Pressure Vessel Design Overview
In a Pressure Vessel Design study, you combine the results of static
studies with the desired factors. Each static study has a different set
of loads that produce corresponding results. These loads can be dead loads,
live loads (approximated by static loads), thermal loads, seismic loads,
and so on. The Pressure Vessel Design study combines the results of the
static studies algebraically using a linear combination or the square
root of the sum of the squares (SRSS).
When using a solid mesh, the software provides a stress linearization
tool to separate bending and membrane components.
NOTES
Important
- Only loads can vary. The materials, restraints, contact conditions,
model configurations, and meshes of the static studies being combined
must be identical.
The solution is valid only if the results are
in the linear range. Therefore, the studies cannot use Large
Displacement solution or No
Penetration contact since the linearity assumption fails in these
cases.
This functionality is largely used in the design
of pressure vessels. Design and manufacturing codes require combining
certain load scenarios.
The software does not solve a set of simultaneous
equations. It reads existing results of the selected studies and combines
them.
When calculating quantities such as resultant
displacements and von Mises and principal stresses, the software first
combines the directional components.
For Pressure Vessel Design studies using SRSS,
you cannot create displacement or deformation plots. This is because negative
components of displacement become positive when squared. This produces
incorrect results when the values are summed.
Reports are not available for Pressure Vessel
Design studies in this release.
To use a Pressure Vessel Design study:
Run the static studies that you want to combine.
Right-click the model name in the Simulation study
tree and select Study.
In the PropertyManager, click Pressure
Vessel Design 
then click 
.
Right-click Setup
to access the Result
Combination Setup PropertyManager.
Select the studies that you want to combine
and apply a factor for each study if you select Linear
Combination.
Right-click the study and select Run.
The software combines the results of the
selected studies. You can view default
plots or create new plots.