Modal Analysis

mangeshmangesh
Which algorithm does Mecway uses for 3D Modal Analysis, like Lanczos we uses in Ansys

Comments

  • VictorVictor
    The internal solver uses either of two eigenvalue solvers depending on the size of the model:

    500 DOFs or more: ARPACK's Implicitly Restarted Arnoldi Method which is similar to Lanczos since the matrices are symmetric (except for cyclic symmetry where there are Hermitian).

    Less than 500 DOFs: LAPACK's dspgvx. I don't know what algorithm that uses but it's more efficient for small problems or large numbers of modes.

    I believe the CCX solver uses ARPACK.
  • mangeshmangesh
    Thank you for the information
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