The Pressure PropertyManager applies uniform or nonuniform (variable) pressure to faces for use in structural (static, frequency, buckling, nonlinear and dynamic) studies.
Pressure Type
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Normal to selected face |
Applies pressure in the direction normal to each face or shell edge you select. In the case of shell edges, the pressure is applied normal to the narrow face (across the thickness) of the shell. |
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Use reference geometry |
Applies pressure in the direction specified by the reference entity you select. In an assembly, you can use reference geometry from the assembly or the components (parts and sub-assemblies) of the assembly.
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Faces, Edges for Pressure |
Select faces of solid models or edges and faces of shell models to apply the pressure. |
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Face, Edge, Plane, Axis for Direction |
Select a reference entity to specify the direction of pressure. This option appears only if you select Use reference geometry. The pressure you can apply depends on what you select:- Planar face or a reference plane
- You can specify pressure Along Plane Dir 1
 , Along Plane Dir 2  , or Normal to Plane  .
- Cylindrical face or a reference axis
- You can specify pressure in the Radial
 , Circumferential  , or Axial  direction.
- Edge
- You can specify pressure along the edge
 . To reverse the direction of pressure, enter a negative value.
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Pressure Value
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Units |
Sets the units. |
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Pressure value |
Sets the pressure value. |
Variation with Time
For linear and nonlinear dynamic studies, you can define a time-dependent pressure.
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Linear |
Uses a default linear time curve which passes through the points (0,0) and (tend, Pvalue). Where Pvalue is the pressure specified in the Pressure value box and tend is the End time specified on the Solution tab of the Nonlinear dialog box. |
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Curve |
Uses a user-defined time curve. Click Edit to define or import a time curve. The pressure at any time is calculated by multiplying the pressure value specified above by the Y value of the time curve. |
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Graph |
Displays the actual time-dependent pressure. |
Nonuniform Distribution
If checked, allows you to specify options for nonuniform pressure.
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Select a Coordinate System |
Select a coordinate system to define the nonuniform pressure. |
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Equation Coefficients |
Sets the polynomial coefficients which describe the spatial variation of the pressure in the selected coordinate system. |
When using Equation Coefficients, the coefficients should be specified based on the units of X and Y as shown in the following table:
| Selected Unit System |
Units of X and Y |
Units of "Value" |
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| SI |
m (meters) |
N/m2 |
| SI |
mm (millimeters) |
N/mm2 (MPa) |
| English (IPS) |
in (inch) |
psi |
| Metric (G) |
cm (centimeters) |
Kilogram force/cm2 |
Symbol Settings
Sets the color and size of pressure symbols
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Edit color |
Select a color for the pressure symbols from the color palette. |
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Symbol size |
Use the spin arrows to change the size of the pressure symbols. |
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Show preview |
Turns on/off the display of pressure symbols. |
Notes:
The nonuniform pressure distribution is defined by a reference coordinate system and the associated coefficients of a second-order polynomial.
p(X,Y) = V* (A + B*X + C*Y + D*X*Y + E*X^2 + F*Y^2)
Where:
p(X,Y) = magnitude of pressure applied at a point with coordinates x and y
V is the value specified in the Pressure value field.
X, Y = coordinates of the point relative to the selected coordinate system. The coordinate values depend on the selected Units system.
A, B, C, D, E, and F are polynomial coefficients. Their values depend on the selected Units system.
* indicates multiplication