Recent Advances in Electrical & Electronic Engineering (Formerly Recent Patents on Electrical & Electronic Engineering),
Год журнала:
2023,
Номер
17(3), С. 269 - 282
Опубликована: Июль 6, 2023
Background:
Compared
with
traditional
power
generation
systems,
wind
turbines
have
more
units
and
work
in
a
harsh
environment,
thus
relatively
high
failure
rate.
Among
blade
faults,
the
faults
of
high-strength
bolts
are
often
difficult
to
detect
need
be
analyzed
high-precision
sensors
other
equipment.
However,
there
is
still
little
research
on
faults.
Methods:
The
improved
complete
ensemble
empirical
mode
decomposition
(ICEEMD)
model
used
extract
fault
features
from
time
series
data,
then
combined
support
vector
machine
optimized
by
sparrow
search
algorithm
(SSA-SVM)
diagnose
bolt
different
degrees,
so
as
achieve
purpose
early
warning.
Results:
results
show
that
ICEEMD
this
paper
can
signals
well,
SSA-SVM
has
shorter
optimization
accurate
classification
compared
models
such
PSO-SVM.
Conclusion:
hybrid
proposed
important
for
diagnosis
operation
monitoring
class.
Results in Engineering,
Год журнала:
2023,
Номер
17, С. 101004 - 101004
Опубликована: Март 1, 2023
The
failure
mitigation
and
economic
analysis
related
to
the
damage
of
boiler
tube
in
power
plant
system
were
evaluated
present
study.
research
was
conducted
at
Indonesia's
Suralaya
(PP).
built
2011
experienced
a
after
operating
for
less
than
5
years.
This
condition
is
not
common
since
boilers
generally
can
be
used
with
lifetime
approximately
30
In
study,
different
analyses
i.e.,
macro-fractography,
metallography
inspection,
hardness
test,
SEM/XRD
analysis,
hydro
test.
These
tests
investigated
modes,
tube's
mechanical
properties,
assessed
water
feed's
quality.
results
showed
that
caused
by
below-standard
quality
materials
triggered
poor
feed
exhibit
corrosion.
It
proven
high
value
sodium,
conductivity,
silica
content
causes
corrosion
inner
tube,
which
came
out
from
methane
gas.
also
shown
drastically
decreased
wall
strength,
indicated
HRV
179
112
HRV.
brief
study
manufacturers
industries
use
check
material
detailed
specification.
Moreover,
have
cause
loss
burden
many
sectors'
maintenance
operation
costs.
Heliyon,
Год журнала:
2024,
Номер
10(4), С. e25860 - e25860
Опубликована: Фев. 1, 2024
The
advanced
software
used
in
designing
Wind
Turbine
Gearboxes
(WTGs)
does
not
solve
the
premature
failure
of
gearbox
bearings,
which
still
fail
within
5%-20%
their
design
life
by
flaking.
This
issue
increases
maintenance,
downtime,
and
early
replacement
costs
that
limit
investment
wind
energy
field.
majority
previous
research
have
focused
on
bearing
subsurface
investigation
microstructural
changes
associated
with
patterns.
Conversely,
surface
can
elucidate
significant
information
about
loading
levels
contributors
to
failure.
In
this
study,
two
bearings
from
a
planetary
stage
failed
multi-megawatt
turbine
underwent
investigations
analyses.
analyses
include
indentations,
hardness,
roughness,
severe
damage
regions.
study
shows
contact
stress
exceeds
recommended
more
than
compressive
yield
stresses
materials.
distribution
inner
race
during
operation
is
quite
different
theoretical
loading.
transient
loadings
throughout
service
reduce
Gearbox
Bearings
(WTGBs)
life.
Furthermore,
effects
skewing
slipping
been
confirmed.
Accordingly,
the,
lubricant
filtration
system
are
be
improved
extend
fatigue
bearings.
Results in Engineering,
Год журнала:
2022,
Номер
17, С. 100831 - 100831
Опубликована: Дек. 12, 2022
Although
floating
offshore
wind
technology
is
gaining
interest
due
to
its
potential,
the
platform
part
makes
highest
proportion
of
total
cost.
As
a
result,
an
appropriate
selection
necessary
reduce
This
research
identifies
best
system-based
on-site
properties
(wind
resource,
water
depth,
distance
shore,
port,
sea
state,
and
shipping
traffic)
via
Analytical
Hierarchy
Process.
