# PARAM, CM2

Bulk Data Entry Scale factor for direct input mass matrices.

Parameter Values Description
CM2 <Real>

Default = 1.0

CM2 specifies factors for the direct input mass matrix. The total mass matrix is:
$⌊{M}_{\mathit{jj}}⌋=⌊{M}_{\mathit{jj}}^{x}⌋+\mathit{CK}2*⌊{M}_{\mathit{jj}}^{2}⌋$
Where,
$⌊{M}_{\mathit{jj}}^{2}⌋$
Is selected in the Subcase Information command M2GG.
$⌊{M}_{\mathit{jj}}^{x}⌋$
Is generated from the mass element entries in the Bulk Data section.