This manual provides a detailed list and usage information regarding command statements, model statements, functions and
the Subroutine Interface available in MotionSolve.
Geometric Properties ElementPBEAM9 lets you specify the geometric properties for an associated beam element of an arbitrary cross-section using
a polynomial expression
This manual provides a detailed list and usage information regarding command statements, model statements, functions and
the Subroutine Interface available in MotionSolve.
This type of property card is used to specify the geometric properties
of the BEAMC and BEAM9 element.
Each beam property element must have a unique identification
number.
This property card defines the geometrical properties of the beam.
The material properties of the beam are defined by the material
specified by mid.
If only ri1 and ro1 are
specified, MotionSolve assumes the cross
section of the beam to be constant. However, if additionally,
ri2 and ro2 are specified,
the radii are varied linearly from node 1 to node 2 to represent the
beam in the animation H3D.
For the beam element, nf can only be used with
MAT6 to reduce the bending stiffness, that can
related with the buckling stiffness.
graph is a post processing flag that determines
how this element will be represented in the animation H3D file.
graph = "0" implies that
this element will not be represented in the H3D
graph = "1" implies that
this element will be represented as a line drawn between
the two connecting nodes.
Figure 1. The representation of a circular beam with graph =
1.
Note: When using
graph="0" or
graph="1", you
will not be able to visualize the stress, strain or
displacement contours. To do this, use
graph="2" or
graph="3".
graph = "2" implies that
the beam will be represented by 3D solid elements. This
mode is useful when trying to visualize the stress/strain
and displacement contours.
Figure 2. The representation of a circular beam with
graph = 2. The beam is represented by 3D
elements
graph = "3" implies that
the beam is represented both as 3D solid elements as well
as a line connecting the two nodes of the beam. This is
useful when you need to visualize both the center line and
the 3D representation of the beam.
Figure 3. The representation of a circular beam with graph =
3. The 3d elements in the middle of the beam are
turned off to show the center line of the
beam
When representing the beam as a solid, the arguments
ngx, ngr and
ngt determine the number of elements
that are used to represent the beam in the animation H3D.
Figure 4. Effect of ngx, ngr and ngt on the 3D representation
of a simple circular beam
ngx = ngr = 1; ngt = 1
Figure 5.
ngx = ngy = 2; ngt = 12
While increasing the
ngx, ngr and
ngt results in a better representation
of the beam, it also increases the post-processing time taken by
MotionSolve to write out the
H3D. In addition, large values of ngx,
ngr and ngt will
increase the file size of the H3D considerably. Consider using
the minimum values of these attributes that satisfy your
visualization needs.