The
high pitched squealing noise many
trains make as they negotiate a curve
can be intensely irritating to both
passengers and local residents. As
a result, noise control is a subject
of considerable interest to many railway
operators as well as to their stake
holders. Squealing wheels can be unpleasant
for passengers either in the car or
on the station platform.
There
are many different sources of noise
from trains, such as engines / motors
etc. There are two primary sources
of noise from the interface of the
rail and the wheels. These are so-called
"rolling noise" present
in tangent (straight) track, and wheel
squeal, which is mainly present in
curves. Although rolling noise receives
a great deal of attention because
the majority of track is straight,
wheel squeal can be a particular problem
because the high pitched noise is
particularly irritating to the human
ear.
Wheel
squeal is related to frictional instability
between the wheel tread and the top
of the rail, as the fixed axles of
the cars negotiate a curve. Although
contact between the wheel flange and
the rail can contribute to noise,
it is not usually the source of wheel
squeal, a fact that is often not understood
by rail operators. The frictional
instability is manifested as roll-slip
oscillations between the wheel tread
and the top of the rail. The web of
the wheel in turn amplifies these
oscillations. It is the vibrations
of the wheel web that are actually
heard by the human ear.
Rolling
noise is to a large degree related
to the roughness of the wheel and
the rail.
Noise Solutions
Top of
Rail Friction Control
 
Transit
Intelligent
Trackside/Wayside Top-Of-Rail Friction
Control System
 Kelsan®
KELTRACK® Liquid
Top-Of-Rail Friction Modifier
Portec Rail Protector®
IV Trackside
Top-Of-Rail Application System
 
Freight
Intelligent
Trackside/Wayside Top-Of-Rail Friction
Control System
Kelsan®
KELTRACK® Liquid
Top-Of-Rail Friction Modifier
Portec Rail Protector®
IV Trackside
Top-Of-Rail Application System
 
Transit
OnBoard
Transit Top-Of-Rail Friction Control
System
Kelsan®
HPF (High Positive Friction) Solid
Stick Top-Of-Rail Friction Modifier
 
Freight
Hi-Rail Vehicle Mounted
Intelligent
Hi-Rail TOR Friction Control System
Kelsan®
KELTRACK® Liquid
Top-Of-Rail Friction Modifier
Portec Rail
Road-Runner® 361
Hi-Rail™ Top-Of-Rail Application
System |
