topic Re: Editing nodal spring values (API) in Robot Structural Analysis Forum

Converting nodal elastic support generated from planar support onto nodal support

Konrad.O — Fri, 10 Jan 2025 08:23:56 GMT

WIP

A copy of the archived "Converting nodal elastic support generated from planar support onto nodal support" topic:

http://forums.autodesk.com/t5/Autodesk-Robot-Structural/Editing-nodal-spring-values-API/td-p/3901799

Editing nodal spring values (API)

Anonymous — Mon, 06 May 2013 11:51:37 GMT

Hello.

I'm trying to model a footing in a volumetric model, and the soil stiffness is modeled trough springs in the bottom face of the footing via planar supports, so that the area of influence of each node is considered, but, I would like to run some experiments by editing the nodal spring stiffness according to their distance from the center of the footing. I wanted to work with the corresponding tables, but in the node tables, i'm not finding the calculated spring stiffness from Robot! Is there any way that i can see and edit these values via table? I could do it one by one, but I would rather not do that..

Thank you!

Re: Editing nodal spring values (API)

Rafal.Gaweda — Mon, 06 May 2013 11:51:15 GMT

You can see values in Nodes or Reactions table

These values are not editable but you can create (convert these values) as \to nodal supports and then play with the values in Supports table.

Example Macro converting planar supports (considering only kx ky kz) attached.

Re: Editing nodal spring values (API)

Anonymous — Fri, 10 May 2013 15:46:40 GMT

Works like a charm! Thank you 🙂

Re: Editing nodal spring values (API)

kamlinmoodley — Wed, 30 Sep 2015 15:02:32 GMT

How do we get the column for "Uz" in the reactions table? My table only has the first 6 columns as per attached pic

Re: Editing nodal spring values (API)

Rafal.Gaweda — Wed, 30 Sep 2015 15:30:30 GMT

RT.AddColumn (141)

Add such column to table

Re: Editing nodal spring values (API)

kamlinmoodley — Wed, 30 Sep 2015 15:50:47 GMT

How? I cannot see the option in the attached..

Re: Editing nodal spring values (API)

Rafal.Gaweda — Thu, 01 Oct 2015 06:33:01 GMT

Re: Editing nodal spring values (API)

kamlinmoodley — Thu, 01 Oct 2015 07:09:09 GMT

This does not represent the stiffness of the springs (kN/m) but instead shows displacement (mm)?

Re: Editing nodal spring values (API)

Rafal.Gaweda — Thu, 01 Oct 2015 07:19:44 GMT