Learning Forum

[venugopal4048]

Hello all!

I am doing nonlinear buckling analysis, I need to incorporate the geometric imperfection into the model. I already know how to add geometric imperfection by using one mode shape. I would like to add a combination of mode shapes as a geometric imperfection(like modes 1,2,3 in linear buckling analysis). Is it possible to add it in workbench?

Thanks in Advance!

[jj77]

See this video: In the upgeom.inp they show in the video you need to add another line with UPGEOM for a second mode (so say we want first and third mode to be combined). So the upgeom file would be then:

/prep7

UPGEOM, 0.001, 1, 1, file, rst, 

UPGEOM, 0.001, 1, 3, file, rst,

cdwrite,db,file,cdb

 

Or one could loop over ten modes adding a tenth of each mode (this is from an old help manual v16 ch 21.6):

/prep7

*do,i,1,10

upgeom,0.1,1,i,file,rst       ! Add imperfections as a tenth of each mode shape

*enddo
cdwrite,db,file,cdb

 

 

https://www.youtube.com/watch?v=AGkE-Be3tEs

[NIKHIL GUPTA]

Hi,

The vedio link shared above is based on Ansys version 12 in which the 'finite element modeler' option was available. Refer  fig 1 below.

In current versions of Ansys like 2023 R2, we don't have the option to add 'Finite element modeler' in project schemetic. Refer fig 2 below.

As 'finite element modeler' option is not available now, than how can we proceed to include imperfections in geometrical model for two mode shapes ( say mode 1 and mode 3) in latest versions of Ansys?

 

Fig 1: Ansys Version 12, Finite element modeler option available

 

 

Fig 2: Ansys Version 2023, Finite element modeler option not available

 

Thanks and Regards.

[Erik Kostson]

 

Hi

Yes it is (it is not visble by default) – to show and use it  in the wb project page go to the bottom left part and press “View All/Customize”, then it can be found under the component systems.

 

If you have any other question open up a new post – this is an old one and is closed now.
Erik