force direction with App.Vector

[shahram10715]

If I try to type the following command:

Code: Select all

App.ActiveDocument.FemConstraintForce.Direction = (App.ActiveDocument.Line002,["Edge1"])

there is no problem, but if I change the above code to the following I get a type error. Is there any chance to add this type to input?

Code: Select all

App.ActiveDocument.FemConstraintForce.Direction = (App.Vector(1,0,0)) 

Traceback (most recent call last):
File "<input>", line 1, in <module>
TypeError: Property 'Direction': type must be 'DocumentObject', 'NoneType' or ('DocumentObject',['String',]) not Base.Vector

[bernd]

The error message said it

TypeError: Property 'Direction': type must be 'DocumentObject', 'NoneType' or ('DocumentObject',['String',]) not Base.Vector

You should provide a document object and a element (in this case an Edge) of this document objects shape. You did it in your first example.

You should not provide a vector. It is what you did in your second example.

bernd

[bernd]

... Is there any chance to add this type to input? ...

Not an simple one.


in FEM examples either an Edge of the object which was meshed is taken https://github.com/FreeCAD/FreeCAD/blob ... is.py#L138 or a line is created just for the load direction https://github.com/FreeCAD/FreeCAD/blob ... y#L96-L102 and https://github.com/FreeCAD/FreeCAD/blob ... ll.py#L164

[shahram10715]

Thanks a lot, so if I don't have an edge in that direction I must first draw a line in that direction, and then assign it.

[bernd]

... if I don't have an edge in that direction I must first draw a line in that direction, and then assign it.

exactly

[hex41434]

Hi,

I have a similar problem, I would like to apply force on specific position on my fem mesh ... should I also add a Face and pass its name as string to: "App.ActiveDocument.ConstraintForce.References"? seems a bit weird...

[Jee-Bee]

if had read this you had seen the a sketch an a line was enough

[hex41434]

Thank you Jee-Bee,

I still think that my question is a bit different

based on this link:
https://github.com/FreeCAD/FreeCAD/blob ... #L157-L165

I tried to create a vector and add it as force constraint.
force_constraint.References = [(force_point, "Vertex1")]
but finally I got this error:

/Fem/femmesh/meshtools.py", line 775, in get_force_obj_vertex_nodeload_table
(elem_info_string, {node[0]: node_load / node_count})
list index out of range

could you please help me to solve this, using "face" instead of "edge" ?

Thanks in advance

[hex41434]

Thank you Jee-Bee,

I still think that my question is a bit different

based on this link:
https://github.com/FreeCAD/FreeCAD/blob ... #L157-L165

I tried to create a vector and add it as force constraint.
force_constraint.References = [(force_point, "Vertex1")]
but finally I got this error:

/Fem/femmesh/meshtools.py", line 775, in get_force_obj_vertex_nodeload_table
(elem_info_string, {node[0]: node_load / node_count})
list index out of range

could you please help me to solve this, using "face" instead of "edge" ?

Thanks in advance

I solved it... I choose wrong Vertex position, when I updated the vertex position it worked! Thanks