FEM ConstraintSelfWeight: Difference between revisions

From FreeCAD Documentation
No edit summary
No edit summary
Line 10: Line 10:
#You can modify the direction of gravitation by changing its vector coordinates in the property bar of newly created ConstraintSelfWeight object.
#You can modify the direction of gravitation by changing its vector coordinates in the property bar of newly created ConstraintSelfWeight object.


==Limitations== <!--T:4-->
==Scripting==<!--T:4-->

== Solver specific informations ==
=== CalculiX ===
===Limitations===<!--T:5-->
*You need to modify .inp file to edit gravity acceleration.
*You need to modify .inp file to edit gravity acceleration.
*Self weight is applied to the element set Eall means to the whole model.
*Self weight is applied to the element set Eall means to the whole model.


===Editing CalculiX input file===
== Solver specific informations ==
=== CalculiX ===<!--T:5-->
Acceleration constant can be edited by hand modification after generating CalculiX input file.
Acceleration constant can be edited by hand modification after generating CalculiX input file.



Revision as of 20:43, 19 March 2017

FEM ConstraintSelfWeight

Menu location
FEM → Constraint self weight
Workbenches
FEM
Default shortcut
C,W
Introduced in version
-
See also
FEM tutorial

Description

Constraint self weight defines gravity acceleration 9,81 m/s^2 acting on the whole model in the prescribed direction.

How to use

  1. Click on or choose FEM Constraint self weight from the top menu or press C then W keys.
  2. You can modify the direction of gravitation by changing its vector coordinates in the property bar of newly created ConstraintSelfWeight object.

Scripting

Solver specific informations

CalculiX

Limitations

  • You need to modify .inp file to edit gravity acceleration.
  • Self weight is applied to the element set Eall means to the whole model.

Editing CalculiX input file

Acceleration constant can be edited by hand modification after generating CalculiX input file.

Example of lines in .inp file:

*DLOAD
Eall,GRAV,9810,0.0,0.0,-1.0

where 9810 is gravity acceleration in [mm/s^2]