| Info |
|---|
This page is devoted to frequently asked questions |
| Wiki Markup |
| {info}
This page is devoted to *frequently asked questions* (FAQ) related to [|kb:Meshing]. {info} \\ {. |
| On this page |
|---|
Why do I no longer receive errors when I change mesh to be only at visible gridlines?
Extended Question: When I mesh slabs and walls at 36”-48”, there are numerous warnings which include no stiffness, negative stiffness, lost accuracy, and ill-conditioned / unstable. However, when I change the meshing option to be only at visible gridlines, the model runs without error, and forces / reactions are significantly different. Why is this?
Answer: Columns are not automatically included as meshing locations. Therefore it is important to mesh at grid lines to avoid ill-conditioning and to ensure a stable model.
| Hidden content |
|---|
| *Related Incident:* * } h2. Why do I no longer receive errors when I change mesh to be only at visible gridlines? *Extended Question:* When I mesh slabs and walls at 36”-48”, there are numerous warnings which include no stiffness, negative stiffness, [lost accuracy|kb:Lost accuracy], and ill-conditioned / unstable. However, when I change the meshing option to be only at visible gridlines, the model runs without error, and forces / reactions are significantly different. Why is this? *Answer:* Columns are not automatically included as [meshing|kb:Meshing] locations. Therefore it is important to mesh at grid lines to avoid ill-conditioning and to ensure a stable model. {hidden-content} *Related Incident:* * {incident:no=47898|comment=T/Q} {hidden-content} h2. To connect |
To connect meshes,
...
what
...
are
...
the
...
advantages
...
of
...
line
...
constraints
...
over
...
mesh
...
generators?
...
Answer:
...
...
generators
...
tend
...
to
...
distort
...
elements,
...
which
...
either
...
reduces
...
solution
...
accuracy
...
or
...
requires
...
a
...
more
...
refined
...
mesh
...
to
...
achieve
...
certain
...
levels
...
of
...
accuracy.
...
...
...
prevent
...
element
...
distortion,
...
which
...
minimizes
...
the
...
amount
...
of
...
meshing,
...
and
...
enables
...
efficient
...
and
...
accurate
...
formulation.
...
While meshing shells,
...
how
...
can
...
I
...
prevent
...
the
...
"Meshing
...
Failed"
...
error
...
message?
...
Answer:
...
To
...
resolve,
...
try
...
using
...
different
...
mesh
...
sizes
...
or
...
...
the
...
object
...
into
...
more
...
regular
...
shapes.
...
When
...
modeling
...
...
,
...
it
...
is
...
often
...
helpful
...
to
...
avoid
...
certain
...
shapes,
...
including
...
those
...
with:
...
- Corners
...
- close
...
- to
...
- zero
...
- or
...
- 180
...
- degrees.
...
- Large
...
- differences
...
- in
...
- the
...
- length
...
- of
...
- certain
...
- edges.
...
Why do shells appear meshed though I have not assigned an auto-mesh?
Answer: Software automatically uses general meshing to mesh any areas drawn using more than four joints. To avoid meshing when no auto-meshing has been assigned, subdivide the object such that each region has four joints or less.
| Hidden content |
|---|
| *Related Incidents:* * *Answer:* {new-tab-link:http://www.csiberkeley.com/}CSI{new-tab-link} Software automatically uses general meshing to mesh any areas drawn using more than four [joints|kb:Joint]. To avoid meshing when no auto-meshing has been assigned, [subdivide|Subdivide frame objects] the object such that each region has four joints or less. {hidden-content} *Related Incidents:* * {incident:no=28386|comment=Tips for preventing meshing from failing and creating mesh for circular opening.} \\ * {incident:no=28658|comment=Linked dev id 20885: Recommendation by _is_ to reduce complexity of the geometry of the area objects so that the program can automesh them.} {hidden-content} |