TABLE OF CONTENTS | a | coefficients with subscripts flexibility acceleration, m/s 2 (ft/s 2) | |
| A | area of cross section, m (in 2) constant | |
| B | constant | |
| C | coefficient of viscous damping, Ns/m or N/v (lbfs/in or lbf/v) constant | |
| C c | critical viscous damping, Ns/m (lbfs/in) | |
| C t | coefficient of torsional viscous damping, N m s/rad (lbf in s/rad) | |
| C 1, C 2 | coefficients constants | |
| d | diameter of shaft, m (in) | |
| D | flexural rigidity [= Eh 3/12(1 ? v 2)] | |
| e | displacement of the center of mass of the disk from the shaft axis, m (in) | |
| E | modulus of elasticity, GPa (Mpsi) | |
| f | frequency, Hz | |
| F | exciting force, kN (lbf) | |
| F o | maximum exciting force, kN (lbf) | |
| F T | transmitted force, kN (lbf) | |
| g | acceleration due to gravity, 9.8066 m/s 2 (32.2 ft/s 2 or 386.6 in/s 2) | |
| G | modulus of rigidity, GPa (Mpsi) | |
| h | thickness of plate, m (in) | |
| i | integer (=0, 1,2,3, ) | |
| I | mass moment of inertia of rotating disk or rotor, N s m (lbf s 2 in) | |
| J | polar second moment of inertia, m 4 or cm 4 (in 4) | |
| k | spring stiffness or constant, kN/m (lbf/in) | |
| k e | equivalent spring constant, kN/m (lbf/in) | |
| k t | torsional or spring stiffness of shaft, J/rad or N m/rad (lbf in/rad) | |
| K | kinetic energy,... |
