I am glad that you are interested in working on Beam Solving System. You can look into this
Singularity Function and
Beam classes to start with. I think when I was working on this project I have missed the implementation that solves cantilever beam problems. You can start by adding that feature. You can also read my
blog to understand the work that I have done for this project.
I am adding Jason Moore in this thread who was my mentor. He is very friendly and kind person. He can help you with the further ideas needed for this project.