Mapping Commands from Old to New FLAC2D Syntax

This document lists commands from FLAC 8.1 (and earlier) and provides links to their FLAC2D 9 (and later) counterparts. Tip: using page search for the browser (Ctrl+F) can help locate a command quickly; the list below is extensive.

Table 1: Index For This Page: Commands by Function vs 8.1 Command

Boundary Conditions Applied at Gridpoints

APPLY

Boundary Conditions Applied at Faces

APPLY

Remove Boundary Conditions

APPLY

Zone Attachment

ATTACH

General Program, Model, and Utility Operations

CALL, CONFIG, CONTINUE, CYCLE, DEFINE/END, ECHO, EXIT, HELP, LOAD, NEW, PAUSE, PLAYBACK, QUIT, RESTORE, RETURN, SAVE, SOLVE, STEP, STOP, SYSTEM, TABLE, TITLE, TRACE, TRACK

Set & Remove Gridpoint and Zone Conditions

FIX, FREE

Zone Generation Operations

GENERATE, GRID

Group Command

GROUP

History Operations

HISTORY

Initialization Operations

INITIAL

Interface Operations

INTERFACE

Print Operations

PRINT

Constitutive Model Assignment and Properties

MODEL, PROPERTY

Configuration Operations

SET

Structural Element Operations

STRUCT

Fluid-Flow Analysis Operations & Utilities

WATER, CONFIG, TRACK

Table 2: Boundary Conditions Applied at Gridpoints

FLAC 8.1

FLAC2D 9.0

APPLY ff

zone dynamic free-field

APPLY nacc

zone face apply acceleration-normal

APPLY nvelocity

zone face apply velocity-normal

APPLY relax

zone relax (note: this is not exactly equivalent. See zone relax for details.)

APPLY saccel

zone face apply acceleration-strike

APPLY svelocity

zone face apply velocity-strike

APPLY xaccel

zone face apply acceleration-x

APPLY xforce

zone gridpoint fix force-applied-x

APPLY xvelocity

zone face apply velocity-x

APPLY yaccel

zone face apply acceleration-y

APPLY yforce

zone gridpoint fix force-applied-y

APPLY yvelocity

zone face apply velocity-y

FLUID-FLOW BOUNDARIES

APPLY pp

zone face apply pore-pressure

APPLY pwell

zone gridpoint fix well

APPLY nwdischarge

no equivalent. Two-phase flow not supported.

APPLY nwpp

no equivalent. Two-phase flow not supported.

THERMAL BOUNDARIES

APPLY temperature

zone face apply temperature

Table 3: Boundary Conditions Applied at Faces

FLAC 8.1

FLAC2D 9.0

APPLY dquiet

zone face apply quiet-dip

APPLY dstress

zone face apply stress-dip

APPLY nquiet

zone face apply quiet-normal

APPLY nstress

zone face apply stress-normal

APPLY pressure

zone face apply stress-normal (note: there is no direct equivalent. zone face apply stress-normal assumes compression negative.)

APPLY squiet

zone face apply quiet-strike

APPLY sstress

zone face apply stress-strike

APPLY sxx

zone face apply stress-xx

APPLY sxy

zone face apply stress-xy

APPLY syy

zone face apply stress-yy

APPLY xquiet

zone face apply quiet (note: not a direct equivalent. Quiet boundaries cannot be specified by component in FLAC2D)

APPLY xtraction

zone face apply stress-xx

APPLY yquiet

zone face apply quiet (note: not a direct equivalent. Quiet boundaries cannot be specified by component in FLAC2D)

APPLY ytraction

zone face apply stress-yy

FLUID-FLOW BOUNDARIES

APPLY discharge

zone face apply discharge

APPLY leakage

zone face apply leakage

THERMAL BOUNDARIES

APPLY convection

zone face apply convection

APPLY flux

zone face apply flux

Table 4: Remove Boundary Conditions

FLAC 8.1

FLAC2D 9.0

APPLY remove <keyword>

zone face apply-remove, zone apply-remove, or zone gridpoint free (un- fix) in opposition to the apply-type command used to create the boundary, as listed above

Table 5: Zone Attachment

FLAC 8.1

FLAC2D 9.0

ATTACH

zone attach by-face

ATTACH remove

zone attach delete

Table 6: General Program, Model, and Utility Operations

FLAC 8.1

FLAC2D 9.0

CALL

program call

CONFIG ats

no direct equivalent. See zone water commands with keyword effective.

