高速列車のトンネル突入による衝撃波発生に関する実験 (<小特集>衝撃波現象とその工学的応用)

概要

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An experimental study of shock waves generated by high speed train entry into a tunnel was conducted using a scaled tunnel simulator. The scaled tunnel simulator consisted of a 25-m-long tube of 40 mm diameter and a launcher. A 200-m-long plastic cylinder of 18 mm diameter represented a scaled train model which was launched with velocities ranging from 50 to 120 m/s. The scaled tunnel simulator was tilted 8 degrees from the floor, thereby preventing train model deceleration due to friction between the tube wall and the plastic cylinder. A simple compression wave was generated at the entrance of the tunnel simulator. When the train model velocity was high, the compression wave became a shock wave. The shock wave built up in the tube was visualized by holographic interferometry. It is concluded that the present scaled tunnel simulator is useful for simulating shock wave generation accompanying the increase in train velocity.
社団法人日本機械学会の論文
1994-07-25