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PRO.LB.0.NT.003.ASC Issue. 6 rev. 3 Page: 3.47
4.6.1.3 Requirements for the dynamic models
4.6.1.3.1 Physical models
4.6.1.3.1.1 General
The authorised NASTRAN elements are provide in the table hereunder.
Item connectivity card property card material card
1D elements PROD, PBAR, PBEAM MAT1
2D elements CTRIA3, CQUAD4 PSHELL MAT1, MAT2, MAT8
3D elements CPENTA, CTETRA, CHEXA PSOLID MAT1
MAT9
Masses CONM1, CONM2, CMASS2 - -
Local stiffness and
CELAS1, CELAS2 PELAS
connection
-
Rigid element & constraint RBAR, RBE2, MPC, RBE3 - -
Miscellaneous PLOTEL - -
NASTRAN parameter PARAM AUTOSPC YES - -
Table 4.6-1: Authorised NASTRAN cards
The following NASTRAN cards are to be prohibited:
NASTRAN prohibited cards
PARAM BAILOUT
PARAM K6ROT
NASTRAN parameters *
PARAM MAXRATIO
PARAM EPZERO
NASTRAN parameters ** PARAM WTMASS
NASTRAN cards CQUAD8, CQUADR, CTRIAR CTRIA6, EGRID
Table 4.6-2: Prohibited NASTRAN cards
• * parameters affecting model conditioning
• **parameters affecting the other models during FEM assembly
In case of necessity to use other cards than the authorised elements, the supplier will have to ask for the agreement
of ALCATEL SPACE.
Remarks concerning FEM rules:
It is requested to use elements RBE2 with zero length and MPC with zero length (to simplify the use for
thermoelastic analyses)
The use of MPC card is forbidden to link interface nodes between substructures. The interface shall be performed
with CELAS or zero length RBE2.
The interface nodes do not have to be dependent nodes of rigid bodies
The interface nodes do not have to be linked together by a rigid body
Only RBE3 with simply supported independent nodes will be allowed (independent nodes: DOF 123 (456
forbidden) , reference node: No restriction on dependent DOF)
4.6.1.3.1.2 Size limitation
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