CWR Track Vibration Characteristics Varying
With The Change Of Supporting Condition
Author(s)
L. Li & Y. Luo
Abstract
Stress contained in rails, mainly due to thermally-induced expansion and
contraction, results in large longitudinal loads which lead to broken rails and
track buckling. According to the beam bending theory of structural dynamics
with a consideration of the influence of axial load, a test method to measure the
longitudinal force in CWR is introduced. This paper studied the elements which
will affect the results used in this method such as the total calculation and
measurement length of rail, unsupported length of rail. Standard relation curve
between longitudinal force and first order frequency was provided. To the actual
continuous welded rail, longitudinal force can be calculated according to the
standard relation curve after the vibration response frequency of rail in some
state is measured. This method would help to evaluate and measure the force in
rail caused by temperature change.
Keywords: continuous welded rail (CWR), buckling, stability, natural frequency,
vibration characteristics.
Keywords
continuous welded rail (CWR), buckling, stability, natural frequency,
vibration characteristics
Related Book
Other papers in this volume
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