damping ratio

damping ratio (plural damping ratios)

1. (physics, mathematics) A dimensionless measure of the damping in second-order linear dynamic system, appearing as the term ${\displaystyle \zeta }$ in the generalised equation of motion for such a system, ${\displaystyle {\ddot {q}}+2\zeta \omega _{n}{\dot {q}}+\omega _{n}^{2}q=F.}$

• undamped
• damped
• underdamped
• critically damped
• overdamped