分类： LINUX
2013-12-21 14:49:55
The
following parameters provide default values for various settings that
would otherwise have to be specified on the command line (see “Execution procedure for Abaqus/Standard and Abaqus/Explicit,” Section 3.2.2). Values given on the command line override values specified in the environment files.
cpus
Number of processors to use if parallel processing is available. The default is 1.
domains
The
number of parallel domains in Abaqus/Explicit. If the value is greater
than 1, the domain decomposition will be performed regardless of the
values of the parallel and cpus parameters. However, if parallel=domain, the value of cpus must be evenly divisible into the value of domains. If this parameter is not set, the number of domains defaults to the number of processors used during the analysis run if parallel=domain or to 1 if parallel=loop.
double_precision
The default precision version of Abaqus/Explicit to run if you do not specify the precision version on the abaqus command line. Possible values are EXPLICIT (only the Abaqus/Explicit analysis is run in double precision) or BOTH (both the Abaqus/Explicit packager and analysis are run in double precision). The default is EXPLICIT.
parallel
The default parallel method in Abaqus/Explicit if you do not specify the parallel method on the abaqus command line. Possible values are DOMAIN or LOOP; the default value is DOMAIN.
run_mode
Default run mode (interactive, background, or batch) if you do not specify the run mode on the abaqus command line. The default for abaqus analysis is "background", while the default for abaqus viewer is "interactive".
scratch
Directory
to be used for scratch files. This directory must exist (i.e., it will
not be created by Abaqus) and must have write permission assigned. On
UNIX platforms the default value is the value of the $TMPDIR environment variable or /tmp if $TMPDIR is not defined. On Windows platforms the default value is the value of the %TEMP% environment variable or \TEMP if this variable is not defined. During the analysis a subdirectory
will be created under this directory to hold the analysis scratch files.
The name of the subdirectory is constructed from your user name, the
job id, and the job's process identifier. The subdirectory and its
contents are deleted upon completion of the analysis.
standard_parallel
The default parallel execution mode in Abaqus/Standard if you do not specify the parallel mode on the abaqus command line. If this parameter is set equal to ALL, both the element operations and the solver will run in parallel. If this parameter is set equal to SOLVER, only the solver will run in parallel. The default parallel execution mode is ALL.
unconnected_regions
If this variable is set to ON, Abaqus/Standard will create element and node sets in the output database for unconnected regions in the model during a datacheck analysis. Element and node sets created with this option are named MESH COMPONENT N, where N is the component number. The default value is OFF.
The
following environment file variable can be set after the code has been
installed to change the resources used by Abaqus and, therefore, to
improve system performance. By default, Abaqus detects the physical
memory on a machine (or on each compute node in a cluster) and allocates
a percentage of the available memory based on the machine platform (for
details, refer to the SIMULIA Online Support System, which is
accessible from the My Support page at ).
You can override the default percentage by specifying a number followed
by the percentage sign. The variable can also be defined as the number
of megabytes or the number of gigabytes. More detailed information about
changing the system resources used by Abaqus is given in .
memory
Maximum
amount of memory or maximum percentage of the physical memory that can
be allocated during the input file preprocessing and during the
Abaqus/Standard analysis phase. For parallel execution on computer
clusters, this memory limit specifies the maximum amount of memory that
can be allocated on each process.
The
following is a discussion of some additional environment file
parameters that are commonly used. A complete listing of parameters can
be found in the .
ask_delete
If this parameter is set equal to OFF,
you will not be asked whether old job files of the same file name
should be deleted; the files will be deleted automatically. The default
value is ON.
auto_calculate
If this parameter is set equal to ON,
the postprocessing calculator will be launched automatically at the end
of an analysis if the execution procedure detects that output database
file conversion is necessary. If this parameter is set to OFF,
the postprocessing calculator will not run at the end of an analysis
even if the execution procedure detects that it is necessary. The
default value is ON.
auto_convert
If this parameter is set equal to ON and an Abaqus/Explicit analysis is run in parallel with parallel=domain, the convert=select, convert=state, and convert=odb options will be run automatically at the end of the analysis. The default value is ON.
average_by_section
This parameter is used only for an Abaqus/Standard analysis. If this parameter is set equal to OFF, the averaging regions for output written to the data (.dat) file and results (.fil) file are based on the structure of the elements. If this parameter is set equal to ON,
the averaging regions also take into account underlying values of
element properties and material constants. In problems with many section
and/or material definitions the default value of OFF will, in general, give much better performance than the nondefault value of ON. See , for further details on the averaging scheme.
mp_host_list
List
of host machine names to be used for an MPI-based parallel Abaqus
analysis, including the number of processors to be used on each machine;
for example,
mp_mode
Set this variable equal to MPI to indicate that the MPI components are available on the system. Set mp_mode=THREADS to use the thread-based parallelization method. The default value is MPI where applicable.
odb_output_by_default
If this parameter is set equal to ON, output database output will be generated automatically. If this parameter is set equal to OFF, output database request keywords must be placed in an input file to obtain output database output. The default value is ON.
onCaeStartup
Optional function to be executed before Abaqus/CAE begins. See “Customizing Abaqus/CAE startup,” Section 4.3.3 of the Abaqus Installation and Licensing Guide, for examples of this function.
Command summary
[ | | | | ={select | odb | state | all} | | | ={environment | local | memory | release | support | system | all}]
mp_host_list=[['maple',1],['pine',1],['oak',2]]
indicates that, if the number of cpus specified for the analysis is 4, the analysis will use one processor on a machine called maple, one processor on a machine called pine, and two processors on a machine called oak. The total number of processors defined in the host list has to be greater than or equal to the number of cpus specified for the analysis. If the host list is not defined, Abaqus
will run on the local system. When using a supported queuing system,
this parameter does not need to be defined. If it is defined, it will
get overridden by the queuing environment.
The following environment file variables provide default settings for co-simulation between two Abaqus analyses or between Abaqus and AcuSolve.
cosimulation_port
Set cosimulation_port equal to the port number used for the connection. The default value is 48000.
cosimulation_timeout
Set cosimulation_timeout equal to the timeout period in seconds. Abaqus terminates if it does not receive any communication from the coupled analysis program during the time specified. The default value is 3600 seconds.
mp_host_list=[['maple',1],['pine',1],['oak',2]]
