Abstract
Impact noise occurs when a train passes through the section of discontinuous rail. It is one of the sources of the environmental problem of railway traffic. Therefore, the characteristics of impact noise have been investigated using the measurement results obtained both static test and running test. In this paper, an attempt is made to evaluate the vibration properties of the rail and wayside noise at two rail joints. The result shows that the frequency characteristics of the rail vibration and wayside noise at each rail joint are different. One reason is that the wheel/rail contact force is different from each other. Furthermore, the relationship between the wheel/rail contact force and the displacement of the wheel axle which is derived from a profile shape of jointed rails is investigated.
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