scale_mass_normalised_modes

Scales eigenvector matrix such that the modes are mass normalised:

\[\phi^\top\boldsymbol{M}\phi = \boldsymbol{I}\]

and

\[\phi^\top\boldsymbol{K}\phi = \mathrm{diag}(\omega^2)\]

param eigenvectors:

Eigenvector matrix.

type eigenvectors:

np.array

param mass_matrix:

Mass matrix.

type mass_matrix:

np.array

returns:

Mass-normalised eigenvectors.

rtype:

np.array