Pressure table definition

@PRESSURE_TABLE_DEFINITION {
@PRESSURE_TABLE_NAME {PresTableName} {
@Y_ENTRY {v1, ..., vnv}
@TABLE_ENTRIES {
@X_ENTRY {ui}
@PRESSURE {pi, 1, ..., pi, nv}
}
@COMMENTS {CommentText}
}
}

NOTES

Figure 1. Grid for the definition of a pressure table.
  1. This section defines a pressure distribution over a surface. This loading table is used in conjunction with face loads to apply distributed loads on shell or membrane elements. Loading will be defined at the nodes of a rectangular grid over the surface that defines the geometry of the shell or membrane. The u and v coordinates of this NURBS surface will be used to defined the grid points, as depicted in fig. 1. At first, the number of grid points nu and nv along the u and v coordinates, respectively, are defined. Next, the nv grid points, v1, ..., vnv, along the v axis are defined. Note that v1 = 0.0, vnv = 1.0, and the intermediate values must appear in ascending order.
  2. The actual loading table consists of the definition of the loading along nu columns parallel to the v axis. Each column starts with the ui entry at which is is located, followed by the nv loads at the nv grid points of this column. Note that u1 = 0.0, unu = 1.0, and the intermediate values must appear in ascending order. At any point on the surface, the loading is linearly interpolated among the four closest grid points.
  3. It is possible to attach comments to the definition of the object; these comments have no effect on its definition.