Features

Overview

  • Python 3.9-3.12

  • importable from within Matlab

  • limited package requirements for BDF, OP2, and F06

  • additional features available with more packages

    • BDF/OP2:

      • h5py for HDF5 input/output support

      • PyQt5/PyQt6/PySide2/PySide6/tk/wxpython for file loading pop-up

      • QScintilla & pygments support for scripting code editor

    • OP2:

      • pandas for results/matrices for use in the Jupyter Notebook

    • F06:

      • matplotlib support for plotting

    • GUI: range of choices

      • PyQt5/PySide2

      • VTK 9

    • logging using cpylog

      • colorama for console logging

      • HTML logging for Jupyter Notebook

      • no markup when piping output to a file

      • supports overwriting logger object with user-defined logger

BDF Reader/Writer

  • Input/Output:

    • 427 cards supported including:

      • optimization

      • aero

      • thermal

      • superelements

    • small, large, double precision file reading/writing

    • pickling

    • HDF5 reading/writing

    • comments are stored

    • simplified card adding `python >>> model.add_grid(nid, xyz=[4.,5.,6.], comment='nid, cp, x, y, z') ` ` $GRID comment $grid,nid,cp,x,y,z GRID,10,,4.0,5.0,6.0 `

  • methods:

    • loads summation

    • mass properties (including NSM)

    • nodal equivalencing

    • mesh quality

      • aspect ratio, taper ratio, skew, min/max interior angle, area ratio, warp angle

      • quad collapsing

      • element deletion

    • deck merging

    • renumber

    • unit conversion

    • cutting plane

    • visualization of material coordinate systems

    • mirroring

    • solid skinning (free faces)

