  A systematic expression quantifying the wave energy skewing phenomenon as a
function of the mechanical characteristics of a non-isotropic structure is
derived in this study. A structure of arbitrary anisotropy, layering and
geometric complexity is modelled through Finite Elements (FEs) coupled to a
periodic structure wave scheme. A generic approach for efficiently computing
the angular sensitivity of the wave slowness for each wave type, direction and
frequency is presented. The approach does not involve any finite
differentiation scheme and is therefore computationally efficient and not prone
to the associated numerical errors.
