Effect of Train Under-Gap on the Entry Compression Wave in a High-Speed Railway Tunnel

초록

The pressure signature of a train has been studied and later the changes in the pressure signature due to change in train speed has been explained using pressure plots and contours. Howe et al.[1] conducted investigations on the effect of an optimally flared portal and has validated that a gradually decreasing entry portal can counter the effect of non-linear sleeping in a long tunnel. the initial thickness of the compression wave decreases with the increasing train mach number(i.e. t~1/M)