    • length, area, volume, mass breakdowns

  • list of cards supported…

Card Group

Cards

MATS1

MATS1

MATT1

MATT1

MATT2

MATT2

MATT3

MATT3

MATT4

MATT4

MATT5

MATT5

MATT8

MATT8

MATT9

MATT9

acmodl

ACMODL

aecomps

AECOMP, AECOMPL

aefacts

AEFACT

aelinks

AELINK

aelists

AELIST

aeparams

AEPARM

aero

AERO

aeros

AEROS

aestats

AESTAT

aesurf

AESURF

aesurfs

AESURFS

ao_element_flags

CBARAO

asets

ASET, ASET1

axic

AXIC

axif

AXIF

bconp

BCONP

bcrparas

BCRPARA

bcs

CONV, CONVM, RADBC, RADM, TEMPBC

bctadds

BCTADD

bctparas

BCTPARA

bctsets

BCTSET

bfric

BFRIC

blseg

BLSEG

bsets

BSET, BSET1

bsurf

BSURF

bsurfs

BSURFS

cMethods

EIGC, EIGP

caeros

CAERO1, CAERO2, CAERO3, CAERO4, CAERO5

convection_properties

PCONV, PCONVM

coords

CORD1C, CORD1R, CORD1S, CORD2C, CORD2R, CORD2S, GMCORD

creep_materials

CREEP

csets

CSET, CSET1

csschds

CSSCHD

csuper

CSUPER

csupext

CSUPEXT

cyax

CYAX

cyjoin

CYJOIN

dareas

DAREA

dconstrs

DCONADD, DCONSTR

ddvals

DDVAL

delays

DELAY

dequations

DEQATN

desvars

DESVAR

divergs

DIVERG

dlinks

DLINK

dload_entries

ACSRCE, QVECT, RANDPS, RANDT1, RLOAD1, RLOAD2, TLOAD1,

TLOAD2

dloads

DLOAD

dmi

DMI

dmiax

DMIAX

dmig

DMIG

dmij

DMIJ

dmiji

DMIJI

dmik

DMIK

doptprm

DOPTPRM

dphases

DPHASE

dresps

DRESP1, DRESP2, DRESP3

dscreen

DSCREEN

dtable

DTABLE

dti

DTI

dvcrels

DVCREL1, DVCREL2

dvgrids

DVGRID

dvmrels

DVMREL1, DVMREL2

dvprels

DVPREL1, DVPREL2

elements

CBAR, CBEAM, CBEAM3, CBEND, CBUSH, CBUSH1D, CBUSH2D,

CDAMP1, CDAMP2, CDAMP3, CDAMP4, CDAMP5, CELAS1, CELAS2,

CELAS3, CELAS4, CFAST, CGAP, CHBDYE, CHBDYG, CHBDYP,

CHEXA, CIHEX1, CIHEX2, CONROD, CPENTA, CPLSTN3, CPLSTN4,

CPLSTN6, CPLSTN8, CPYRAM, CQUAD, CQUAD4, CQUAD8, CQUADR,

CQUADX, CQUADX4, CQUADX8, CRAC2D, CRAC3D, CROD, CSHEAR,

CTETRA, CTRAX3, CTRAX6, CTRIA3, CTRIA6, CTRIAR, CTRIAX,

CTRIAX6, CTUBE, CVISC, GENEL

feedge

FEEDGE

feface

FEFACE

flfacts

FLFACT

flutters

FLUTTER

frequencies

FREQ, FREQ1, FREQ2, FREQ3, FREQ4, FREQ5

gmcurv

GMCURV

gmsurf

GMSURF

grdset

GRDSET

gridb

GRIDB

gusts

GUST

hyperelastic_materials

MATHE, MATHP

load_combinations

CLOAD, LOAD, LSEQ

loads

ACCEL, ACCEL1, FORCE, FORCE1, FORCE2, GMLOAD, GRAV,

LOADCYN, MOMENT, MOMENT1, MOMENT2, PLOAD, PLOAD1, PLOAD2,

PLOAD4, PLOADX1, QBDY1, QBDY2, QBDY3, QHBDY, QVOL,

RFORCE, RFORCE1, SLOAD, SPCD, TEMP

masses

CMASS1, CMASS2, CMASS3, CMASS4, CONM1, CONM2

materials

MAT1, MAT10, MAT11, MAT2, MAT3, MAT3D, MAT8, MAT9, MATG

methods

EIGB, EIGR, EIGRL

mkaeros

MKAERO1, MKAERO2

modtrak

MODTRAK

monitor_points

MONDSP1, MONPNT1, MONPNT2, MONPNT3

mpcadds

MPCADD

mpcs

MPC

nlparms

NLPARM

nlpcis

NLPCI

nodes

EPOINT, GRID, SPOINT

normals

SNORM

nsmadds

NSMADD

nsms

NSM, NSM1, NSML, NSML1

nxstrats

NXSTRAT

omits

OMIT, OMIT1

paeros

PAERO1, PAERO2, PAERO3, PAERO4, PAERO5

params

PARAM

pbusht

PBUSHT

pdampt

PDAMPT

pelast

PELAST

phbdys

PHBDY

plotels

PLOTEL

points

POINT

properties

PBAR, PBARL, PBCOMP, PBEAM, PBEAML, PBEND, PBMSECT,

PBRSECT, PBUSH, PBUSH1D, PCOMP, PCOMPG, PCOMPS, PCONEAX,

PDAMP, PDAMP5, PELAS, PFAST, PGAP, PIHEX, PLPLANE,

PLSOLID, PPLANE, PRAC2D, PRAC3D, PROD, PSHEAR, PSHELL,

PSOLID, PTUBE, PVISC

properties_mass

PMASS

pset

PSET

pval

PVAL

qsets

QSET, QSET1

radcavs

RADCAV, RADLST

radmtx

RADMTX

radset

RADSET

random_tables

TABRND1, TABRNDG

release

RELEASE

rigid_elements

RBAR, RBAR1, RBE1, RBE2, RBE3, RROD, RSPLINE, RSSCON

ringaxs

POINTAX, RINGAX

ringfl

RINGFL

rotors

ROTORD, ROTORG

se_bsets

SEBSET, SEBSET1

se_csets

SECSET, SECSET1

se_qsets

SEQSET, SEQSET1

se_sets

SESET

se_suport

SESUP

se_usets

SEQSET1

sebndry

SEBNDRY

sebulk

SEBULK

seconct

SECONCT

seelt

SEELT

seexcld

SEEXCLD

selabel

SELABEL

seload

SELOAD

seloc

SELOC

sempln

SEMPLN

senqset

