The Pressure PropertyManager applies uniform or nonuniform (variable)
pressure to faces for use in structural (static, frequency, buckling, nonlinear and dynamic)
studies.
Pressure Type

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. 

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 subassemblies) of the
assembly.


Faces,
Edges for Pressure 
Select faces of solid models or
edges and faces of shell models to apply the pressure. 

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.


Pressure Value

Units 
Sets the units 

Pressure value 
Sets the pressure value. 
Variation with Time
For linear and nonlinear dynamic studies, you can define a
timedependent pressure.
Linear 
Uses a default linear time curve
which passes through the points (0,0) and (t_{end}, P_{value}). Where P_{value} is the pressure specified in
the Pressure value box
and t_{end} is the End time specified on the Solution tab of the Nonlinear dialog box. 
Curve 
Uses a userdefined 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. 
Graph 
Displays the actual timedependent
pressure. 
Nonuniform Distribution
Specifies options for nonuniform pressure distribution.

Select a Coordinate System 
Select a coordinate system to
define the nonuniform pressure:
 Cartesian coordinate system
(x, y, z)
 Cylindrical coordinate
system (radial "r", circumferential "t", axial "z")
 Spherical coordinate system
(radial "r", longitude " t", latitude "p")


Units

Sets the units (length) for the Cartesian (x, y, z),
cylindrical (r, z), and spherical (r) coordinates. These units are independent of the units of
pressure value and the units defined in .


Angular Units

Sets the angular units for the
cylindrical (t) and spherical (t, p) coordinates.
Trigonometric functions always treat the
input value in radians. To convert degrees to radians
multiply by pi /180 (for example cos("t" * 3.14159265 /
180.0)).


Edit
Equation 
Defines the equation which
describes the spatial variation of the pressure in the selected
coordinate system. You can use a list of basic mathematical
operators from the Functions dropdown menu.
In the equation interface, enter the
coordinates inside quotation marks: "x", "y", "z", "r", "t", and
"p".
Equation
for nonuniform pressure distribution based on
cylindrical coordinates (r, t, z): 
P (r, t, z)
= 5 * "r" + sin ("t") + 2 * "z" 
Equation
for nonuniform pressure distribution based on
spherical coordinates (r, t, p): 
P (r, t, p)
= "r" + 3 * sin ("t") + 2 * cos ("p") 

Example: Nonuniform Pressure Distribution
Symbol Settings
Sets the color and size of pressure symbols

Edit
color 
Select a color for the pressure
symbols from the color palette. 

Symbol
size 
Use the spin arrows to change the
size of the pressure symbols. 

Show
preview 
Turns on/off the display of
pressure symbols. 
Notes:
Example of nonuniform pressure distribution defined by a reference
Cartesian coordinate system.
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 Cartesian
coordinate system. The coordinate values depend on the selected Units
system.
* indicates multiplication