Numerical and in-situ investigation on bilateral double-wall barriers in mitigating metro train-induced vibrations
Construction and Building Materials,
Год журнала:
2025,
Номер
469, С. 140502 - 140502
Опубликована: Фев. 25, 2025
Язык: Английский
Prediction of high-speed railway vibration signal and its wave field energy characteristics in viaduct site based on simplified source mechanical model
Journal of Vibration and Control,
Год журнала:
2025,
Номер
unknown
Опубликована: Апрель 21, 2025
This
paper
proposes
a
simplified
seismic
source
mechanics
model
for
predicting
high-speed
railway
vibration
signals
in
viaduct
sites
and
further
analyzes
the
frequency
spatial
energy
characteristics
of
wave
field
based
on
numerical
simulation.
The
method
effectively
reduces
prediction
time
environmental
trains.
It
aligns
more
with
actual
than
existing
model.
First,
is
established
by
equating
mobile
train
as
force
excited
multiple
bridge
piers
delayed
excitation;
subsequently,
distribution
site
are
reflected
Finally,
time-domain
frequency-domain
simulated
railroad
verified
on-site
monitoring
tests.
Overall,
this
new
can
be
applied
to
rapid
trains
site,
small
computational
workload,
used
assessment
other
fields,
which
improves
efficiency
under
premise
ensuring
accuracy
signal
characteristics.
Язык: Английский
Vibration isolation performance of quasi constant natural frequency isolation pads associated with test verification
Engineering Structures,
Год журнала:
2024,
Номер
324, С. 119328 - 119328
Опубликована: Ноя. 21, 2024
Язык: Английский
High-Speed Train-Induced Vibration of Bridge–Soft Soil Systems: Observation and MTF-Based ANSYS Simulation
Buildings,
Год журнала:
2024,
Номер
14(8), С. 2575 - 2575
Опубликована: Авг. 21, 2024
In
this
paper,
a
multi-transmitting
formula
(MTF)
was
integrated
into
ANSYS
software
through
secondary
development,
enabling
dynamic
finite
element
simulation
of
wave
propagation
in
infinite
domains.
The
numerical
reliability
and
accuracy
the
MTF
were
verified
plane
problem
involving
homogeneous
elastic
half-space,
as
well
3D
scattering
source
problems
three-layered
soil
site.
Additionally,
comparative
analysis
various
artificial
boundaries
conducted
to
highlight
advantages
MTF.
Field
observations
environmental
vibrations
caused
by
high-speed
railway
operations
revealed
localized
amplification
along
depth
direction
at
Kunshan
segment
Beijing–Shanghai
railway.
Based
on
these
observations,
series
analyses
using
customized
with
investigate
underlying
causes
mechanisms
phenomenon,
spatial
variation
characteristics
foundation
induced
bridge
during
train
operations.
This
study
reveals
mechanism
which
combined
effect
piles
soft
layers
influences
peak
ground
accelerations
site
vibrations.
It
also
demonstrates
that
presence
piers
pile
foundations
effectively
reduces
vibration
intensity
vicinity
railway,
playing
crucial
role
mitigating
Язык: Английский