SENQSET

seqgp

SEQGP

setree

SETREE

sets

SET1, SET3

spcadds

SPCADD

spcoffs

SPCOFF, SPCOFF1

spcs

GMSPC, SPC, SPC1, SPCAX

splines

SPLINE1, SPLINE2, SPLINE3, SPLINE4, SPLINE5, SPLINE6,

SPLINE7

suport

SUPORT

suport1

SUPORT1

tables

TABLEH1, TABLEHT, TABLES1, TABLEST

tables_d

TABLED1, TABLED2, TABLED3, TABLED4

tables_m

TABLEM1, TABLEM2, TABLEM3, TABLEM4

tables_sdamping

TABDMP1

tempds

TEMPD

thermal_materials

MAT4, MAT5

tics

TIC

topvar

TOPVAR

transfer_functions

TF

trims

TRIM, TRIM2

tstepnls

TSTEP1, TSTEPNL

tsteps

TSTEP

usets

USET, USET1

view3ds

VIEW3D

views

VIEW

  • Executive Control Deck

  • System Control Deck

  • Case Control Deck

  • cross-referencing to simplify accessing data

    • *_ref attributes are cross-referenced

    • element.nodes is not cross-referenced

    • element.nodes_ref is cross-referenced

  • safe cross-referencing for imperfect models

  • optional error storage to get a list of all discovered errors as once

  • model validation

OP4 Reader/Writer

  • For matrices, the OP2 is preferred. It’s simply faster.

  • Types:

    • ASCII/binary

    • Small/Big MAT format

    • Real/Complex

    • Sparse/Dense

    • Single/Double Precision

  • ASCII writer

OP2 Reader / OP2 Writer / F06 Writer

  • Supported Nastran versions:

    • MSC Nastran

    • Simcenter/NX Nastran

    • Optistruct

    • Radioss

    • IMAT

    • Autodesk Nastran/Nastran-in-CAD

      • geometry not supported

  • Input/Output:

    • Very fast OP2 reader (up to 500 MB/sec with an SSD) - Memory efficient - support directly loading into HDF5 for very large models

    • HDF5 export/import support for MATLAB integration

    • pandas support (results & matrices)

    • OP2/F06 writing

    • Most fatal errors caught (geometry input errors not caught)

    • geometry can be read directly from op2 (it’s not perfect, but it’s much faster)

  • Operations:

    • transform displacement/eigenvectors/spc/mpc/applied loads to global coordinate system

    • transform stresses/forces to material coordinate system

    • grid point forces: - freebody loads - interface loads

  • Supports:

    • superelements

    • optimization

    • mesh adaptivity

    • preload

    • shape optimization

OP2 Results

  • This is probably an incomplete list. Most results are supported.

  • Basic Tables

    • Types:

      • Displacment

      • Velocity

      • Acceleration

      • Eigenvectors

      • SPC/MPC Forces

      • Applied Loads

      • Load Vectors

      • Temperature

    • Real/Complex

    • Random; no NO (Number of Crossings) or RMS results

  • Stress/Strain

    • Real/Complex

    • Random; no NO (Number of Crossings) or RMS results

    • Types:

      • Spring, Rod, Bar, Beam, Bushing, Gap, Shell, Solid

  • Forces

    • Real/Complex

    • Types:

      • Loads: Spring, Rod, Bar, Beam, Bushing, Gap, Shell (Isotropic/Composite), Solid

      • Thermal Gradient/Flux: 1D, 2D, 3D

  • Grid Point Forces

    • Real/Complex

  • Strain Energy

    • Real/Complex

    • Types:

      • Spring, Rod, Bar, Beam, Bushing, Gap, Shell (Isotropic/Composite), Solid, Rigid, DMIG

  • Matrices

    • Basic:

      • Real/Complex

      • Sparse/Dense

      • Single/Double Precision

    • MATPOOL:

      • Real/Complex

      • Sparse/Dense

      • Single/Double Precision

  • Other

    • Eigenvalues

      • Modal, Buckling, Complex

    • Grid Point Weight

    • Monitor Points

    • Design Optimization:

      • Convergence History

      • Limited Design Responses:

        • Weight

        • Stress (Isotropic/Composite)

        • Strain (Isotropic/Composite)

        • Force

        • Flutter

Main OP2 Results

The main op2 results can be accessed directly from the op2 object (e.g., model.displacements, model.celas1_stress).

