Research Square (Research Square),
Journal Year:
2022,
Volume and Issue:
unknown
Published: Aug. 5, 2022
Abstract
Digging
in
hilly
regions
is
an
important
measure
to
promote
afforestation
on
difficult
sites.
In
view
of
the
working
conditions
build
fish-scale
pit
slope,
auger
mechanism
soil
lifting
and
throwing
was
investigated
this
study.
This
study
utilized
EDEM
software
establish
operation
model
earth
conduct
DEM
(Discrete
Element
Method)
virtual
simulation
experiments.
A
quadratic
rotating
orthogonal
center
combination
test
implemented
by
setting
efficiency
conveying-soil
(Y1)
distance
throwing-soil
(Y2)
as
evaluation
indices.
Variance
analysis
response
surface
optimization
were
performed
experimental
data.
The
results
indicated
that
weight
factors
affecting
Y1
Y2,
feeding
speed
>
helix
angle
slope
angle,
angle.
optimal
parameter
each
influencing
factor
obtained.
Among
them,
when
preparation
required,
operating
was:
Slope
26.467°,
Helix
21.567°,
Feeding
0.1
m/s,
Rotating
67.408
r/min.
research
provides
theoretical
references
for
design
regions.
Agriculture,
Journal Year:
2023,
Volume and Issue:
13(3), P. 541 - 541
Published: Feb. 23, 2023
In
agricultural
machinery
design
and
optimization,
the
discrete
element
method
(DEM)
has
played
a
major
role
due
to
its
ability
speed
up
manufacturing
process
by
reducing
multiple
prototyping,
testing,
evaluation
under
experimental
conditions.
field
of
soil
dynamics,
DEM
been
mainly
applied
in
optimization
soil-engaging
tools,
especially
tillage
tools
furrow
openers.
This
numerical
is
able
capture
dynamic
bulk
behaviour
soils
soil–tool
interactions.
review
focused
on
various
aspects
application
simulation
opening
for
tool
optimization.
Different
contact
models,
particle
sizes
shapes,
calibration
techniques
determining
input
parameters
research
have
reviewed.
Discrete
predictions
profiles,
disturbed
surface
failure,
loosening,
disturbance
parameters,
reaction
forces,
types
modelled
with
also
highlighted.
pool
information
consolidates
existing
working
approaches
used
prior
studies
helps
identify
knowledge
gaps
which,
if
addressed,
will
advance
current
dynamics
modelling
capability.
Agriculture,
Journal Year:
2023,
Volume and Issue:
13(2), P. 305 - 305
Published: Jan. 27, 2023
Due
to
their
(a)
lower
draught
force
requirements
and
(b)
ability
work
at
deeper
operation
depths
faster
speeds,
disc
ploughs
have
gained
interest
in
Australia.
A
modified
version
of
the
plough
that
involves
removing
every
second
fitting
larger
often
more
concave
discs
has
become
popular.
However,
development
one-way
is
its
infancy,
a
detailed
analysis
required,
particularly
on
soil
movement.
Historically,
movement
soil–tool
interactions
conducted
using
empirical
methods.
experimental
tests
are
resource
labour
intensive.
When
tool
interaction
can
be
accurately
modelled,
efficient
tools
designed
without
performing
expensive
field
tests,
which
may
only
undertaken
certain
times
year.
This
study
modelled
between
discrete
element
method
(DEM).
As
passive-driven
tool,
rotational
speed
was
DEM-MBD
(multi-body
dynamic)
coupling.
The
results
show
coupling
predict
with
maximum
relative
error
6.9%,
good
correlation
obtained
DEM-predicted
actual
(R2
=
0.68).
Agriculture,
Journal Year:
2022,
Volume and Issue:
12(4), P. 511 - 511
Published: April 4, 2022
In
order
to
solve
the
problems
of
blocking
drainage
ditch
and
reducing
soil
flatness
caused
by
accumulation
when
using
compound
planter
with
plowshare
ditch,
a
spiral
separation
mechanism
(SSSM)
is
designed.
The
SSSM
analyzed.
obtain
optimal
parameters
SSSM,
based
on
discrete
element
method,
multifactor
test
carried
out
embedded
depth,
pitch,
rotation
speed
blade
as
factors
distance
uniformity
evaluation
index.
are
depth
49
mm,
pitch
331
318
r
min−1.
field
experiment
these
parameters,
900
mm
standard
deviation
height
7.8
which
consistent
simulation
results.
No
blockage
was
found,
shows
that
this
device
can
effectively
problem.
This
study
provide
reference
for
design
equipment
device.
Agriculture,
Journal Year:
2023,
Volume and Issue:
13(1), P. 206 - 206
Published: Jan. 13, 2023
There
is
a
rising
interest
amongst
Australian
farmers
to
use
disc
seeders
due
their
ability
operate
in
high
residue
conditions
and
at
higher
speeds,
commonly
the
range
of
12
15
km
h−1.
This
paper
reports
on
developing
an
analytical
discrete
element
method
(DEM)
force
prediction
model
suited
rotating
flat
blade
operating
different
sweep
tilt
angles.
To
validate
models,
field
experiments
were
carried
out
with
two
angles
0
20°
four
6,
26,
45
90°
sandy
soil.
An
approach
was
developed
following
experimental
investigation
that
showed
only
forward
portion
actively
involved
generating
soil
failure,
while
magnitude
this
active
soil-disc
interface
varied
angle.
The
predicted
proportions
correlated
well
observations.
As
applying
affects
direction
movement
relative
face,
directions
friction
resultant
forces
determined.
equation
acceleration
adapted
account
for
Results
fits
relatively
measured
data
90,
26°
angle,
low
correlation
between
6°
angle
scrubbing
reaction
not
accounted
model.
also
better
coefficient
determination
(R2
=
0.93)
obtained
DEM
vs.
test
results
compared
predictions
0.86),
particularly
predicting
side
forces.
It
found
from
study
both
enabled
acting
blade,
which
can
assist
optimising
design
lower
specific
resistance.
PLoS ONE,
Journal Year:
2023,
Volume and Issue:
18(11), P. e0293750 - e0293750
Published: Nov. 3, 2023
In
order
to
study
the
dynamic
interface
mechanical
behavior
between
soil
and
agricultural
machinery
reveal
causes
of
tillage
resistance,
three
kinds
bionic
furrow
opener
were
designed
according
characteristics
earthworm
head
surface
curve,
using
discrete
element
method
simulate
analyze
process
openers.
The
results
showed
that
ditching
resistance
from
large
small
is
traditional
opener,
corrugated
ridgeline
composite
opener.
With
same
speed,
drag
reduction
effect
openers
increases
with
increase
depth.
During
increasing
depth
30
mm
60
90
mm,
increased
11.56
N
28.32
48.61
as
well
maximum
ratio
5.58%
7.20%
8.93%
for
depth,
reached
highest
rate
all
when
speed
100
mm/s,
value
9.08%.
width
ditch
smaller
than
Bionic
can
improve
height
reduce
width,the
structure
creates
a
gap
core
particles,
reducing
number
contact
area
particles.
particles
has
smallest
force
field
disturbance
caused
by
share
small,
evenly
distributed
along
surface.
simulation
shows
effectively
quality
ditching,
which
provides
theoretical
basis
subsequent
research
optimization.
