1D MoC Aerodynamics Β· High-Speed Rail
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πŸš„ 1D Tunnel Aerodynamics β€” MoC Solver

Dayman & Vardy (1979) Β· Vardy (2008) Β· Arup/FRA (2022)

Tunnel

m
mΒ²
m
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Train

m
mΒ²
m
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km/h
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s

Atmosphere

K
Pa

Relief Shafts β“˜

Solver

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s
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m
m

Multi-Train β“˜

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s

Session β“˜

Runs β“˜

Current run:
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Recent runs:
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Results
Diagnostics

Pressure Distribution Along Tunnel β€” Dynamic Time View

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t = 0.0000 s | mass error: 0.000%

Pressure–Time at Tunnel Positions

Positions (m):

Cabin vs External Pressure (at train nose & tail)

Velocity–Time at Tunnel Positions

Positions (m):

MPW Amplitude vs Distance from Portal

Mass Conservation Error vs Time

Max |Pressure| at Entry & Exit Portals vs Time

Monitors whether boundary conditions inject or leak energy.

Rate of Change dp/dt at Exit Portal

Key input for MPW estimation.

Total Kinetic Energy in Tunnel vs Time

Should rise during entry, oscillate, decay after exit.

Solver Confidence Summary