CONFIG axisymmetry

model configure axisymmetry

CONFIG cppudm

model configure plugin

CONFIG creep

model configure creep

CONFIG dynamic

model configure dynamic

CONFIG extra

no longer required. 128 extra variables available by default.

CONFIG gwflow

model configure fluid-flow

CONFIG p_stress

no equivalent. Plane stress not supported.

CONFIG thermal

model configure thermal

CONFIG tpflow

no equivalent. Two-phase flow not supported.

CONTINUE

program continue

COPY

no equivalent

CYCLE

model cycle

DEFINE … END

fish define and end (note end is a statement, not a command, so it is not preceded by fish)

GUI

no equivalent

HELP

help

IEBOUNDARY

no equivalent

MOVIE

plot movie. Plot name must be given as a string.

NEW

model new

OPT

no equivalent

PAUSE

program pause

PLOT

plot item

QUIT

program quit

RESTORE

model restore

RETURN

program return

SAVE

model save

SCNLIN

no equivalent

SOLVE

model solve

SOLVE fos

model factor-of-safety

STEP

model step

STOP

program stop

SYSTEM

program system

TABLE

table add (and associated commands)

TITLE

model title

TRACK

zone fluid track

WINDOW

plot export bitmap size. Note that a plot name must be given as a string.

Table 7: Set & Remove Gridpoint and Zone Conditions

FLAC 8.1

FLAC2D 9.0

FIX/FREE pp

zone gridpoint fix pore-pressure, zone gridpoint free pore-pressure

FIX/FREE nwpp

no equivalent. Two-phase flow not supported.

FIX/FREE saturation

no equivalent

FIX/FREE seepage

no equivalent. Two-phase flow not supported.

FIX/FREE temperature

zone gridpoint fix temperature, zone gridpoint free temperature

FIX/FREE x

zone gridpoint fix velocity-x, zone gridpoint free velocity-x

FIX/FREE y

zone gridpoint fix velocity-y, zone gridpoint free velocity-y

Table 8: Zone Generation Operations

FLAC 8.1

FLAC2D 9.0

GENERATE

no true equivalent. See zone create and zone generate

GRID

zone create quad

MARK

no direct equivalent. See zone gridpoint group

REZONE

no equivalent. Rezoning not supported.

UNMARK

no direct equivalent. See zone gridpoint group remove

Table 9: Group Command

FLAC 8.1

FLAC2D 9.0

GROUP

zone group

Table 10: History Operations

FLAC 8.1

FLAC2D 9.0

HISTORY

Adding a history on an object is done through the object; for instance, zone history or structure node history or fish history, etc. Histories at gridpoints are done using the gridpointid or position keywords in the zone history command.

:literal:`  Zone and Gridpoint Histories`

HISTORY angle

no equivalent

HISTORY esxx

zone history stress-effective xx

HISTORY esxy

zone history stress-effective xy

HISTORY esyy

zone history stress-effective yy

HISTORY eszz

zone history stress-effective zz

HISTORY ex_n

zone history extra. USe keyword index to specify the index.

HISTORY gpp

zone history pore-pressure

HISTORY hyst

no equivalent

HISTORY gpp

zone history pore-pressure. Use keyword gridpointid to specify a specific gridpoint.

HISTORY property

zone history property

HISTORY sig1

zone history stress. Use keyword quantity minimum.

HISTORY sig2

zone history stress. Use keyword quantity maximum.

