dampedFrequency method
Computes the damped frequency ωd = ω₀·√(1 - ζ²) for under-damped systems. Returns null for critical or over-damped systems.
Implementation
double? dampedFrequency({
required double mass,
required double stiffness,
required double zeta,
}) {
if (zeta >= 1.0) return null;
final omega0 = naturalFrequency(mass: mass, stiffness: stiffness);
return omega0 * math.sqrt(1.0 - zeta * zeta);
}