Alpha |
The mass proportional damping factor; this factor tends to have a
stronger effect at lower frequencies. |
Beta |
The stiffness proportional damping factor; this factor tends to
have a stronger effect at higher frequencies. |
Structural |
The structural damping factor. Use this factor only when the
displacement and velocity are exactly 90° out of phase; otherwise, it should be zero.
Structural damping assumes that the damping forces are proportional to the forces
caused by stressing of the structure and are opposed to the velocity. |