3. Calculation of Rail Stress

　

3-1 β = 20.8 a = 76.9 cm

Mγ = 76.9 cm x 1658 kg = 127500 kg-cm

σγ = Mγ /Z = 127500/313 = 407.3 kg/c?u

speed impact coefficient i = 1 + 0.01 V = 1.75 (Vmax = 75km/h)

407.3 x 1.75 = 713 kg/c?u

　

3-2 β = 26.0 a = 71.4cm

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