抄録
When a railway train passes over discontinuities on a rail, e.g. rail joints, the discontinuities induce large interaction forces on both wheel and track. Consequently, impact noise is generated impulsively and is much greater than rolling noise. In this paper, an attempt is made to understand impact noise generation mechanism theoretically. Using the measurement results obtained through both static tests and field tests, a prediction model is developed. By using the model, the overall trends in noise are well predicted. Also, the model gives an estimate of the contributions of wheel, rail and sleeper to the total impact noise at the joint.
