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LS-DYNA keyword writer (implicit static and eigenvalue, M3) (#25)

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* decks: LS-DYNA keyword writer (long format, implicit static and eigenvalue)

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01NmAttHhUZTokgPeEJia8sm

* decks: LS-DYNA golden files, Jacobian-sign node-order tests, re-reader and refusals

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01NmAttHhUZTokgPeEJia8sm

* docs: LS-DYNA writer status and deck notes

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01NmAttHhUZTokgPeEJia8sm

* decks: simplify the LS-DYNA writer (plan decides once, cards written in place, shared test tables)

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01NmAttHhUZTokgPeEJia8sm

* decks: LS-DYNA joins FORMATS (deck.write lsdyna), refusals reported together, shared concentrated loads

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01NmAttHhUZTokgPeEJia8sm

* decks: LS-DYNA on main's shared deck API (steps parameter, model helpers)

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01NmAttHhUZTokgPeEJia8sm

---------

Co-authored-by: jyviko <2501648+jyviko@users.noreply.github.com>
Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>
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Irakli KourtisClaude Opus 5.5jyviko
 authored and GitHub committed 2026-10-13 17:39:45 -04:00
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crates/decks/tests/lsdyna/cantilever_modes.k
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*KEYWORD long=y
$ Written by ModelCraft: implicit linear analysis, long format (20-column fields).
$ Units: mm-t-s-N-MPa (consistent; nothing is converted).
$ 2 steps are written as *CASE analyses: run LS-DYNA with CASE on its command line.
*NODE
$ nid x y z
1 0.0 0.0 0.0
2 1.0 0.0 0.0
3 2.0 0.0 0.0
4 3.0 0.0 0.0
5 4.0 0.0 0.0
6 0.0 1.0 0.0
7 1.0 1.0 0.0
8 2.0 1.0 0.0
9 3.0 1.0 0.0
10 4.0 1.0 0.0
11 0.0 0.0 1.0
12 1.0 0.0 1.0
13 2.0 0.0 1.0
14 3.0 0.0 1.0
15 4.0 0.0 1.0
16 0.0 1.0 1.0
17 1.0 1.0 1.0
18 2.0 1.0 1.0
19 3.0 1.0 1.0
20 4.0 1.0 1.0
99999999 5.0 0.5 0.5
*MAT_ORTHOTROPIC_ELASTIC_TITLE
Ply
$ mid ro ea eb ec prba prca prcb
1 1.6e-9 140000.0 10000.0 10000.0 0.02142857142857143 0.02142857142857143 0.45
$ gab gbc gca aopt
5000.0 3500.0 5000.0 2.0
$ xp yp zp a1 a2 a3
1.0 0.0 0.0
$ v1 v2 v3 d1 d2 d3
0.0 1.0 0.0
*SECTION_SOLID
$ secid elform
1 -18
*PART
beam
$ pid secid mid eosid hgid
1 1 1
*ELEMENT_SOLID
$ eid pid
$ n1 n2 n3 n4 n5 n6 n7 n8 n9 n10
1 1
1 2 7 6 11 12 17 16
2 1
2 3 8 7 12 13 18 17
3 1
3 4 9 8 13 14 19 18
4 1
4 5 10 9 14 15 20 19
*SET_NODE_LIST_TITLE
root
$ sid
2
1 6 11 16
*SET_NODE_LIST_TITLE
pad (rigid body)
$ sid
4
99999999 5 10 15 20
*CONSTRAINED_NODAL_RIGID_BODY_TITLE
pad
$ pid cid nsid
2 4
*CASE_BEGIN_1
*TITLE
Bend
*CONTROL_IMPLICIT_GENERAL
$ imflag dt0
1 1.0
*CONTROL_IMPLICIT_SOLUTION
$ nsolvr
1
*CONTROL_TERMINATION
$ endtim
1.0
*DEFINE_CURVE_TITLE
Bend ramp
$ lcid
1
$ a1 o1
0.0 0.0
1.0 1.0
*BOUNDARY_SPC_SET_ID
1clamp
$ nsid cid dofx dofy dofz dofrx dofry dofrz
2 1 1 1 1 1 1
*LOAD_NODE_POINT
$ nid dof lcid sf
99999999 2 1 -10.0
99999999 5 1 250.0
*DATABASE_BINARY_D3PLOT
$ dt
1.0
*DATABASE_SPCFORC
$ dt
1.0
*DATABASE_EXTENT_BINARY
$ neiph neips maxint strflg
1
*CASE_END_1
*CASE_BEGIN_2
*TITLE
Modes
*CONTROL_IMPLICIT_GENERAL
$ imflag dt0
1 1.0
*CONTROL_IMPLICIT_EIGENVALUE
$ neig center lflag lftend rflag rhtend
6 1 1.0 1 5000.0
*CONTROL_TERMINATION
$ endtim
1.0
*BOUNDARY_SPC_SET_ID
2clamp
$ nsid cid dofx dofy dofz dofrx dofry dofrz
2 1 1 1 1 1 1
*CASE_END_2
*END