HISTORY ssi

no equivalent

HISTORY ssi3d

zone history strain-increment. Use keyword :lkwd`quantity shear-maximum`

HISTORY ssr

no equivalent

HISTORY ssr3d

zone history strain-rate. Use keyword :lkwd`quantity shear-maximum`

HISTORY sxx

zone history stress. Use keyword quantity xx

HISTORY sxy

zone history stress. Use keyword quantity xy

HISTORY syy

zone history stress. Use keyword quantity yy

HISTORY szz

zone history stress. Use keyword quantity zz

HISTORY temperature

zone history temperature

HISTORY vsi

zone history strain-increment. Use keyword quantity volumetric

HISTORY vsr

zone history strain-rate. Use keyword quantity volumetric

HISTORY vsxx

no equivalent

HISTORY vsxy

no equivalent

HISTORY vsyy

no equivalent

HISTORY vszz

no equivalent

HISTORY x

no equivalent

HISTORY xacceleration

zone history acceleration-x

HISTORY xdisplacement

zone history displacement-x

HISTORY xvelocity

zone history velocity-x

HISTORY y

no equivalent

HISTORY yacceleration

zone history acceleration-y

HISTORY ydisplacement

zone history displacement-y

HISTORY yvelocity

zone history velocity-y

:literal:`  Structural Element Histories`

HISTORY element

Command depends on element type, e.g. structure beam history

HISTORY node

structure node history

:literal:`  Global Histories`

HISTORY crtime

model history creep time-total

HISTORY dytime

model history dynamic time-total

HISTORY gwtime

model history fluid time-total

HISTORY thtime

model history thermal time-total

HISTORY dt

model history timestep

HISTORY delete

history delete

HISTORY dump

history list series

HISTORY hist_rep

history interval

HISTORY label

history.name a label (see history name label)

HISTORY limits

history list limit

HISTORY list

history list series

HISTORY max

no equivalent

HISTORY ncycle

history interval

HISTORY nstep

history interval

HISTORY purge

history purge

HISTORY reset

history delete

HISTORY read

no equivalent

HISTORY write

history list series

HISTORY sratio

model history mech ratio

HISTORY unbalance

model history mech unbalanced-maximum

Table 11: Initialization Operations

FLAC 8.1

FLAC2D 9.0

INITIAL biot_modulus

zone gridpoint initialize biot-modulus

INITIAL dy_damp

zone dynamic damping

INITIAL density

zone initialize density

INITIAL ex_n

zone initialize extra or zone gridpoint initialize extra

INITIAL f2modulus

no equivalent. Two-phase flow not supported.

INITIAL fmodulus

zone gridpoint initialize fluid-modulus

INITIAL ftension

zone gridpoint initialize fluid-tension

INITIAL k0

zone initialize-stresses. Use keyword ratio.

INITIAL nwpp

no equivalent. Two-phase flow not supported.

INITIAL pp

zone gridpoint initialize pore-pressure

INITIAL rsat

no equivalent. Two-phase flow not supported.

INITIAL saturation

zone gridpoint initialize saturation

INITIAL st_damp

zone mechanical damping

INITIAL sxx

zone initialize stress-xx

INITIAL sxy

zone initialize stress-xy

INITIAL syy

zone initialize stress-yy

INITIAL szz

zone initialize stress-zz

INITIAL temperature

zone gridpoint initialize temperature

INITIAL udcoe

no equivalent. Two-phase flow not supported.

INITIAL vga

TO BE DECIDED

INITIAL vgp0

TO BE DECIDED

INITIAL vgpcnw

TO BE DECIDED

INITIAL vgpcw

TO BE DECIDED

INITIAL visrat

no equivalent. Two-phase flow not supported.

INITIAL wk11

TO BE DECIDED

INITIAL wk12

TO BE DECIDED

INITIAL wk22

TO BE DECIDED

INITIAL wpermeability

TO BE DECIDED

INITIAL x

zone gridpoint initialize position-x

INITIAL xdisplacement

zone gridpoint initialize displacement-x

INITIAL xvelocity

zone gridpoint initialize velocity-x

INITIAL y

zone gridpoint initialize position-y

INITIAL ydisplacement

zone gridpoint initialize displacement-y

INITIAL yvelocity

zone gridpoint initialize velocity-y

Table 12: Interface Operations

FLAC 8.1

FLAC2D 9.0

in 8.1 syntax
integer i is supplied
where 1 appears in this column

in 9.0 syntax
i is a string
(that may be a numeral)

