lsread

Mapdl.lsread(lsnum='', **kwargs)

Reads load and load step option data into the database.

Warning

This command can only run in non-interactive mode. Please visit Unsupported “Interactive” Commands for further information.

APDL Command: LSREAD

Parameters:

lsnum

Identification number of the load step file to be read. Defaults to 1 + highest number read in the current session. Issue LSREAD,STAT to list the current value of LSNUM. Issue LSREAD,INIT to reset LSNUM to 1. The load step files are assumed to be named Jobname.Sn, where n is a number assigned by the LSWRITE command (01 –09,10,11, etc.). On systems with a 3-character limit on the extension, the “S” is dropped for LSNUM > 99.

Notes

Reads load and load step option data from the load step file into the database. LSREAD will not clear the database of all current loads. However, if a load is respecified with LSREAD, then it will overwrite the existing load. See the LSWRITE command to write load step files, and the LSDELE command to delete load step files. LSREAD removes any existing SFGRAD specification.

This command is also valid in PREP7.

Examples

Demonstrate writing out load steps using lswrite <ansys.mapdl.core.Mapdl.lswrite> and reading them back in using ``lsread`().

>>> from ansys.mapdl.core import launch_mapdl
>>> mapdl = launch_mapdl()
>>> mapdl.clear()
>>> mapdl.prep7()

Build a 5 x 5 flat plate out of shell181 elements.

>>> mapdl.rectng(0, 5, 0, 5)
>>> mapdl.et(1, 'SHELL181')
>>> mapdl.mp('ex', 1, 10.0e5)
>>> mapdl.sectype(1, 'shell')
>>> mapdl.secdata(0.1)  #  0.1 thick
>>> mapdl.esize(1)
>>> mapdl.amesh('all')

Fix the four corners

>>> mapdl.d('node(0,0,0)', 'all')
>>> mapdl.d('node(0,5,0)', 'all')
>>> mapdl.d('node(5,5,0)', 'all')
>>> mapdl.d('node(5,0,0)', 'all')

Enter the solution routine and define a force at (2,2,0).

>>> mapdl.slashsolu()
>>> mapdl.antype('static')
>>> mapdl.f('node(2,2,0)', 'fz', -10)

Write load out as load step 1 and delete all loads and displacements.

>>> mapdl.lswrite(1)
>>> mapdl.fdele('all', 'all')
>>> mapdl.ddele('all', 'all')

Read back in the loads and list them.

>>> mapdl.lsread(1)
>>> mapdl.flist()
LIST NODAL FORCES FOR SELECTED NODES         1 TO       36 BY        1
CURRENTLY SELECTED NODAL LOAD SET= FX   FY   FZ   MX   MY   MZ

* MAPDL - ENGINEERING ANALYSIS SYSTEM RELEASE 2022 R2 22.2 * Ansys Mechanical Enterprise 00000000 VERSION=LINUX x64 10:15:14 AUG 22, 2022 CP= 0.561

NODE LABEL REAL IMAG

26 FZ -10.0000000 0.00000000