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September 21, 2023 at 5:11 pm
Joey Richardson
SubscriberI am trying to save the nodal forces of a DYNA simulation and can't get the NODFOR file to generate. My card deck is below. Does anyone know what is going on here? Thanks!
$ LS-DYNA Keyword file created by fem.dyna Python functions
$ Created on 05:53PM on July 24, 2023
*KEYWORD
*CONTROL_ENERGY
$ hgen, rwen, slnten, rylen
2,2,2,2
*CONTROL_MPP_IO_NOFULL
*CONTROL_TERMINATION
$ endtim, endcyc, dtmin, endeng, endmas
0.0045,0,0.0,0.0,0.0
*CONTROL_TIMESTEP
$ dtinit, tssfac, isdo, tslimt, dt2ms, lctm, erode, ms1st
1e-06,0.02,0,0.0,0.0,1,0,0
*DATABASE_NODOUT
$ dt, binary, lcur, ioopt, option1, option2
2e-05,0,0,1,0.0,0
*DATABASE_NODFOR
$ dt, binary, lcur, ioopt, option1, option2
1e-06,0,0,1,0.0,0
*DATABASE_EXTENT_BINARY
$ neiph, neips, maxint, strflg, sigflg, epsflg, rltflg, engflg
0,0,3,0,2,2,2,1
$ cmpflg, ieverp, beamip, dcomp, shge, stssz, n3thdt, ialemat
0,0,0,4,1,1,2,0
*DATABASE_FORMAT
$ iform, ibinary
0,1
*DATABASE_HISTORY_NODE_SET
$ id1, id2, id3, id4, id5, id6, id7, id8
1,0,0,0,0,0,0,0
*SET_NODE_GENERAL
1
ALL
*PART
$ Title
background
$ pid, secid, mid, eosid, hgid, grav, adpopt, tmid
1,1,1,0,0,0,0,0
*SECTION_SOLID
$ secid, elform, aet
1,2,0
*PART
$ Title
background pml
$ pid, secid, mid, eosid, hgid, grav, adpopt, tmid
2,2,2,0,0,0,0,0
*SECTION_SOLID
$ secid, elform, aet
2,2,0
*INCLUDE
../../nodes.dyn
*INCLUDE
../../elems.dyn
*INCLUDE
../NodalLoads.dyn
*INCLUDE
Materials.dyn
*INCLUDE
LoadCurves.dyn
*END -
September 23, 2023 at 5:09 am
Ushnish Basu
Ansys EmployeeYou have to use DATABASE_NODAL_FORCE_GROUP
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September 26, 2023 at 4:15 pm
Joey Richardson
SubscriberI tried adding this card:Â
*DATABASE_NODAL_FORCE_GROUP
1,1
And got the following error:Â *** Error 10146 (KEY+146)
   coordinate set id 1 is undefined
   CHECKING NODAL FORCE GROUPSÂ
Do I need to setup some sort of coordinate set to be able to save forces? I don't think this has been necessary to save nodal displacements. Is there an example to see how to set this up/how to save forces?
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September 26, 2023 at 4:19 pm
Ushnish Basu
Ansys EmployeeIf you don't have a coordinate system ID, then no need to specify one in that card, just specify the node set
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September 26, 2023 at 5:37 pm
Joey Richardson
SubscriberThat worked! Thank you
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September 26, 2023 at 5:42 pm
Joey Richardson
SubscriberSpoke too soon... The nodfor file was created, but it is empty.Â
Here is how I am creating my database and node sets. Do you have any suggestions on why the nodfor file would be empty?
*DATABASE_NODOUT
$ dt, binary, lcur, ioopt, option1, option2
2e-05,0,0,1,0.0,0
*DATABASE_NODFOR
$ dt, binary, lcur, ioopt, option1, option2
1e-06,0,0,1,0.0,0
*DATABASE_NODAL_FORCE_GROUP
1
*DATABASE_EXTENT_BINARY
$ neiph, neips, maxint, strflg, sigflg, epsflg, rltflg, engflg
0,0,3,0,2,2,2,1
$ cmpflg, ieverp, beamip, dcomp, shge, stssz, n3thdt, ialemat
0,0,0,4,1,1,2,0
*DATABASE_FORMAT
$ iform, ibinary
0,1
*DATABASE_HISTORY_NODE_SET
$ id1, id2, id3, id4, id5, id6, id7, id8
1,0,0,0,0,0,0,0
*SET_NODE_GENERAL
1
ALL
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September 27, 2023 at 7:09 am
Ushnish Basu
Ansys EmployeeUnfortunately, we cannot comment on any specific case in this forum
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September 27, 2023 at 4:02 pm
Joey Richardson
SubscriberIs there any contact or support package for help with specific cases?
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September 29, 2023 at 5:59 am
Ushnish Basu
Ansys EmployeeYou can get in touch with your Ansys contact (likely the account manager) and ask them if you can be provided more personalised help.
Regards,
Ushnish
Â
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