SpanWidth 10[m] Width of one span
NumSpans 8 Number of spans
TotLength SpanWidth*NumSpans Total length of beam
BeamHeight 0.3[m] Beam height
LoadIntensity 0.1[MPa] Intensity of the pressure load
PulseWidth 2[m] Width of load pulse
PulseSpacing 20[m] Distance between load pulses
LoadSpeed 20[m/s] Velocity of the load pulse
Tstep1 1/(50*f0) Time step limit based on natural frequency
Tstep2 PulseWidth/LoadSpeed/2 Time step limit based on load velocity
Tstep min(Tstep1,Tstep2) Maximum time step
Tend TotLength/LoadSpeed Time when first load pulse reaches beam end
ElemPerSpan max(ceil(SpanWidth/PulseWidth*2),20) Number of elements along a span
f0 sqrt(25e9[Pa]*BeamHeight^2/(12*2300[kg/m^3]*SpanWidth^4))*pi/2 Estimate of first natural frequency
CriticalSpeed f0*2*SpanWidth Estimated critical speed