Command manual

Command list

ADD_MASS

Mesh commands
Attention: This command is in the beta stage and the format may change over time.
*ADD_MASS
"Optional title"
coid, entype, enid, $m$, distribution

Parameter definition

VariableDescription
coid Command ID
entype Entity type
options: N, G, P, PS
enid Entity ID
$m$ Added mass or added mass per unit area (constant, CURVE or FUNCTION)
options: constant, fcn
distribution Mass distribution type
options:
0 $\rightarrow$ node mass weighted distribution ($m$ defines total mass)
1 $\rightarrow$ area weighted distribution ($m$ defines total mass)
2 $\rightarrow$ area weighted distribution ($m$ defines mass per unit area)

Description

This command is used to add mass to a node or geometrical region.

Example

Node mass

The following command adds a point mass of 0.13kg to a node with ID=1001.

*UNIT_SYSTEM
SI
*ADD_MASS
"point mass"
1, N, 1001, 0.13
Time dependent mass

A mass of 2.5kg is distributed to a surface and then removed after 0.01s.

*UNIT_SYSTEM
SI
*ADD_MASS
"distributed mass"
1, G, 55, fcn(345), 1
*GEOMETRY_SEED_COORDINATE
55
0.023, 0.45, 0.01
*FUNCTION
345
H(0.01-t) * 2.5