# Forced harmonic vibration
# Scope: Harmonic force on damped SDOF system; steady-state displacement amplitude.
# Status: illustrative worked example; engineering review pending.
# Inputs are example values. Checks are editable example requirements, not standards.

force = 1 N
stiffness = 1000 N/m
ratio = 0.8
damping = 0.1

amplitude := force/stiffness/sqrt((1-ratio^2)^2+(2*damping*ratio)^2) [mm]

check amplitude budget: amplitude <= 3 mm

scenario alternative: force = 0.8 N