| 摘要 |
PROBLEM TO BE SOLVED: To provide a tunnel shock absorbing work capable of optimally reducing a microbarometric wave, when operating a train having a different forefront part shape, without lengthening the length of a hood part. SOLUTION: In this tunnel shock absorbing work, the hood part 10 is arranged in a tunnel entrance 2. Since a compression wave generated by the hood part 10 branches off, reflects and interferes by a pipe part 20 by arranging the communicating pipe part 20 in the hood part 10 by projecting outward from the hood part 10, a pressure gradient of the compression wave can be moderated, and even when increasing a speed of the train dashing in a tunnel 1, the microbarometric wave generated in a tunnel 1 exit can be reduced by reducing the pressure gradient of the compression wave reaching the tunnel entrance 2 without lengthening the length of the hood part 10. COPYRIGHT: (C)2005,JPO&NCIPI
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