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NX Nastran DMAP Programmer's Guide - Kxcad.net

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RBMG4 Computes rigid body mass matrix<br />

Computes the rigid body mass matrix.<br />

Format:<br />

RBMG4 DM,MLL,MLR,MRR/<br />

MR $<br />

Input Data Blocks:<br />

DM Rigid body transformation matrix for the r-set to the l-set.<br />

MLL Mass matrix reduced to the l-set.<br />

MLR Mass matrix partition (l-set by r-set) from MTT.<br />

MRR Mass matrix partition (r-set by r-set) from MTT.<br />

Output Data Blocks:<br />

MR Rigid body mass matrix (r-set by r-set)<br />

Parameters:<br />

None.<br />

Remark:<br />

The rigid body mass matrix is computed from:<br />

MR<br />

= DM T<br />

DM DM T<br />

+ + +<br />

Mll DM<br />

M rr<br />

M lr<br />

M lr<br />

T<br />

RBMG4<br />

Computes rigid body mass matrix<br />

Eq. 4-22<br />

132

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