ansys.mapdl.core.Mapdl.modcont#

Mapdl.modcont(mlskey='', enforcedkey='', fastlv='', **kwargs)#

Specify additional modal analysis options.

Mechanical APDL Command: MODCONT

Parameters:
mlskeystr

Multiple load step key:

  • OFF - Perform the modal analysis (compute the eigenvalues and the load vector) for each load step. (default)

  • ON - Perform the modal analysis (compute the eigenvalues and the load vector) only for the first load step; form the load vector for each subsequent load step (without repeating the eigenvalue calculations) and write all load vectors to the Jobname.MODE file for downstream mode- superposition analyses.

enforcedkeystr

Enforced motion key:

  • OFF - Do not calculate enforced static modes. (default)

  • ON - Calculate enforced static modes and write them to the Jobname.MODE file.

fastlvstr

Fast load vector generation key; valid only when MLSkey = ON:

  • OFF - Do not activate fast load vector generation (default).

  • ON - Activate fast load vector generation. This option is only supported when each load vector is based on a unique element surface load ( sfe ) applied on one element, and the element result superposition key is activated ( MSUPkey = YES on mxpand ).

Notes

Specifies additional modal analysis ( antype,MODAL) options.

Use the lvscale command to apply the desired load in a mode-superposition transient or harmonic analysis.

When MSUPkey = YES on the mxpand command, the maximum number of load vectors allowed in the Jobname.MODE file defaults to 1000. To increase this limit, use the command config,NUMLV. When FastLV = ON, the limit is automatically set to 1x10 6 and cannot be changed.

The maximum number of load vectors that can be used in the downstream mode-superposition transient or harmonic analysis is the number of load vectors written in the Jobname.MODE file.

Generation of multiple loads ( MLSkey = ON) is supported by the Block Lanczos, PCG Lanczos, Supernode, Subspace, Unsymmetric, and QRDAMP mode extraction methods.

The enforced motion calculation ( EnforcedKey = ON) is supported by the Block Lanczos, Supernode, Subspace, and QRDAMP mode extraction methods.