Vibration from a Railway Tunnel Predicted by Coupled Finite Element and Boundary Element Analysis in Two and Three Dimensions

摘要

In the present paper a cut-and-cover railway tunnel with realistic geometry and material parameters is examined. The vibration transmission from the tunnel floor to the ground surface is analysed for the frequency range relevant to the perception of whole body vibration (40 to 80 Hz). A coupled finite element and boundary element scheme is used in both two and three dimensions. Since a two-dimensional model uses much lower computing resources than a three-dimensional model, the reliability of information that can be gained from a two-dimensional model rather than a three-dimensional one is investigated.