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Glossary_1 - 2 1 2 1 r r r r z z BASE EXCITATION Force...

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A.K. Slone EG-260 Dynamics (1) ©a.k.slone 2007 1 of 3 EG-260 DYNAMICS I – Glossary Symbol Equation Description Units k stiffness coefficient N/m m mass kg c damping coefficient kg/s c cr mk m c n cr 2 2 = = w critical damping coefficient kg/s e eccentricity m z cr c c damping ratio f n p w 2 1 n T = natural frequency Hz T n w p 2 period of oscillation s w n m k natural angular frequency rad/s w d 2 1 z w w - = n d damped angular frequency rad/s w angular frequency rad/s r n r w w = frequency ratio
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