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Maybe there is a bug in OSN v2.5.6(win7 64bit).
Made a 2Dmodel with OSN,according to the code as following:
ZeroLength1.tcl# Translational spring # Static analysis # # Written: MHS # Date: Feb 2000 # Units: kip, in # Define the model builder model BasicBuilder -ndm 2 -ndf 3 # Set some variables set L 120 set A 20 set E 30000 set I 1400 # Define nodes node 1 0.0 0.0 node 2 0.0 0.0 node 3 $L 0.0 # Define single point constraints fix 1 1 1 1 fix 3 1 1 1 # ndR ndC dofs equalDOF 1 2 1 3 # Define force-deformation relationship for spring # uniaxialMaterial ElasticPP $matTag $E $epsyP <$epsyN $eps0> uniaxialMaterial ElasticPP 2 1050 0.02 uniaxialMaterial Elastic 3 -50 # uniaxialMaterial Parallel $matTag $tag1 $tag2 ... uniaxialMaterial Parallel 1 2 3 # id ndI ndJ mat dir element zeroLength 1 1 2 -mat 1 -dir 2 # Geometric transformation geomTransf Linear 1 # id ndI ndJ A E I transf # element elasticBeamColumn $eleTag $iNode $jNode $A $E $Iz $transfTag <-mass $massDens> <-cMass> element elasticBeamColumn 2 2 3 $A $E $I 1 pattern Plain 1 Linear { load 2 0.0 10.0 0.0 } recorder Node ZeroLength1.out disp -time -node 2 -dof 2 # integrator LoadControl 1 1 1 1 test EnergyIncr 1.0e-6 10 1 algorithm Newton numberer Plain constraints Transformation 1.0 # superLU system SparseGeneral -piv analysis Static analyze 5OSN model errors：
Domain::addSP_Constraint – cannot add as node with tag1does not have associated
constrained DOF
WARNING could not add SP_Constraint to domain using fix command – node may alrea
dy be constrained
materials.tcl
elements.tcl
WARNING ZeroLength::setDomain(): nodes 1 and 2have differing dof at ends for Zer
oLength 1compared the codes,commented the -ndf x(opensees version2.4.6 (rev 6022) ),revised the equalDof with adding dof tag of 3(sometimes I cannot add more than one dof), Revised version as following：
# compare #Translational spring # Static analysis # # Written: MHS # Date: Feb 2000 # Units: kip, in wipe # Define the model builder model BasicBuilder -ndm 2 -ndf 3 # Set some variables #set L 120 #set A 20 #set E 30000 #set I 1400 # Define nodes #node 1 0.0 0.0 #node 2 0.0 0.0 #node 3 $L 0.0 # NodeCoord.tcl <strong>#-----Commented the -ndf-----------</strong> # Node tag xCrd yCrd ndf node 1 +0.000000E+00 +0.000000E+00 ;#-ndf 1 node 2 +0.000000E+00 +0.000000E+00 ;#-ndf 2 node 3 +1.200000E+02 +0.000000E+00 ;#-ndf 3 puts "Nodes OK!!" #---------- # Define single point constraints #fix 1 1 1 1 #fix 3 1 1 1 # SPConstraint.tcl # SPC tag Dx Dy Rz fix 1 1 1 1 fix 3 1 1 1 #-----revised the equalDof with adding dof tag of 3--------------------- # # ndR ndC dofs #equalDOF 1 2 1 3 # MPConstraint.tcl # Equal DOF: MPConstraint01: mNodeTag sNodeTag dof equalDOF 1 2 1 3 #-------------------------------Domain::addSP_Constraint - cannot add as node with tag1does not have associated #constrained DOF #WARNING could not add SP_Constraint to domain using fix command - node may already be constrained puts "Constraints OK!!" #-------------------------------- # Define force-deformation relationship for spring # uniaxialMaterial ElasticPP $matTag $E $epsyP <$epsyN $eps0> ##uniaxialMaterial ElasticPP 2 1050 0.02 ##uniaxialMaterial Elastic 3 -50 # uniaxialMaterial Parallel $matTag $tag1 $tag2 ... ##uniaxialMaterial Parallel 1 2 3 # Materials.tcl puts "materials.tcl" # Material "ElasticDefault": matTag E <eta> <Eneg> uniaxialMaterial Elastic 1 +2.900000E+04 +0.000000E+00 # Material "Material01": matTag tags #uniaxialMaterial Parallel 2 3 4 # Material "Material02": matTag E epsyP epsyN eps0 uniaxialMaterial ElasticPP 3 +1.050000E+03 +2.000000E-02 -2.000000E-03 +0.000000E+00 # Material "Material03": matTag E <eta> <Eneg> uniaxialMaterial Elastic 4 -5.000000E+01 +0.000000E+00 uniaxialMaterial Parallel 2 3 4 #------------------------------- #-------------------------------- # Sections.tcl # Section "ElasticDefault": secTag E A Iz <G> <alpha> section Elastic 1 +2.900000E+04 +1.800000E+02 +4.860000E+03 +1.115400E+04 +8.333333E-01 #------------------------------------------------------------------------------------------------------- # # id ndI ndJ mat dir #element zeroLength 1 1 2 -mat 1 -dir 2 # Elements.tcl puts "elements.tcl" # Element "Element01": eleTag NodeI NodeJ -mat matTag1 matTag2 ... -dir dir1 dir2 ... <-orient x1 x2 x3 y1 y2 y3> <-doRayleigh flag> element zeroLength 1 1 2 -mat 2 -dir 2 -orient +1.000000E+00 +0.000000E+00 +0.000000E+00 +0.000000E+00 +1.000000E+00 +0.000000E+00 # Geometric transformation #geomTransf Linear 1 # GeoTran.tcl # GeoTran type tag geomTransf Linear 1 # id ndI ndJ A E I transf # element elasticBeamColumn $eleTag $iNode $jNode $A $E $Iz $transfTag <-mass $massDens> <-cMass> #element elasticBeamColumn 2 2 3 $A $E $I 1 # Element "Element02": eleTag NodeI NodeJ A E Iz geoTranTag <alpha d> <-mass massDens> <-cMass> element elasticBeamColumn 2 2 3 +2.000000E+01 +3.000000E+04 +1.400000E+03 1 +0.000000E+00 +0.000000E+00 -mass +0.000000E+00 #------------------------------------------------ # TimeSeries.tcl # TimeSeries "LinearDefault": tsTag cFactor timeSeries Linear 1 -factor +1.000000E+00 #------------------------------------------------------------- #pattern Plain 1 Linear { #load 2 0.0 10.0 0.0 #} # LoadPattern_2.tcl # LoadPattern "LoadPattern01": patternTag tsTag factor pattern Plain 1 1 -fact +1.000000E+00 { # Load nodeTag LoadValues load 2 +0.000000E+00 +1.000000E+01 +0.000000E+00 # SP nodeTag dofTag DispValue # eleLoad eleTags beamUniform Wy <Wx> # eleLoad eleTags beamPoint Py xL <Px> # eleLoad eleTags selfWeight xFactor yFactor } # #recorder Node ZeroLength1.out disp -time -node 2 -dof 2 # # Node Recorder "zerolength1.out": fileName <nodeTag> dof respType recorder Node -file StaticDefaultCase_Node_zerolength1.out_Dsp.out -time -node 2 -dof 2 disp #integrator LoadControl 1 1 1 1 #test EnergyIncr 1.0e-6 10 1 #algorithm Newton #numberer Plain #constraints Transformation 1.0 # superLU #system SparseGeneral -piv #analysis Static # AnalysisOptn_2.tcl # AnalysisOptn "StaticDefault": Type: Static # ------------------------------------------ # Constraint Handler constraints Transformation # DOF Numberer numberer Plain # System of Equations system SuperLU -piv # Convergence Test test EnergyIncr +1.000000E-06 10 0 1 # Solution Algorithm algorithm Newton # Integrator integrator LoadControl +1.000000E+00 1 +1.000000E+00 +1.000000E+00 # Analysis Type analysis Static #analyze 5 # Analyze model # ------------- analyze 5
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