Validation of the Tunnel Pressure Signature of the Crossrail Class 345 Train

Subscript _MMR denotes a value from the moving model rig test.

Subscript _FS denotes the value for full-scale conditions.

For any particular combination of train and tunnel, the characteristic pressure transient is known as the tunnel pressure signature.

This paper describes the measurements and analysis that have been carried out to demonstrate that the Class 345 train design meets Crossrail's requirements for the nose pressure rise and friction pressure rise of the tunnel pressure signature to be below clearly specified limits. Compliance with these requirements is necessary to ensure an enhanced level of passenger comfort, and to avoid excessive loading on items of infrastructure such as platform screen doors and tunnel ventilation equipment.