setting equivalent viscous damping in Response dynamics like in SOL109,112
Solution
Critical damping in Nastran is the same as viscous damping in Simcenter Response Dynamics. The overall structural "G" damping is Nastran (in simcenter interface SOL 109 bulk section; sol 112 case section ) is just a different unit of damping so G=0.04 is the same as CRIT=0.02.
Notes