bogies_polach:Layout 1 20/5/08 09:31 Page 4
BOGIES
divergences at the critical speed from
20km/h to 70km/h. The stability
assessment can be carried out by way of
various linear and non-linear methods.
Our bogie experts have completed various
examinations in order to compare the
individual methods and influence
parameter
4,5
with the objective of
harmonising the company’s internal
stability assessment guidelines. With the
cooperation of our dynamic specialists in
the Working Group 10 of CEN/TC256
Figure 3: Lateral accelerations (rms-values) on the floor of car bodies as a result of simulation at a
speed of 160km/h. Increased gauge leads to very low conicity and hence to a deterioration of ride
and the Working Group Dynamics of
characteristics
UNIFE, these findings support the
enhancement of the European standards soft axle guidance are better suited for curving can be achieved by the application
regarding assessment of stability and curved track, whereas good stability of mechatronics, which will enable a
wheel-rail contact geometry. performance can be achieved with stiff significant simplification of the
axle guidance. The trade-off between mechanical bogie parts and dispense with
Curving performance stability and curving together with a the yaw dampers. Bombardier
Another technological challenge possible enhancement by an application of Transportation plays a pioneering and
concerning bogies is the trade-off between a coupling mechanism between the leading role in the development of this
running stability and curving performance. wheelsets are presented in
6
. The self new modern technology
7,8
.
Longitudinally soft axle guidance allows steering bogies, however, are sensitive to The curving performance of powerful
self steering of wheelsets, leading to differences in the wheel and rail profiles as locomotives and tractive rolling stock can
reduced angle of attack and track loading demonstrated by simulation results be influenced by the tractive effort, mainly
(reduced guiding force between wheel and presented in Figure 6 on page 81. under low adhesion conditions (e.g. wet
rail in lateral direction) as well as lower An even better solution regarding the rail). To simulate the running dynamics of
levels of wear. Consequently, bogies with conflict of objectives between stability and locomotives at the adhesion limit
Projects on track
PROSE‘s engineering department took the challenge to develop
and design the ambitious motor and trailer bogies for the
PROTOS EMU, featuring a very low interface to the carbody and
PROSE Ltd.
a bogie mounted forced air ventilation for the traction motors.
Zuercherstrasse 41
PROSE‘s accredited test laboratory performed the running
8400 Winterthur / Switzerland
Phone +41 (0)52 262 74 00
dynamics, brake, noise and EMC testing of the PROTOS EMU in
Fax +41 (0)52 262 74 01
the Netherlands.
www.prose.ch
You pose the problem, we take the challenge!
info@prose.ch
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