Add comparison against other software

[raphaeltimbo]

We should add some comparison against other software in our documentation.
Based on discussion #911.

[raphaeltimbo]

We are going to run some cases against ROMAC and XLTRC.

[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.

[jguarato]

We are going to run some cases against ROMAC and XLTRC.

@raphaeltimbo, which analyses do you think is important to run? So far I have only run the transient analysis.
Where could I add the benchmarking results?

[raphaeltimbo]

Hi @jguarato !
We could start with a modal and an unbalance response.