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Active Member
tamararr
Posts: 10
Registered: ‎11-15-2011

warn message: isolated nodes have been found

471 Views, 7 Replies
11-15-2011 03:42 AM

Hi!I am modeling a steel S355 plate of dimensions 10000 x 4000 x 250mm. It is fixed in one of its boundaries and has 2 loads applied: one in its plane in the opposite boundary to the support and one acting perpendicularly in the middle of it.

I more or less followed the guideline for plates in robotoffice.com but when I start the calculation I get the warn message of isolated nodes in the model. I tried to solve this problem delating the nodes where the load is applied but of course, the load dissappears. If I disregard this message, I get no result when doing the calcualtion.

 

Hope you can help me with this.

Thank you in advance.

 

Regards,

Tamara

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Product Support
jad.dellel
Posts: 219
Registered: ‎11-30-2010

Re: warn message: isolated nodes have been found

11-15-2011 04:10 AM in reply to: tamararr

Hi tamara,

can you upload your rtd file compressed please?

Thanks.

---------------------------------------------------------------


Jad DELLEL
Structural Engineering Support Autodesk, Inc.

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Active Member
tamararr
Posts: 10
Registered: ‎11-15-2011

Re: warn message: isolated nodes have been found

11-15-2011 04:35 AM in reply to: tamararr

Hi!

Thank you for the fast answer. I tried again but instead of defining the nodes for applying the loads, I used the  "force in point" command. I got a result but I am not sure if this is the best way to model the plate. It is a solid steel plate and I followed these steps:

 

Volumetric structure design

Axis definition

Polyline/contour

Panel-and press a point inside the contour

Extrude it to the thickness (250mm)

Fixed support (linear) in one of the 4000mm length boundaries

Defined two dead loads

Load definition-force in point (and gave the coordinates and value of the two loads)

 

Thank you for your help.

 

Regards,

Tamara

 

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Product Support
jad.dellel
Posts: 219
Registered: ‎11-30-2010

Re: warn message: isolated nodes have been found

11-15-2011 04:58 AM in reply to: tamararr

Tamara,

You should use the shell design ( plate design is included).

Please see http://images.autodesk.com/adsk/files/robot_2010_training_manual_metric.pdf from page n°98, It should helps you to define your plate.

I'll wait your shell model :smileyhappy:

---------------------------------------------------------------


Jad DELLEL
Structural Engineering Support Autodesk, Inc.

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Active Member
tamararr
Posts: 10
Registered: ‎11-15-2011

Re: warn message: isolated nodes have been found

11-15-2011 06:04 AM in reply to: tamararr

Thank you very much for your help! :smileyhappy:

I attach the shell model.

 

Regards,

Tamara

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Product Support
jad.dellel
Posts: 219
Registered: ‎11-30-2010

Re: warn message: isolated nodes have been found

11-15-2011 06:16 AM in reply to: tamararr

Tamara,

I think your plate is designed on the wrong plane (XZ), It should be done on the (XY) plane.

Please check it.

---------------------------------------------------------------


Jad DELLEL
Structural Engineering Support Autodesk, Inc.

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Active Member
tamararr
Posts: 10
Registered: ‎11-15-2011

Re: warn message: isolated nodes have been found

11-15-2011 06:22 AM in reply to: tamararr

You are totally right, thank you again!:smileyhappy:

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Active Member
tamararr
Posts: 10
Registered: ‎11-15-2011

Re: warn message: isolated nodes have been found

11-16-2011 01:41 AM in reply to: tamararr

Hi!

I have one more question: how to check plate buckling and torsional buckling of the model?

Thank you very much!

Regards,

/Tamara

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