Hello everyone!!!

I am trying model an Acoustic Black Hole (ABH) beam on Abaqus using 1D beam elements. How can I define the varying cross section along the retarding part of the beam?

While defining beam section properties there are only options to make the beam shape along length: constant or tapered. However, the retarding end of an ABH beam follows a power law function (x^2) 

Abaqus ​​​​​​​