INTERFACE 1 aside …

no direct translation;
see zone interface create by-face for alternative construction

INTERFACE 1 from node …

no direct translation;
see zone interface create by-face for alternative construction

INTERFACE 1 cohesion

zone interface '1' node property cohesion
(see zone interface node property)

INTERFACE 1 dilation

zone interface '1' node property dilation
(see zone interface node property)

INTERFACE 1 friction

zone interface '1' node property friction
(see zone interface node property)

INTERFACE 1 glued

no equivalent

INTERFACE 1 kn

zone interface '1' node property stiffness-normal
(see zone interface node property)

INTERFACE 1 ks

zone interface '1' node property stiffness-shear
(see zone interface node property)

INTERFACE 1 tbond

zone interface '1' node property tension
(see zone interface node property)

INTERFACE 1 unglued

no equivalent

INTERFACE 1 bslip

zone interface '1' node property bonded-slip
(see zone interface node property)

INTERFACE 1 sbratio

zone interface '1' node property shear-bond-ratio
(see zone interface node property)

INTERFACE 1 remove

zone interface '1' element delete
(see zone interface element delete)

Table 13: Label Operations

FLAC 8.1

FLAC2D 9.0

LABEL arrow

data label create arrow

LABEL line

no equivalent.

LABEL plot

data label create text

LABEL table

table label

LABEL delete

data label delete

LABEL history

no direct equivalent. See plot item with keyword history-locations.

the first four above optionally take an index with the “id” keyword (i.e., LABEL id 1 arrow),

in which case the corresponding translation is
data label create name "1" arrow,
where the index is now a string (that may be a numeral)

Table 14: Constitutive Model Assignment and Properties

FLAC 8.1

FLAC2D 9.0

MODEL

zone cmodel assign

PROPERTY

zone property (and also see zone property-distribution)

Table 15: Print Operations

FLAC 8.1

FLAC2D 9.0

PRINT apply

zone list apply or zone face list apply

PRINT attach

zone attach list

PRINT density

zone list density

PRINT dy_damp

model dynamic list

PRINT dy_state

zone list state

PRINT esxx

zone list stress-effective

PRINT esxy

zone list stress-effective

PRINT esyy

zone list stress-effective

PRINT eszz

zone list stress-effective

PRINT ex_n

zone gridpoint list extra or zone list extra

PRINT f2modulus

no equivalent. Two-phase flow not supported.

PRINT fastflow

model fluid list

PRINT fastwb

no equivalent

PRINT fish

fish list

PRINT fishcall

fish list callbacks

PRINT fix

zone gridpoint list fluid

PRINT fluid

model fluid list

PRINT fmodulus

zone gridpoint list fluid

PRINT ftension

zone gridpoint list fluid

PRINT funsat

no equivalent

PRINT giicpath

no equivalent

PRINT gpm

zone gridpoint list information (note: actual mass is given, not inverse)

PRINT gpp

zone gridpoint list fluid

PRINT group

group list

PRINT head

no equivalent

PRINT history

history list

PRINT hyst

zone list hysteretic

PRINT iface 1

zone interface "1" list (see zone interface list) or zone interface node "1" list (see zone interface list)

PRINT information

program list information

PRINT jrepath

no equivalent

PRINT label

data label list

PRINT limits

model mechanical list

PRINT mark

no equivalent

PRINT memory

program list memory

PRINT model

program list plugins

PRINT nfunstep

no equivalent

PRINT nwpp

no equivalent. Two-phase flow not supported.

PRINT permeability

zone fluid list property permeability

PRINT poro

zone fluid list property porosity

PRINT pp

zone gridpoint list fluid

PRINT rsat

no equivalent. Two-phase flow not supported.

PRINT saturation

zone gridpoint list fluid

PRINT sdif

no equivalent

PRINT sig1

zone list principal

PRINT sig2

zone list principal

PRINT sratio

no equivalent

PRINT ssi

no equivalent

PRINT ssi3d

zone list strain

PRINT ssr

no equivalent

PRINT ssr3d

zone list strain

PRINT state

zone list state

PRINT structure beam

structure beam list

PRINT structure cable

structure cable list

PRINT structure hinge

no equivalent

PRINT structure liner

structure liner list

PRINT structure node

structure node list

PRINT structure pile

structure pile list

PRINT structure property

structure beam list propery, structure cable list property , etc.

