ansys.mapdl.core.Mapdl.qrdopt#

Mapdl.qrdopt(reusekey='', symmeth='', cmccoutkey='', **kwargs)#

Specifies additional QRDAMP modal analysis options.

Mechanical APDL Command: QRDOPT

Parameters:
reusekeystr

Reuse key for method= QRDAMP specified in modopt command.

  • ON - Reuse the symmetric eigensolution from the previous load steps or from the previous solution.

  • OFF - Do not reuse (calculates symmetric eigensolution at current load step). This is the default.

symmethstr

Mode-extraction method to be used for the symmetric eigenvalue problem.

  • LANB - Block Lanczos algorithm (default).

  • SUBSP - Subspace algorithm.

  • SNODE - Supernode algorithm.

cmccoutkeystr

Complex Modal Contribution Coefficients (CMCC) output key. See Calculate the Complex Mode Contribution Coefficients (CMCC)

  • ON - Output the CMCC to the text file JobnameCMCC.

  • OFF - Do not output the CMCC. This is the default.

Notes

If the filename.modesym file exists in the working directory and ReuseKey = ON, filename.modesym will be reused. If filename.modesym does not exist in the working directory, the symmetric eigensolution will be calculated.

When ReuseKey =ON, both the new modal analysis ( filename.modesym usage) and the preceding modal analysis ( filename.modesym generation) must be performed using the same product version number.