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Keywords
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Dynamic Simulation, ADAMS/Rail, Bogie,
Spring Design, Ride Quality Index, Derailment Safety
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Abstract
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This paper presents a novel design procedure
for the springs of wagons with two-stage suspension
system, which satisfies the static, strength, and dynamic
requirements as well as standard preferences. A relatively
precise and detailed method is proposed for modeling the
suspension elements for dynamic simulations. Three
vehicle types are modeled by using the vehicle dynamics
simulation package ADAMS/ Rail, providing details of
the vehicles, bogies, suspension elements, constraints and
kinematic connections. The suspension springs of bogie
MD52 with a 1 m track gauge are modified. The wagons
are subjected to different load conditions. The spring sets
are calculated with the aim of satisfying static
equilibrium condition, kinematic constraints, wagon
height and vertical balance. Finally, the designed springs
are used in simulations and results are compared with the
standard permissible values. Lateral stability (hunting),
critical speeds, safety (derailment ratios) and dynamic
behavior (ride comfort) of each wagon type, subjected to
standard track conditions and irregularities are evaluated
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