Rail Dampers

s Rai lway com pon e nts
s n o i s e c o ntr o l
Rail Dampers
Innovative Noise Mitigation
Innovative Noise Mitigation
on Railways
Rail dampers are based on the latest
technologies to reduce broadband
railway noise at its source. The vibration level within the rail during a train
passing by will be damped.
Rail dampers are based on the latest technologies
Totoachieve
maximum
noise
reduce broadband
railway
noise atreduction,
its source.
dampers
need
bethe
adapted
the
a train
The vibration
level to
within
rail duringto
individual
shape
of
a
rail
at
first
(e.g.
passing by will be damped.
115RE or 119RE).
Vibration
of rail
Vibration
of rail
To achieve maximum noise reduction, dampers
In the next step dampers are mounted
need to be adapted to the individual shape of a
on various tracks including on a test track in our laboratory. A
rail at first (e.g. UIC 60).
> 350,000 assembled passing train is simulated by exciting
rail dampers in Europe the rail with a special shaker.
Different measurements
proved an average noise
reduction of 2-6 dB(A).
In the next step dampers are mounted on a
test track
in our laboratory.
A passing
train is
Finally
dampers
are tuned
to reduce
simulatednoise
by exciting
thepossible
rail with a special
shaker.
emitting
best
at corresponding frequency range.
Test track in our laboratory
Finally dampers are tuned to reduce emitting noise
Performance of different rail
dampers during various
passing trains
The
tuning of dampers
enapossible at corresponding
bestindividual
frequency range.
bles application on all kinds of tracks
such
as ballasted
The individual
tuning oftrack,
dampersballastless
enables applicatrack
and
high
speed
tracks.
tion on all kinds of tracks such as ballasted track,
ballastless track and high speed tracks.
Performance of different rail
dampers during various passing trains
Source: Stieglitz/Czolbe:
Tuned Dampers assembled on ballast track
Source: Stieglitz/Czolbe:
„Effectivity of rail dampers“,
„Effectivity of rail
dampers“,
SpeechAG
DAGA
Speech DAGA
2012, Prose
2012,Prose AG
Tuned Dampers on ballasted track
Schrey & Veit
Tuned Dampers on ballastless track
Tuned Dampers on ballastless track
Kampa-International INC
71 Stevenson St. Suite 400 PMB# 95382
CA 94105, San Francisco, USA
Installation of Rail Dampers
Assembly of rail dampers is easy, even on ballasted and non-ballasted tracks
First need to be checked if a minor
quantity of the ballast has to be
removed. At the same time the rail
dampers can be distributed on the
track and assembly can start right
away.
Rail dampers are aligned mechanically. The dampers will be installed by
clamping the dampers to the rail by
using a spring or by using a clamp
device. The bolts are tightened by a
motor driven sleeper screw driver and
can easily be dismantled that way (e.g.
change of rails). The springs can be
easily installed by a leverage tool.
It takes an average manpower of 14
track workers to assemble 300 m/
hour (track).
By deploying 3 teams of that size an
average output of 1,000 meters/hour
is possible.
In case of a rail replacement the
dampers can be dismantled quickly,
put aside the track and reinstalled on
the new rail.
Installed systems:
> 650,000 in Europe
> 13,000 in the US
Test tracks:
> 10,000 (Switzerland,
Belgium, Denmark,
France, USA , Australia
• Rai lway com pon e nts
• n o i s e c o ntr o l
and Kuala Lumpur
• Rai lway com pon e nts
• n o i s e c o ntr o l
Maintenance and LCC
Based on their components, rail
dampers have a long life cycle and
need no maintenance. After the wear
limit dampers can be easily dismounted and recycled.
Rail grinding does not interfere with
rail dampers since their components
are heat resistant. Tamping machines
can also operate without interference.
Tamping machine
Rail grinding
creative ar ts | Mainz | www.crea-a rts.d e
Rail Vibration Damper Effectiveness at Retarding Corrugation Growth
The figure shows the growth of corrugation with rail dampers was dramatically less than observed
without rail dampers.
• Rai lway com pon e nts
• n o i s e c o ntr o l
• Rai lway com pon e nts
• n o i s e c o ntr o l
KamPa International Inc.
71 Stevenson Street, Suite 400 PMB# 95382
CA 94105, San Francisco
Phone: +1 415 655 6770
[email protected]