Modal Integration

[marcusfilipesr]

This PR is devoted to implementing a new integration inside ROSS, using the modal reduction. The main goal is to enable the solution of #429, #530 and #884.

This PR itself, does not solve any of the cited issues yet, i.e., it is a pre solution.

• Insert the modal analysis to perform the time integration.
• Rearrange the integrate_solver file.
• Verify robustness of the automatic number of modes. ( Forced inputs? )
• Run benchmark code with different number of modes evaluating the error

[marcusfilipesr]

I've just implementend the integration method. It's lacking the tests, which I'll be implementing tomorrow.

[codecov-commenter]

Codecov Report

Merging #976 (fe5c9c0) into main (ee6e3f0) will decrease coverage by 0.46%.
The diff coverage is 58.59%.

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@@            Coverage Diff             @@
##             main     #976      +/-   ##
==========================================
- Coverage   85.56%   85.11%   -0.46%     
==========================================
  Files          34       34              
  Lines        7530     7650     +120     
==========================================
+ Hits         6443     6511      +68     
- Misses       1087     1139      +52     

Files Changed	Coverage Δ
ross/defects/integrate_solver.py	56.32% <14.28%> (-39.52%)	⬇️
ross/rotor_assembly.py	92.40% <80.23%> (-0.85%)	⬇️

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[marcusfilipesr]

@raphaeltimbo I think I've finished the first step which was:

• Insert the modal analysis to perform the time integration.

I think it would be better to go slowly, so I will keep this branch without changes until your review. What do you think?

[raphaeltimbo]

Made some small comments for now.
I think we should, in parallel, solve the issue #978, so that we can benchmark this new integrator.

[ross-bott]

Hi there!
I have marked this issue as stale because it has not had activity for 45 days.
Consider the following options:

• If the issue refers to a large task, break it in smaller issues that can be solved in
  less than 45 days;
• Label the issue as wontfix or wontfix for now and close it.

[raphaeltimbo]

We have implemented the newmark integration.