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Damping Formulation

Theory

The structure damping matrix is by default computed at each solution step based on the instantaneous mass and stiffness matrices, and this known as the Updated damping formulation in program terminology. Alternatively, a constant formulation may be invoked, in which case damping matrix remains constant throughout the analysis, based on the mass and stiffness matrices at the static equilibrium position (that is, the position at the start of the dynamic analysis).

Relevant Keywords

•*DAMPING FORMULATION is used to specify the damping formulation to be used in a time domain dynamic analysis.