Uniform Pressure

PROPERTY LOAD PRESSURE [load_name] [loadcase_no] part_name/ALL args

Argument Meaning

load_name FEMGEN load name (can also be the name of a DPL file, see note 5).

loadcase_no FEMGEN loadcase number (links load to an ANSYS step).

part_name Geometry containing element faces/edges.

arg1 Pressure value (or 1 for a DPL file).

arg2 Degree of Freedom Indicator (0,1,2,3,4,5,6), see also Table 7.5.

Notes:

1.

Valid part types are beams, plate edges, shell faces, brick faces.

2.

The degree of freedom indicator should be set to zero (normal) for plate and brick elements. It should be set, for beams, to the load direction key (1 to 5) as defined by ANSYS in the Elements Manual. For shell elements, if the degree of freedom indicator is set to zero then the interface program writes it as direction 1 in ANSYS convention. If it is different from zero, its value (1 to 6) should follow ANSYS convention.

3.

The user should be warned that, as a result of note 2, when the degree of freedom indicator is not equal to zero, the load displayed in FEMGEN may not correspond to its actual definition as seen by ANSYS.

4.

Local Coordinate System attached to Pressure load is not supported.

5.

If the load name starts with 'PRES' then the interface program treats it as being the name of a DPL (Discrete Point Load) file that contains the pressure values at the elements centroids.

• It is assumed that the points in the DPL file match the elements centroids of the current mesh. Note that a simple proximity criterion is used: the value at the nearest point to the element centroid is attributed to this element.
• A valid part is either a surface, a set of surfaces or 'All' when the whole model only contains surfaces. In all cases surfaces must be meshed with shell elements only.
• Neither arg1 or arg2 are used, however arg1 needs to be entered.
• Load masks and space curves are supported.
• The DPL file must contain 4 columns of real numbers written in free format; the first three columns are for the elements centroids global coordinates and the last column gives the pressure value.
• The DPL file is expected to be either in the current working directory or in the directory specified by the environment variable FG_ANS_DPL, see paragraph 1.4 of Chapter 1.

Example FEMGEN Command:

PROPERTY LOAD PRESSURE LO1 1 L2 -100 0

Corresponding ANSYS Input Deck:

 
SFE,       2,2,PRES,, -100.0000    
SFE,       4,2,PRES,, -100.0000