  • OUG - displacement, temperatures, eigenvectors, velocity, acceleration

  • displacements

  • velocities

  • accelerations

  • displacements_scaled

  • temperatures

  • eigenvectors

  • OQG - spc/mpc forces

  • spc_forces

  • spc_forces_v

  • spc_forces_scaled_response_spectra_nrl

  • mpc_forces

  • mpc_forces_RAQCONS

  • mpc_forces_RAQEATC

  • thermal_gradient_and_flux

  • OGF - grid point forces

  • grid_point_forces

  • OPG - summation of loads for each element

  • load_vectors

  • load_vectors_v

  • thermal_load_vectors

  • applied_loads

  • force_vectors

  • OES/OSTR

  • 0d - CELASx stress/strain

  • stress.celas1_stress

  • stress.celas2_stress

  • stress.celas3_stress

  • stress.celas4_stress

  • strain.celas1_strain

  • strain.celas2_strain

  • strain.celas3_strain

  • strain.celas4_strain

  • isotropic CROD/CONROD/CTUBE stress/strain

  • stress.crod_stress

  • stress.conrod_stress

  • stress.ctube_stress

  • strain.crod_strain

  • strain.conrod_strain

  • strain.ctube_strain

  • isotropic CBAR stress/strain

  • stress.cbar_stress

  • strain.cbar_strain

  • stress.cbar_stress_10nodes

  • strain.cbar_strain_10nodes

  • isotropic CBEAM stress/strain

  • stress.cbeam_stress

  • strain.cbeam_strain

  • nonlinear.cbeam_stress

  • CBEND

  • stress.cbend_stress

  • strain.cbend_strain

  • isotropic Isotropic Shell (PSHELL, CTRIAx/CQUADx) stress

  • stress.ctria3_stress

  • stress.ctriar_stress

  • stress.ctria6_stress

  • stress.cquadr_stress

  • stress.cquad4_stress

  • stress.cquad8_stress

  • isotropic Isotropic Shell (PSHELL, CTRIAx/CQUADx) strain

  • strain.ctria3_strain

  • strain.ctriar_strain

  • strain.ctria6_strain

  • strain.cquadr_strain

  • strain.cquad4_strain

  • strain.cquad8_strain

  • isotropic Solid (CTETRA/CHEXA/CPENTA) stress/strain

  • stress.ctetra_stress

  • stress.chexa_stress

  • stress.cpenta_stress

  • strain.ctetra_strain

  • strain.chexa_strain

  • strain.cpenta_strain

  • CSHEAR stress/strain

  • stress.cshear_stress

  • strain.cshear_strain

  • GAPNL 86

  • nonlinear.cgap_stress

  • CBUSH 226

  • cbush1d_stress_strain

  • nonlinear.cbush_stress

  • nonlinear.cbush1d_stress_strain

  • stress.cplstn3_stress

  • stress.cplstn4_stress

  • stress.cplstn6_stress

  • stress.cplstn8_stress

  • stress.cplsts3_stress

  • stress.cplsts4_stress

  • stress.cplsts6_stress

  • stress.cplsts8_stress

  • strain.cplstn3_strain

  • strain.cplstn4_strain

  • strain.cplstn6_strain

  • strain.cplstn8_strain

  • strain.cplsts3_strain

  • strain.cplsts4_strain

  • strain.cplsts6_strain

  • strain.cplsts8_strain

  • CTRIAX6

  • stress.ctriax_stress

  • strain.ctriax_strain

  • stress.cbush_stress

  • strain.cbush_strain

  • nonlinear CROD/CONROD/CTUBE stress

  • nonlinear.crod_stress

  • nonlinear.crod_strain

  • nonlinear.ctube_stress

  • nonlinear.ctube_strain

  • nonlinear.conrod_stress

  • nonlinear.conrod_strain

  • CEALS1 224, CELAS3 225