PRINT structure rockbolt

structure pile list

PRINT structure shell

structure shell list

PRINT structure strip

structure geogrid list

PRINT structure support

no equivalent

PRINT sxx

zone list stress, use zone list triangle stress for information about individual overlapping triangles in a zone.

PRINT sxy

zone list stress, use zone list triangle stress for information about individual overlapping triangles in a zone.

PRINT syy

zone list stress, use zone list triangle stress for information about individual overlapping triangles in a zone.

PRINT szz

zone list stress, use zone list triangle stress for information about individual overlapping triangles in a zone.

PRINT table 1

table "1" list (see table list)

PRINT temperature

zone gridpoint list temperature

PRINT theta

no equivalent

PRINT track

zone fluid track list

PRINT udcoe

no equivalent. Two-phase flow not supported.

PRINT version

program list version

PRINT vga

to be decided

PRINT vgp0

to be decided

PRINT vgpcnw

to be decided

PRINT vgpcw

to be decided

PRINT vcirat

no equivalent. Two-phase flow not supported

PRINT vol_strain

no equivalent

PRINT vsi

no equivalent

PRINT vsr

no equivalent

PRINT vsxx

no equivalent?

PRINT vsxy

no equivalent?

PRINT vsyy

no equivalent?

PRINT vszz

no equivalent?

PRINT wk11

to be decided

PRINT wk12

to be decided

PRINT wk22

to be decided

PRINT wpermeability

to be decided

PRINT x

zone gridpoint list position

PRINT xacc

zone gridpoint list acceleration

PRINT xdisp

zone gridpoint list displacement

PRINT xflow

no equivalent

PRINT xreaction

zone gridpoint list force ??

PRINT xvel

zone gridpoint list velocity

PRINT y

zone gridpoint list position

PRINT yacc

zone gridpoint list acceleration

PRINT ydisp

zone gridpoint list displacement

PRINT yflow

no equivalent

PRINT yreaction

zone gridpoint list force ??

PRINT yvel

zone gridpoint list velocity

PRINT $fish

no equivalent

zone properties can be printed using zone list property

Table 16: Configuration Operations

FLAC 8.1

FLAC2D 9.0

SET 3d_damping

no equivalent

SET a_us

no equivalent

SET a3

no equivalent

SET a4

no equivalent

SET aspect

no equivalent

SET ats

no direct equivalent. See zone water commands with keyword effective.

SET aunb

model solve unbalanced-average

SET autoname

no equivalent

SET back

plot background. The specific plot must be specified with a string.

SET beep

no equivalent

SET biot

zone fluid biot

SET cd

See program system

SET clock

model solve clock

SET columns

no equivalent

SET corr_ffrot

no equivalent

SET crdt

model creep timestep

SET creeptime

model creep time-total

SET cust1

program customer-title-1

SET cust2

program customer-title-1

SET damping

zone mechanical damping

SET datum

no equivalent

SET display

model display

SET doswindow

no equivalent

SET dxf

See geometry import and other geometry commands.

SET dy_damping

zone dynamic damping

SET dydt

model dynamic timestep

SET dyn

model dynamic

SET dytime

model dynamic time-total

SET echo

program echo

SET fastflow

zone fluid fastflow

SET fastwb

no equivalent (yet)

