lanboption

Mapdl.lanboption(strmck='', **kwargs)

Specifies Block Lanczos eigensolver options.

APDL Command: LANBOPTION

strmck

Controls whether the Block Lanczos eigensolver will perform a Sturm sequence check:

  • "OFF" : Do not perform the Sturm sequence check (default).

  • "ON" : Perform a Sturm sequence check. This requires additional matrix factorization (which can be expensive), but does help ensure that no modes are missed in the specified range.

Notes

LANBOPTION specifies options to be used with the Block Lanczos eigensolver during an eigenvalue buckling analysis (BUCOPT,LANB) or a modal analysis (MODOPT,LANB).

By default the sturm sequence check is off for the Block Lanczos eigensolver when it is used in a modal analysis, and on when it is used in a buckling analysis.