Parameter

Values

Description

WR4

<Real>

Default = 0.0

This parameter is used to include or exclude frequency dependent damping in rotor dynamics analysis.

PARAM, WR4, <Real>

If any real value except 0.0 (default) is specified, then it is included in the rotor dynamics equation as the “average” excitation frequency. PARAM, WR4, <Real> should be specified to activate frequency dependent damping if PARAM, GYROAVG is set to -1.

PARAM, WR4, 0

If 0.0 is specified, then frequency dependent damping terms are not included in rotor dynamics analysis.

Refer to Rotor Dynamics in the User's Guide for more details.