  • nonlinear.celas1_stress

  • nonlinear.celas3_stress

  • composite CTRIA3/CQUAD4 stress

  • stress.cquad4_composite_stress

  • stress.cquad8_composite_stress

  • stress.cquadr_composite_stress

  • stress.ctria3_composite_stress

  • stress.ctria6_composite_stress

  • stress.ctriar_composite_stress

  • strain.cquad4_composite_strain

  • strain.cquad8_composite_strain

  • strain.cquadr_composite_strain

  • strain.ctria3_composite_strain

  • strain.ctria6_composite_strain

  • strain.ctriar_composite_strain

  • OESNLXR - CTRIA3/CQUAD4 stress

  • nonlinear.cquad4_stress

  • nonlinear.ctria3_stress

  • nonlinear.cquad4_strain

  • nonlinear.ctria3_strain

  • strain.hyperelastic_cquad4_strain

  • OESNLXR - solids

    • nonlinear.ctetra_stress_strain

    • nonlinear.cpenta_stress_strain

    • nonlinear.chexa_stress_strain

  • PVT

  • params

  • LAMA

  • eigenvalues

  • HISADD

  • convergence_history

  • R1TABRG

-response1_table

  • OEF - Forces

  • 0-d

  • force.celas1_force

  • force.celas2_force

  • force.celas3_force

  • force.celas4_force

  • force.cvisc_force

  • force.coneax_force

  • force.cdamp1_force

  • force.cdamp2_force

  • force.cdamp3_force

  • force.cdamp4_force

  • force.cgap_force

  • rod

  • force.crod_force

  • force.conrod_force

  • force.ctube_force

  • bar/beam

  • force.cbar_force

  • abs.cbar_force

  • srss.cbar_force

  • nrl.cbar_force

  • force.cbar_force_10nodes

  • force.cbeam_force

  • force.cbeam_force_vu (removed)

  • force.cbush_force

  • force.cbend_force

  • shell

  • force.cquad4_force

  • force.cquad8_force

  • force.cquadr_force

  • force.ctria3_force

  • force.ctria6_force

  • force.ctriar_force

  • force.cshear_force

  • solid

  • force.chexa_pressure_force

  • force.cpenta_pressure_force

  • force.ctetra_pressure_force

  • force.vu_quad_force (removed)

  • force.vu_tria_force (removed)

  • OEF - Fluxes

  • conv_thermal_load

  • chbdye_thermal_load

  • chbdye_thermal_load_flux

  • chbdyg_thermal_load

  • chbdyg_thermal_load_flux

  • chbdyp_thermal_load

  • chbdyp_thermal_load_flux

  • thermalLoad_1D

  • crod_thermal_load

  • crod_thermal_load_flux

  • cbeam_thermal_load

  • cbeam_thermal_load_flux

  • ctube_thermal_load

  • ctube_thermal_load_flux

  • conrod_thermal_load

  • conrod_thermal_load_flux

  • cbar_thermal_load

  • cbar_thermal_load_flux

  • cbend_thermal_load

  • cbend_thermal_load_flux

  • thermalLoad_2D_3D

  • cquad4_thermal_load

  • cquad4_thermal_load_flux

  • ctriax6_thermal_load

  • ctriax6_thermal_load_flux

  • cquad8_thermal_load

  • cquad8_thermal_load_flux

  • ctria3_thermal_load

  • ctria3_thermal_load_flux

  • ctria6_thermal_load

  • ctria6_thermal_load_flux

  • ctetra_thermal_load

  • ctetra_thermal_load_flux

  • chexa_thermal_load

  • chexa_thermal_load_flux

  • cpenta_thermal_load

  • cpenta_thermal_load_flux

  • thermal_load_VU (removed)

  • thermal_load_VU_3D (removed)

  • vu_beam_thermal_load (removed)