SET ficolor no equivalent

SET fishcall

fish callback

SET flow

model fluid

SET fobl

model creep timestep lower-bound

SET fobu

model creep timestep upper-bound

SET force

model solve unbalanced-maximum

SET foreground See different :cmd`plot` commands

SET fos_step

model factor-of-safety characteristic-steps

SET fpcoef

zone fluid fastflow-relaxation

SET funsat

no equivalent

SET giicpath

no equivalent

SET gravity

model gravity

SET gwdt

model fluid timestep

SET gwtime model fluid time-total

SET hbm

zone property constant-mb

SET hbs

zone property constant-s

SET hisfile

history export file

SET implicit

zone fluid implicit or zone thermal implicit

SET jrepath

no equivalent

SET large

model large-strain

SET log

program log and program log-file

SET maxdt

model creep timestep maximum

SET maxgiicmem

no equivalent

SET mech

model mechanical

SET message

no equivalent

SET mindt

model creep timestep minimum

SET multistep

zone dynamic multi-step

SET munb

model solve unbalanced-maximum

SET ncont

can be done with plot command switches

SET ncwrite

no equivalent

SET nfunstep

no equivalent

SET ngw

model fluid substep

SET nmech

model mechanical substep

SET nther

model thermal substep

SET output

plot export bitmap filename. Note that the plot name must be given as a string.

SET overlay

no equivalent

SET overwrite

no equivalent

SET pagelength

no equivalent

SET paginate

program pagination

SET pcx

no direct equivalent. See plot export bitmap

SET plot

see various plot commands

SET pita

see zone property normal

SET pitc

zone property cohesion or zone property joint-cohesion

SET pitf

zone property friction or zone property joint-friction

SET pitt

zone property tension or zone property joint-tension

SET pmom_func

no equivalent

SET psterminator

no equivalent

SET range

can be done with plot command switches

SET replot

no equivalent

SET rez_func

no equivalent

SET seed

model random

SET small

model largestrain off

SET st_damping

zone mechanical damping

SET step

model solve cycles

SET sym

no equivalent

SET symscale

can be done with plot command switches

SET synchronize

no equivalent

SET temperature

no equivalent

SET thdt

model thermal timestep

SET thermal

model thermal

SET tolint

zone interface tolerance-contact

SET ucs

zone property constant-sci

SET umul

model creep timestep upper-multiplier

SET update

zone geometry-update

SET vector

can be done with plot command switches

SET xform

no equivalent

Table 17: Structural Element Operations

FLAC 8.1

FLAC2D 9.0

STRUCTURE beam begin … end … seg

structure beam create

STRUCTURE beam delete

structure beam delete

STRUCTURE beam interface

beams in FLAC2D do not have interfaces

STRUCTURE cable begin … end … seg

structure cable create

STRUCTURE cable delete

structure cable delete

STRUCTURE cable tension

structure cable apply tension

STRUCTURE chprop

use structure cable property etc.

STRUCTURE hinge

no equivalent

STRUCTURE liner begin … end … seg

structure liner create

STRUCTURE liner delete

structure liner delete

STRUCTURE liner interface

structure liner property coupling-yield-normal and similar coupling properties

STRUCTURE node load

structure node apply

STRUCTURE node pin

See structure node join

STRUCTURE node slave

See structure link attach

STRUCTURE node unslave

See structure link attach and structure link delete

STRUCTURE node initial

structure node initialize

STRUCTURE node system

structure node system-local

STRUCTURE pile begin … end … nseg

structure pile create

STRUCTURE pile delete

structure pile delete

STRUCTURE property

structure beam property, structure cable property, structure geogrid property, structure liner property, structure pile property, structure shell property

STRUCTURE rockbolt begin … end … nseg

structure pile create. use structure pile property rockbolt-flag

STRUCTURE rockbolt delete

structure pile delete. use structure pile property rockbolt-flag

STRUCTURE shell begin … end … nseg

structure pile create

STRUCTURE shell delete

structure pile delete

STRUCTURE strip begin … end … seg

structure geogrid create

STRUCTURE strip delete

structure geogrid delete

Table 18: Fluid-Flow Analysis Operations & Utilities

FLAC 8.1

FLAC2D 9.0

WATER auto

no equivalent

WATER biot_c

zone fluid property biot

WATER bound

no equivalent

WATER bulk

zone fluid property biot, zone gridpoint initialize fluid-modulus

WATER density

zone water density

WATER nwdensity

no equivalent, two-phase flow not currently supported

WATER secap

no equivalent, two-phase flow not currently supported

WATER table

zone water plane

CONFIG fluid

model configure fluid-flow

TRACK

zone fluid track create