Bulk Data Entry Defines a scalar mass element that is connected only to scalar points, without reference to a property entry.


(1) (2) (3) (4) (5) (6) (7) (8) (9) (10)
CMASS4 EID M S1 S2          


(1) (2) (3) (4) (5) (6) (7) (8) (9) (10)
CMASS4 23 14.92   23          


Field Contents SI Unit Example
EID Unique element identification number.

No default (Integer > 0)

M Scalar mass value.

No default (Real)

S1, S2 Scalar point identification numbers.

S1 or S2, but not both, may be blank or zero, indicating a constrained coordinate. This is the usual case.

Default = 0 (Integer ≥ 0; S1S2)



  1. Only one scalar mass element may be defined on a single entry.
  2. A scalar point specified on this entry does not need to be defined on a SPOINT Bulk Data Entry.
  3. This single entry completely defines the element since no material or geometric properties are required.
  4. Scalar mass elements are ignored in heat transfer analysis.
  5. This card is represented as a spring or mass element in HyperMesh.