  • OEFIT - Failure Indices

  • cquad4_composite_force_failure_indicies

  • cquad8_composite_force_failure_indicies

  • ctria3_composite_force_failure_indicies

  • ctria6_composite_force_failure_indicies

  • OGS1 - Grid Point Stresses

  • grid_point_surface_stresses

  • grid_point_stresses_volume_direct

  • grid_point_stresses_volume_principal

  • grid_point_stress_discontinuities

  • OEE - Strain Energy Density

  • strain_energy.cquad4_strain_energy

  • strain_energy.cquad8_strain_energy

  • strain_energy.cquadr_strain_energy

  • strain_energy.cquadx_strain_energy

  • strain_energy.ctria3_strain_energy

  • strain_energy.ctria6_strain_energy

  • strain_energy.ctriar_strain_energy

  • strain_energy.ctriax_strain_energy

  • strain_energy.ctriax6_strain_energy

  • strain_energy.cshear_strain_energy

  • strain_energy.ctetra_strain_energy

  • strain_energy.cpenta_strain_energy

  • strain_energy.chexa_strain_energy

  • strain_energy.cpyram_strain_energy

  • strain_energy.crod_strain_energy

  • strain_energy.ctube_strain_energy

  • strain_energy.conrod_strain_energy

  • strain_energy.cbar_strain_energy

  • strain_energy.cbeam_strain_energy

  • strain_energy.cgap_strain_energy

  • strain_energy.cbush_strain_energy

  • strain_energy.celas1_strain_energy

  • strain_energy.celas2_strain_energy

  • strain_energy.celas3_strain_energy

  • strain_energy.celas4_strain_energy

  • strain_energy.cdum8_strain_energy

  • strain_energy.cbend_strain_energy

  • strain_energy.dmig_strain_energy

  • strain_energy.genel_strain_energy

  • strain_energy.conm2_strain_energy

  • strain_energy.rbe1_strain_energy

  • strain_energy.rbe3_strain_energy

  • strain_energy.seam_strain_energy

  • unused?

  • displacement_scaled_response_spectra_nrl

  • displacement_scaled_response_spectra_abs

  • displacement_scaled_response_spectra_srss

  • velocity_scaled_response_spectra_abs

  • acceleration_scaled_response_spectra_nrl

  • acceleration_scaled_response_spectra_abs

OP2.Results()

The OP2.Results() are accessed using model.results. as a prefix (e.g., model.results.modal_contribution.celas1_stress).

