When train passes through the rail joint at the heel of tongue rail of railroad
switch
, impact vibration is caused due to the step difference of the joint. This impact vibration is transmitted to the front rod, which is the attachment device located on the toe of tongue rail and connected with position checker device, induces the wear of bearing and leading to switching failure. Also, the wear of bearing of the special layout
switch
is more serious than that of the normal railroad
switch
because the special layout
switch
is more complex than the normal railroad
switch
. In order to clarify the mechanism of the wear, we measured the acceleration and axial force of the front rod of the special layout railroad
switch
in track open for traffic. Then, we have developed the finite element model of the special
switch
and validated the model by comparing with measured results. On the other hand, we calculated the coefficient of wear amount of bearing from wear test. Combining with the results of finite element analysis and the coefficient of wear amount, we predicted the wear amount of the front rod in the track. The wear amount of bearing of the special railroad
switch
is 10 to 20 times more than that of the normal railroad
switch
(Kondo et al., 2015). This is because the material of bearing of special
switch
is easier to wear than that of normal
switch
. Furthermore, the result is attributed to the structure of bearing of special
switch
. The axial constraint of bearing of special
switch
is weaker than that of normal
switch
, and so the bearing of special
switch
is easy to slide.
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