PARAM, MDK4OPT

Bulk Data Entry Controls the internal calculation of material damping when different material damping values (GE on MATx) are specified for different regions in a model.

Parameter	Values	Description
`MDK4OPT`	<0, 1> Default = 1	Controls the internal calculation of material damping when different material damping values (`GE` on MATx) are specified for different regions in a model. This internal change may improve computational speed. 1 The value of PARAM, G is internally set equal to the most common value of `GE` for structural elements in the model, to speed up the calculation of material damping. The `GE` values (new `GE` values) of the rest of the elements in the model are correspondingly set such that the totals (PARAM, `G` + new `GE` value) are equal to the initially specified values. 0 The traditional material damping calculation is used.