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Found 2 results

  1. Hi all, I have problems with the definition of a nonlinear spring (PBUSHT) in combination with a TABLED1 entry. In the attached example I expect a deflection of 2.2 mm, but I got 30 mm. It looks like only the first entry in TABLED1 is used and this stiffness will be extrapolated. What is wrong in the input? I suppose that I have to enter deflection as x and force as y in the TABLED1 entry. Andreas $$ $$ Optistruct Input Deck Generated by HyperMesh Version : 14.0.120.28 $$ Generated using HyperMesh-Optistruct Template Version : 14.0.120 $$ $$ Template: optistruct $ UNITS = SI $ $HMNAME LOADSTEP 1"lc-01" 9 $ SUBCASE 1 LABEL lc-01 ANALYSIS NLSTAT SPC = 1 LOAD = 2 NLPARM = 4 $ BEGIN BULK GRID 2 50.0 0.0 0.0 GRID 6 50.0 -50.0 0.0 CBUSH 7 4 2 6 0.0 0.0 1.0 $ $HMMOVE 4 $ 7 $HMNAME COMP 4"bush_2" $HWCOLOR COMP 4 21 $ $ $HMDPRP $ 7 $ $ $HMNAME PROP 4"bush2" 2 $HWCOLOR PROP 4 11 PBUSH 4 K0.0 RIGID RIGID RIGID RIGID RIGID PBUSHT 4 KN 5 SPC 1 2 123456 0.0 SPC 1 6 13456 0.0 $ $HMNAME LOADCOL 5"force_disp" $HWCOLOR LOADCOL 5 21 TABLED1 5 LINEAR LINEAR + 0.0 0.0 1.0 1000.0 2.0 10000.0 3.0 1.0+8 + ENDT $HMNAME LOADCOL 4"nlparm" $HWCOLOR LOADCOL 4 25 $$ NLPARM 4 20 1 25 $ FORCE 2 6 01.0 0.0 30000.0 0.0 ENDDATA
  2. Hello! I really need your help. whenever I implemented OPTISTRUCT, I got " Non-convergent nonlinear iterations for subcase 2" result. I set hyper-elastic material, and pshellx for 2D design. Also My load collectors are, SPC/LOAD/TABLED1/NLOAD/NLPARM, and I set load step NLGEOM I don't know why I couldn'y get nonlinear analysis result in OPTISTRUCT. My material is the example of MATX62.. I attached My entities and NLPARM screen-picture too Please give me some advices Thank you, Best Regards,
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