5.8. eigen command¶
- eigen(solver='-genBandArpack', numEigenvalues)¶
Eigen value analysis. Return a list of eigen values.
number of eigenvalues required
optional string detailing type of solver:
The eigenvectors are stored at the nodes and can be printed out using a Node Recorder, the nodeEigenvector command, or the Print command.
The default eigensolver is able to solve only for N-1 eigenvalues, where N is the number of inertial DOFs. When running into this limitation the -fullGenLapack solver can be used instead of the default Arpack solver.
The -fullGenLapack option is VERY SLOW for moderate to large models