User Area > Advice
Typical error message found in the LUSAS Solver text output file
(*.OUT):
***ERROR*** ELEMENT NUMBER P REPEATED COORDINATE
(KSPLAT PROCESSOR)
This normally occurs when a 2D plate element is assigned
in a 3D model.
Plate elements are used to model flat structures whose deformation can be assumed to be predominantly flexural. Shell elements are used to model 3-dimensional structures whose behaviour is dependent upon both flexural and membrane effects.
Accordingly, plate elements only
have X/Y coordinates (Z is assumed zero). Thus, if a plate element is assigned to
a surface with non-zero Z-coordinates,
the Z-coordinates are ignored and the elements "squashed" into the XY-plane. The remedy is
to use an appropriate shell element if the analysis is 3D. Alternatively, if it actually
a 2D analysis, ensure that the surfaces created
are all defined exactly in the XY-plane will enable plate
elements to be used.
For further information on selecting an element type, refer to the LUSAS help menu:
Help Topics > Modeller User Manual > Building a model > Attributes > Meshing and Element selection > Element Selection
The problem may be associated with
the following associated messages:
***WARNING*** ELEMENT NUMBER 3 UNREASONABLY
DISTORTED, RATIO LONGEST/SHORTEST SIDE = 0.10E+16
***ERROR*** ELEMENT NUMBER 3 ILLEGAL JACOBIAN DETERMINANT
OF -0.1110E-15 CHECK NODE ORDER
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