Experts
answered
questionnaire
with
numerical
values
create
pairwise
comparison
for
criteria
alternatives.
Results
show
that
experts
do
not
prefer
Tension
Leg
Platform
complexity
in
installation.
Meanwhile,
most
likely
high-traffic
density
sites
Spar
system.
However,
Semi-submersible
systems
are
proposed
as
alternative
light
traffic
sites.
A
validated
AHP-based
model
simplify
selection.
Results in Engineering,
Год журнала:
2024,
Номер
22, С. 102136 - 102136
Опубликована: Апрель 23, 2024
One
way
clutch
(OWC)
has
emerged
as
one
of
the
most
vital
devices
used
in
heavy
industries
to
safeguard
machines
running
with
prime
movers.
It
acts
a
safety
device
restrict
motion
reverse
direction.
OWC
also
transmits
torque
direction
using
wedge
contact
developed
at
highly
localized
stress
regions.
The
work
presented
consists
development
test
bench
specifically
designed
simulate
transmission
for
estimating
fatigue
life
based
on
accelerated
load
tests.
Accelerated
tests
are
performed
increase
severity
within
short
testing
period.
microstructure
disorder
material
is
reasons
scattering
lives
identical
batches
specimens.
Therefore,
several
experimental
distinct
elevated
levels
different
sizes
OWC.
effect
pressure
and
angle
investigated.
results
obtained
correlate
well
Lundberg-Palmgren
model.
load-life
relationship
follows
Weibull
distribution.
failed
ramp
geometries
studied
scanning
electron
microscope
(SEM)
understand
governing
failure
mechanism
Advances in Science and Technology – Research Journal,
Год журнала:
2024,
Номер
18(1), С. 334 - 348
Опубликована: Янв. 24, 2024
Fatigue
resistance
of
steel
containing
non-metallic
inclusions
(NMIs)
varies
widely,
depending
on
many
criteria;
therefore,
finding
the
most
compromised
types
NMIs
is
a
sober
objective
that
may
significantly
reduce
severe
damage
and
premature
failure
in
applications,
such
as
bearings,
gears,
transmission
shafts,
etc.The
multiple
criteria
decision-making
methodologies
have
been
used
this
study
to
assess
more
effective
NMI
using
analytical
hierarchy
process
by
expert
choice
software.The
five
common
selected
are
oxides,
sulfides,
carbides,
silicates,
nitrides,
based
different
criteria:
size,
shape,
distribution,
mechanical
properties,
quantity.The
results
showed
oxide
optimum
type
relative
other
four
options
regarding
fatigue
about
35%,
probably
due
their
spherical
shape
small
size.The
dominant
criterion
which
an
percentage
34.6%
among
criteria.It
means
reduction
rather
than
enhances
steel.
The
inter-shaft
bearing
is
a
critical
component
in
dual
rotors
aero-engine.
Due
to
the
complex
and
severe
loads
caused
by
interactive
excitation
of
HP
LP
during
operation,
prone
damage
accumulation
failure.
Focusing
on
typical
failure
inner
ring
fragmentation
cannot
be
spliced
together
completely
high
thrust-weight
ratio
turbofan
engine,
this
paper
conducted
morphological
investigation,
fractographic
analysis,
vibration
signal
processing,
finite
element
numerical
simulation,
fully
studied
mechanism
failure.The
results
indicated
that:
there
exists
an
uncoordinated
resonance
speed
rotor
close
proximity
operating
speed.
This
puts
non-synchronous
procession
state,
accompanied
angular
displacement
outer
rings,
which
resulting
lager
rolling
dynamic
load
ring.
further
leads
tangential
impact
at
root
fillet
anti-rotation
pin,
causing
significant
stress
concentration,
eventually
generation
initial
cracks.
These
cracks
persist
propagate
into
fatigue
oblique
fracture
over
time.
After
fracture,
modal
frequencies
become
more
dispersed.
Under
(traveling
wave
load),
nodal
diameter
occurs,
damage,
ultimately
leading
multiple-point
simultaneous
fragmentation.The
investigation
suggests
that
reducing
levels
pin
effective
approach
prevent
can
achieved
through
two
methods:
one
optimizing
structure
decrease
ring,
other
eliminating
appropriately
tightening
torque
compression
nut
interference
between
turbine
rear
journal.
