python script for "A damping model for nonlinear dynamic analysis providing uniform damping over a frequency range"
Reference: Yuli Huang, Richard Sturt, Michael Willford, A damping model for nonlinear dynamic analysis providing uniform damping over a frequency range, Computers & Structures, Volume 212, 2019, Pages 101-109, ISSN 0045-7949,
https://doi.org/10.1016/j.compstruc.2018.10.016.
(http://www.sciencedirect.com/science/article/pii/S0045794918300555)