![](../icons_C2/common/areference.gif) |
Surface
Mass Densities are used to
model purely inertial (non-structural) system characteristics such as
additional equipment. They represent scalar surface mass density fields of
given intensity, applied to surface geometries.
The user specifies the surface mass density. This quantity remains
constant independently of the geometry selection.
Units are surface mass density units (typically kg/m2 in SI). |
|
Mass sets can be included in static cases: in this case,
they are used for loadings based inertia effects.
|
|
Ball Joins can be applied to the following types of Supports:
![](../icons_C2/common/iconblck.gif)
|
|
This task shows you how to
create a Surface Mass Density applied to a virtual part or to a geometry
selection.
|
|
You can use the sample16.CATAnalysis
document from the samples directory for this task: a Finite Element Model containing a
Static or Frequency Analysis Case.
Before You Begin:
Go to View -> Render Style -> Customize View and make
sure the Shading, Outlines and Materials options are active in the Custom View Modes
dialog box.
|
|
1. Click the Surface Mass Density icon
.
The Surface Mass Density dialog box is displayed.
![](images/aPanelNSMassSurfaceMass.gif)
2. You can change the identifier of the Surface Mass Density by editing
the Name field.
3. Enter the value of the surface mass density.
4. Select the support (a surface or face
geometry) on which the surface mass density is applied. Any selectable geometry is
highlighted when you pass the cursor over it.
![](images/aImageMassSurface.gif)
You can select several supports in
sequence, to apply the Surface Mass Density
to all supports
simultaneously.
5. Click OK in the Surface Mass Density dialog box to
create the Surface Mass Density.
A Surface Mass Density object appears in the specification tree under the
active Masses objects set.
|
![ainfo.gif (980 bytes)](../icons_C2/common/ainfo.gif) |
![](_themes/v5r5/ul1.gif) | You can either select the
support and then set the Surface Mass Density specifications, or set the
Surface Mass Density specifications and then select the
support. |
![](_themes/v5r5/ul1.gif) | If you select other
supports,
you can create as many Surface Mass Densities as desired with the
same dialog box. A series of Surface Mass Densities can therefore be
created quickly. |
![](_themes/v5r5/ul1.gif) | Non-Structural Masses are not required for
either Stress
Analysis or Modal computations. |
![](_themes/v5r5/ul1.gif) | If several Analysis Cases have been defined in
the Finite Element Model, you must activate a Masses objects set in the features
tree before creating a Surface Mass Density object (only available if you
have ELFINI Structural Analysis product installed). |
![](_themes/v5r5/ul1.gif) | Surface Mass Density objects can be edited by a double click on the
corresponding object or icon in the features tree. |
|
![ainfo.gif (980 bytes)](../icons_C2/common/awarning.gif) |
Make sure the computation is finished before
starting any of the following operations. |
![ainfo.gif (980 bytes)](../icons_C2/common/tips.gif) |
Products
Available in
Analysis Workbench
The ELFINI Structural
Analysis product offers the following additional features with a right
mouse click (key 3) on:
![](_themes/v5r5/ul1.gif) | a Line Mass Density object:
![](_themes/v5r5/ul2.gif) | Surface Mass Density Visualization on Mesh: the translation of your
Surface Mass Density object specifications into solver specifications
can be visualized symbolically at the impacted mesh entities, provided
the mesh has been previously generated via a Compute action. |
|
|
|