  • eqexin

  • gpdt

  • bgpdt

  • ato # AutoCorrelationObjects() - see below

  • psd # PowerSpectralDensityObjects() - see below

  • rms # RootMeansSquareObjects() - see below

  • no # NumberOfCrossingsObjects() - see below

  • crm # CumulativeRootMeansSquareObjects() - see below

  • stress

  • strain

  • force

  • strain_energy

  • modal_contribution

    • celas1_stress

    • celas2_stress

    • celas3_stress

    • celas4_stress

    • celas1_strain

    • celas2_strain

    • celas3_strain

    • celas4_strain

    • crod_stress

    • conrod_stress

    • ctube_stress

    • crod_strain

    • conrod_strain

    • ctube_strain

    • ctetra_stress

    • cpenta_stress

    • chexa_stress

    • ctetra_strain

    • cpenta_strain

    • chexa_strain

    • cbar_stress

    • cbar_strain

    • cbeam_stress

    • cbeam_strain

    • ctria3_stress

    • ctria6_stress

    • cquad4_stress

    • cquad8_stress

    • cquadr_stress

    • ctriar_stress

    • ctria3_strain

    • ctria6_strain

    • cquad4_strain

    • cquad8_strain

    • cquadr_strain

    • ctriar_strain

    • cquad4_composite_stress

    • cquad8_composite_stress

    • cquadr_composite_stress

    • ctria3_composite_stress

    • ctria6_composite_stress

    • ctriar_composite_stress

    • cquad4_composite_strain

    • cquad8_composite_strain

    • cquadr_composite_strain

    • ctria3_composite_strain

    • ctria6_composite_strain

    • ctriar_composite_strain

    • cshear_stress

    • cshear_strain

    • cshear_force

    • cbush_stress

    • cbush_strain

  • strength_ratio

    • cquad4_composite_stress

    • cquad8_composite_stress

    • cquadr_composite_stress

    • ctria3_composite_stress

    • ctria6_composite_stress

    • ctriar_composite_stress

    • cquad4_composite_strain

    • cquad8_composite_strain

    • cquadr_composite_strain

    • ctria3_composite_strain

    • ctria6_composite_strain

    • ctriar_composite_strain

  • ROUGV1 # relative disp/vel/acc/eigenvectors

    • displacements

    • velocities

    • accelerations

    • eigenvectors

  • RADEFFM

    • eigenvectors

  • RADCONS

    • eigenvectors

  • RAFCONS

    • cbar_force

    • cquad4_force

    • cbush_force

  • RASCONS

    • ctetra_stress

    • cpenta_stress

    • chexa_stress

    • ctetra_strain

    • cpenta_strain

    • chexa_strain

    • ctria3_stress

    • ctria6_stress

    • cquad4_stress

    • cquad8_stress

    • cquadr_stress

    • ctriar_stress

    • ctria3_strain

    • ctria6_strain

    • cquad4_strain

    • cquad8_strain

    • cquadr_strain

    • ctriar_strain

  • RAECONS

    • ctria3_strain

    • cquad4_strain

    • chexa_strain

  • RAGCONS

    • grid_point_forces

  • RAPCONS

    • cquad4_composite_stress

    • cquad8_composite_stress

    • cquadr_composite_stress

    • ctria3_composite_stress

    • ctria6_composite_stress

    • ctriar_composite_stress

  • RANCONS

    • cbar_strain_energy

    • cbush_strain_energy

    • chexa_strain_energy

    • ctria3_strain_energy

    • cquad4_strain_energy

  • RADEATC

    • eigenvectors

  • RAFEATC

    • cbar_force

    • cquad4_force

    • cbush_force

  • RASEATC

    • chexa_stress

    • cquad4_stress

  • RAEEATC

    • chexa_strain

    • ctria3_strain

    • cquad4_strain

  • RAGEATC

    • grid_point_forces

  • RAPEATC

    • cquad4_composite_stress

    • cquad8_composite_stress

    • cquadr_composite_stress

    • ctria3_composite_stress

    • ctria6_composite_stress

    • ctriar_composite_stress

  • RANEATC

    • cbar_strain_energy

    • cbush_strain_energy

    • chexa_strain_energy

    • ctria3_strain_energy

    • cquad4_strain_energy

All of these results have the same outputs (shown under model.results.crm). For example, model.results.ato.displacements, model.results.crm.displacements.

  • ato # AutoCorrelationObjects()

  • psd # PowerSpectralDensityObjects()

  • rms # RootMeansSquareObjects()

  • no # NumberOfCrossingsObjects()

  • crm # CumulativeRootMeansSquareObjects()

