Case Studies in Thermal Engineering,
Journal Year:
2024,
Volume and Issue:
61, P. 104887 - 104887
Published: July 27, 2024
This
work
aims
to
investigate
the
vibration
behavior
of
porous
three-directional
functionally
graded
(3D-FG)
microshells
in
thermal
environments,
where
both
mechanical
and
material
properties
vary
along
three
spatial
directions
following
a
power-law
distribution,
based
on
modified
couple
stress
theory
(MCST).
An
isoparametric
element
is
employed
for
uncoupled
heat
conduction
analysis,
followed
by
dynamic
analysis
using
penalty
solid
with
translation
degrees
freedom
(DOFs)
rotation
DOFs
per
node.
However,
due
strong
nonlinearity
temperature
field
3D-FG
microshells,
obtaining
exact
values
at
integration
points
requires
pretty
dense
mesh
element.
To
overcome
this
issue,
back
propagation
(BP)
neural
network
utilized
predict
various
gradient
indexes,
enhancing
efficiency
precision
distribution
calculation.
Numerical
results
demonstrate
effectiveness
enhanced
finite
model.
Furthermore,
effects
length
scale
parameter
(MLSP),
difference,
indexes
natural
frequencies
are
investigated.
It
shown
that
higher
structural
stiffness
weakens
impact
difference
frequency.
