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:
$\lfloor {M}_{\mathit{jj}}\rfloor =\lfloor {M}_{\mathit{jj}}^{x}\rfloor +\mathit{CK}2*\lfloor {M}_{\mathit{jj}}^{2}\rfloor $
Where,