    • displacements

    • velocities

    • accelerations

    • load_vectors

    • spc_forces

    • mpc_forces

    • crod_force

    • conrod_force

    • ctube_force

    • cbar_force

    • cbeam_force

    • cbush_stress

    • cbush_strain

    • crod_stress

    • conrod_stress

    • ctube_stress

    • cbar_stress

    • cbeam_stress

    • crod_strain

    • conrod_strain

    • ctube_strain

    • cbar_strain

    • cbeam_strain

    • ctetra_strain

    • cpenta_strain

    • chexa_strain

    • ctetra_stress

    • cpenta_stress

    • chexa_stress

    • celas1_stress

    • celas2_stress

    • celas3_stress

    • celas4_stress

    • celas1_strain

    • celas2_strain

    • celas3_strain

    • celas4_strain

    • celas1_force

    • celas2_force

    • celas3_force

    • celas4_force

    • ctria3_force

    • ctria6_force

    • ctriar_force

    • cquad4_force

    • cquad8_force

    • cquadr_force

    • ctria3_stress

    • ctria6_stress

    • cquad4_stress

    • cquad8_stress

    • cquadr_stress

    • ctriar_stress

    • ctria3_strain

    • ctria6_strain

    • cquad4_strain

    • cquad8_strain

    • cquadr_strain

    • ctriar_strain

    • cbend_stress

    • cbend_strain

    • cbend_force

    • cshear_stress

    • cshear_strain

    • cshear_force

    • cbush_force

    • cdamp1_force

    • cdamp2_force

    • cdamp3_force

    • cdamp4_force

    • cvisc_force

    • cquad4_composite_stress

    • cquad8_composite_stress

    • cquadr_composite_stress

    • ctria3_composite_stress

    • ctria6_composite_stress

    • ctriar_composite_stress

    • cquad4_composite_strain

    • cquad8_composite_strain

    • cquadr_composite_strain

    • ctria3_composite_strain

    • ctria6_composite_strain

    • ctriar_composite_strain

Matrices with explicit methods

These are simply accessor methods to various matrices. For example, model.total_effective_mass_matrix is the same as self.matrices['EFMFSMS'].

  • total_effective_mass_matrix (EFMFSMS)

  • effective_mass_matrix (EFMASSS)

  • rigid_body_mass_matrix (RBMASS)

  • modal_effective_mass_fraction (EFMFACS)

  • modal_participation_factors (MPFACS)

  • modal_effective_mass (MEFMASS)

  • modal_effective_weight (MEFWTS)

F06 Plotter

  • flutter (SOL 145) parser

    • Supports:

      • multiple subcases

      • PK and PKNL methods

    • plot_Vg_Vf(…), plot_Vg(…), plot_root_locus(…)

    • input/output units

GUI

[GUI](http://pynastran-git.readthedocs.io/en/latest/quick_start/gui.html)

  • buttons for picking, rotation center, distance, min/max

  • GUI Features:

    • color coded logging

    • legend menu

      • min/max control

      • number of labels/colors

      • additional color maps

      • legend position

    • animation menu

      • mix and match fringe/displacement/vector results (e.g., stress shown on a displaced model)

      • Real/Complex Results

        • Scale factor

        • Phase

        • Time

      • Multiple Animation Profiles

      • Where:

        • in GUI

        • exported gif

    • node/element highlighting

    • element groups

    • high resolution screenshots

    • nodal/centroidal picking

    • coordinate systems

    • results sidebar

    • custom user results

      • nodal fringe

      • centroidal fringe

      • deflection

      • nodal vector results (e.g., SPC forces)

    • preferences menu

Nastran Specific Features

  • multiple OP2s

  • deflection plots

  • SOL 200 support

  • geometry

    • all elements supported in BDF

  • bar profile visualzation

    • 3D

    • dimensional vectors

  • aero models

    • CAERO panels & subpanels

    • sideslip coordinate systems support

  • mass elements

  • plotting elements (e.g., PLOTEL)

  • nominal geometry (useful for deflection plots)

Nastran Geometry Results

  • node id

  • element id

  • property id

    • PSHELL breakdown

      • thickness, ts/t, 12I/t^3

      • for each material:

        • material id

        • stiffnesses

        • is_isotropic

    • PCOMP breakdown

      • total thickness

      • for each layer:

        • thickness

        • material id

        • stiffnesses

        • is_isotropic

    • PSOLID breakdown

      • material id

      • stiffnesses

      • is_isotropic

  • loads

  • optimization

  • design regions

  • current value

  • lower/upper bounds

  • mesh quality:

    • area, min/max interior angle, skew angle, aspect ratio, taper ratio, warp angle results

Nastran OP2 Results

  • solution types:

    • analysis types:

      • static

      • modal

      • frequency response

      • load step

    • additional model complexity

      • optimization

      • preload

  • result quantities:

    • displacement, velocity, acceleration, eigenvectors

    • SPC/MPC forces

    • applied loads

    • temperature

    • stress/strain

    • strain energy

    • limited element forces

    • thermal gradient/flux

Converters / Additional GUI Options

pyNastran’s code base makes it easy to develop other useful tools that make use of common code. As such, additional formats are supported in terms of readers/writers/converters/viewing, but are not a main focus.

These include:

  • Abaqus

  • AFLR

  • AVL

  • Cart3d

  • Panair

  • S/HABP

  • LAWGS

  • FAST

  • STL

  • SU2

  • Tetgen

  • Tecplot

  • Usm3d