Oct 01, · damping are really just mathematical artifices that allow the use of normal mode theory. That relationship in the ANSYS docs between damping ratio, frequency, alpha and beta defines a frequency dependent damping ratio. For alpha = 0 the damping ratio increases with frequency. You plug in a value for beta at a given frequency to match the damping. Because a modal analysis assumes no damping, no damping data is obtained doing the FEM (modal) analysis. To approximate a small amount of material damping we apply a little modal damping of 1% relative modal damping (ξ). For larger amounts of damping the shape of the eigenvectors changes and the undamped approximation becomes less accurate. zMost damping in an ANSYS dynamics analysis is approximated as someMost damping in an ANSYS dynamics analysis is approximated as some form of viscous damping: F =Cx&. zThe proportionality constant c is called the damping constant.

# Frequency dependent damping ansys

Harmonic response analysis with Ansys Workbench, time: 4:03

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