NSM
Subcase Information Entry The NSM command can be used to select a non-structural mass set for mass generation.
Format
NSM = option
Example 1
SUBCASE 1
ANALYSIS=STATICS
SPC = 1
LOAD = 2
NSM=12
SUBCASE 2
ANALYSIS=STATICS
SPC = 3
LOAD = 4
SUBCASE 3
ANALYSIS=STATICS
SPC = 5
LOAD = 5
NSM=13
BEGIN BULK
NSM,12,PSOLID,3,0.3
NSM,13,PSOLID,3,0.7
Example 2
NSM=14
SUBCASE 1
ANALYSIS=STATICS
SPC = 1
LOAD = 2
NSM=12
SUBCASE 2
ANALYSIS=STATICS
SPC = 3
LOAD = 4
SUBCASE 3
ANALYSIS=STATICS
SPC = 5
LOAD = 5
NSM=13
BEGIN BULK
NSM,12,PSOLID,3,0.3
NSM,13,PSOLID,3,0.7
NSM,14,PSOLID,3,0.5
Definitions
Comments
- Only one NSM Subcase Information Entry can be present in the model.
- The value of the non-structural mass does not change during Topology Optimization.
- The NSM Subcase Entry is currently subcase-dependent only for Linear Static Analysis and Nonlinear Static Analysis. For all other solution sequences, the NSM entry should be defined globally above the first SUBCASE statement. If the NSM Subcase Entry is specified within any subcase which is not linear static or nonlinear static, then the run will be terminated with an error. Refer to Example 1 and Example 2 for a better understanding of current support for non-structural mass.