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Depending on the shape's parameter values, the shape's boundary surface has up to 6
faces: outer and inner paraboloid, base and top disc, cut faces at "angle1" and "angle2".
By default, the complete boundary surface of the shape is active. For a surface shape, only
one side of the boundary surface can be made active by changing this default via the respective drop down menu on the "Meshing" page of the shape wizard.
When defining the paraboloid shape, you can choose from several possible options:
The paraboloid can be segmented vertically, i.e. like cutting a piece of cake out of it.
The apex of the paraboloid can be truncated.
For a basic paraboloid (full paraboloid), the user needs to specify only two parameters: Parameter p1 defines the centre point of the top of the paraboloid and p2 define the centre
point at base of the paraboloid. As a default "diam", which is the external diameter of the
circular paraboloid base, will be 4 * | p1p2 |. Because no more parameters are defined, the
paraboloid will be full and complete paraboloid. By default the paraboloid is a solid paraboloid (thick is empty). To change this, the thickness of the walls of the paraboloid (thick)
needs to be specified. When the thickness is set to 0, the walls are infinitely thin. When the
thickness is defined, "diam" is the external diameter of the circular base of the paraboloid.
In order to segment the paraboloid, p3, "angle1" and "angle2" have to be specified. The
points p3, p1 and p2 define the plane which serves as starting point for the angles. Going
from that point, "angle1" defines the start and "angle2" defines the end of the segment
around the axis (p1p2).
To truncate the paraboloid, the user has to define h1, which is the length from p1 to h1,
along the vector (p1p2). h2 has to be defined also, which is then the location of base of the
paraboloid.
6.1.5.3 Meshing
The meshing directions a, b, c are shown in the Figure 6-9, along with how the elements are
numbered.
The numbering of nodes and elements of the shape is according to the face order and numbering directions given below:
outer/inner paraboloids: (top-base, cutl-cut2)
base/top discs : (inner-outer, cut1 -cut2)
cut1/cut2 faces : (inner-outer, base-top)
Note that the first value increments fastest. For a clearer picture of the node and element
numbering, please refer to Figure 6-9.
Date:
2013-07-23
Revision
1.8.2
Software User Manual
State:
Final
Reference: R077-230rep_01_08_02_Software_User_Manual_Framework.doc
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