Motorised boom barrier: which shock absorber?

40 kg boom, 60 N·m drive, 1.5 m/s at the stop. Watch the 39-second explainer, check the calculation, then open the same example in ImpactCal and change it to your own machine.

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Inputs (SI units)

Mass m	40 kg
Velocity v	1.5 m/s
Torque M	60 N·m
Torque radius r	0.5 m
Cycles C	200 /h

Calculation

Kinetic energyE1 = m·v²/6 = 40·1.5²/6	15 J
Drive energyE2 = (M / r)·s = (60 / 0.5)·0.020	2.4 J
Energy per cycleE3 = E1 + E2	17.4 J
Energy per hourE4 = E3·C = 17.4·200	3 480 J/h
Effective massme = 2·E3 / v²	15.5 kg

s = stroke of the selected model · g = 9.81 m/s²

ImpactCal selection

AC-20-20

Best-centred utilisation

Stroke20 mm

Stopping force1.09 kN

Deceleration70.3 m/s²

Stopping time0.033 s

Open this example in ImpactCalSize my own application