ModalAnalysis

Solve for the unforced modal response using frequencies and mode shape vectors.

Fields

num_eigenvalues: Integer, default = 0

Number of eigenvalues (frequencies) to solve for.
max_frequency: Float, default = 0.0

Maximum eigenvalue to solve for.
min_frequency: Float, default = 0.0

Minimum eigenvalue to solve for.
unconstrained_dofs: Vector of Integer, default = []

If there are Dirichlet BCs but they do not constrain all the rigid body modes, the remaining modes have to be given here:

0 = displacements in the $x$ direction

1 = displacements in the $y$ direction

2 = displacements in the $z$ direction

3 = rotations in the $x$-$y$ plane

4 = rotations in the $y$-$z$ plane

5 = rotations in the $z$-$x$ plane

Note that if no Dirichlet BCs are given, Reflex automatically chooses all six modes as unconstrained.