Block Format Keyword Assign additional non-structural mass to nodes or a group of nodes. Optionally the total additional non-structural mass of a part or a group of parts can be defined (applied to shells and solids only) or a surface mass can be assigned to a surface and Radioss would then compute the added node based mass value using area (volume) - weighted distribution.

## Format

(1) (2) (3) (4) (5) (6) (7) (8) (9) (10)
If type = 0 or 1
(1) (2) (3) (4) (5) (6) (7) (8) (9) (10)
Mass grnd_ID
If type = 2
(1) (2) (3) (4) (5) (6) (7) (8) (9) (10)
Mass/Area surf_ID
If type = 3 or 4
(1) (2) (3) (4) (5) (6) (7) (8) (9) (10)
Mass grpart_ID IFLAG
If type = 5
(1) (2) (3) (4) (5) (6) (7) (8) (9) (10)
Mass1 node_ID1
Mass2 node_ID2
etc etc
MassN node_IDN
If type = 6 or 7, an additional list is provided
(1) (2) (3) (4) (5) (6) (7) (8) (9) (10)
Mass1 part_ID1 IFLAG
Mass2 part_ID2 IFLAG
etc etc IFLAG
MassN part_IDN IFLAG

## Definitions

Field Contents SI Unit Example
type Input type.
= 0
Mass is added to each node of node group.
= 1
Mass/N is added to each node of node group.
N being the total number of nodes in the node group.
= 2
Mass/Area - additional surface mass applied on the shell area.
= 3
Additional mass distributed on the part-group.
= 4
Final mass distributed on the part-group. 2
= 5
Mass is added to each single node.
= 6
Additional mass distributed on each single part.
= 7
Final mass distributed on each single part. 2

(Integer, maximum 10 digits)

unit_ID Unit Identifier.

(Integer, maximum 10 digits)

(Character, maximum 100 characters)

(Real)

$\left[\text{kg}\right]$
Mass/Area Added mass per unit area.

(Real)

$\left[\frac{\text{kg}}{{\text{m}}^{2}}\right]$
grnd_ID Node group to which the mass is added

(Integer)

surf_ID Surface to which the mass per unit area is added.

(Integer)

grpart_ID Part group to which the mass is added.

(Integer)

node_IDN Node to which the mass is added.

(Integer)

part_IDN Part to which the mass is added.

(Integer)

IFLAG Flag to switch between area weighted distribution and volume weighted distribution of the added mass to parts).
= 0 (Default)
Volume weighted distribution (shell and solid parts).
= 1
Area weighted distribution (shell parts only).

(Integer)