights
for
design
practical
applications.
Язык: Английский
Nonlinear free vibrations of Timoshenko–Ehrenfest beams using finite element analysis and direct scheme
Nonlinear Dynamics,
Год журнала:
2024,
Номер
112(9), С. 7199 - 7213
Опубликована: Март 12, 2024
Язык: Английский
Mechanical properties of the novel spider-web bionic hierarchical honeycomb under out-of-plane crushing
Applied Physics A,
Год журнала:
2024,
Номер
130(1)
Опубликована: Янв. 1, 2024
Язык: Английский
Dynamic stability of the Mindlin-Reissner plate using a time-modulated axial force
Mechanics Based Design of Structures and Machines,
Год журнала:
2024,
Номер
unknown, С. 1 - 18
Опубликована: Июнь 14, 2024
A
time-periodic
axial
force
acting
on
a
continuous
structure
can
be
destabilized
by
parametric
excitation.
Moreover,
it
is
capable
of
increasing
the
equivalent
damping
and
shortening
transient
vibrations.
In
this
work,
concept
extended,
dynamic
stability
Mindlin-Reissner
plate
analyzed.
The
FE
formulation
for
four-node
element
derived
employing
variational
approach
including
action
an
force.
system
evaluated
both
numerically
analytically,
using
Floquet
theory
first-order
approximation
based
averaging
method,
respectively.
influence
length,
thickness,
aspect
ratio
highlighted.
It
demonstrated
that
instability
tongue
at
combination
resonance
frequency
summation
type
shifted
toward
higher
amplitudes
width
decreasing
length.
Alternatively,
in
vicinity
difference
shows
antiresonance
which
maximized
exactly
opposite
tuning
design.
This
guideline
important
when
design
under
harmonic
considered.
Язык: Английский
Assessment and control of the mine tremor disaster induced by the energy accumulation and dispersion of thick-hard roofs
International Journal of Mining Science and Technology,
Год журнала:
2024,
Номер
34(7), С. 925 - 941
Опубликована: Июль 1, 2024
Язык: Английский
Dynamic stability analysis of tapered rotating beams with 2D functionally graded materials: A comparative study of Floquet theory approaches
Thin-Walled Structures,
Год журнала:
2025,
Номер
unknown, С. 113257 - 113257
Опубликована: Апрель 1, 2025
Язык: Английский
Numerical investigation on effect of different parameters on nonlinear vibration response of fully geometrically exact Timoshenko beams
Applied Physics A,
Год журнала:
2024,
Номер
130(9)
Опубликована: Авг. 9, 2024
Язык: Английский
Research on Small Sample Rolling Bearing Fault Diagnosis Method Based on Mixed Signal Processing Technology
Symmetry,
Год журнала:
2024,
Номер
16(9), С. 1178 - 1178
Опубликована: Сен. 9, 2024
The
diagnosis
of
bearing
faults
is
a
crucial
aspect
ensuring
the
optimal
functioning
mechanical
equipment.
However,
in
practice,
use
small
samples
and
variable
operating
conditions
may
result
suboptimal
generalization
performance,
reduced
accuracy,
overfitting
for
these
methods.
To
address
this
challenge,
study
proposes
fault
method
based
on
symmetric
two-stream
convolutional
neural
network
(CNN).
employs
hybrid
signal
processing
techniques
to
issue
limited
data.
parallel
(CNN)
analysis
Initially,
data
are
transformed
into
time–frequency
maps
through
utilization
short-time
Fourier
transform
(STFT)
simultaneous
compressed
wavelet
(SCWT).
Subsequently,
two
sets
one-dimensional
vectors
generated
by
reconstructing
high-resolution
features
faulty
using
Feature
splicing
fusion
then
performed
generate
information
assist
classification.
experimental
results
demonstrate
that
proposed
mixed-signal
effective
small-sample
datasets,
verify
feasibility
generality
CNN-support
vector
machine
(SVM)
model
under
conditions.
Язык: Английский