Interior explosive sound caused when a train encounters a compression wave inside a long slab-tracked tunnel

摘要

When a high-speed train encounters a compression wave with steep wavefront inside a tunnel, an explosive sound can be caused within the train. In this study, on-track measurements of the interior explosive sound within the train and the tunnel compression wave outside the train were conducted. Also numerical analyses were conducted for examining a countermeasure for reducing the explosive sound. The results show that the interior explosive sound becomes larger with the increase of the pressure gradient of therncompression wavefront.