Hello,
You can find the full list of Code_Aster test cases here:
https://codeaster.gitlab.io/doc/docaster/manuals/man_v/other_pages/list/index.html
This page documents many different types of problems that can be handled with Code_Aster.
The corresponding .comm and .export files for these test cases are available in the official Code_Aster GitLab repository:
https://gitlab.com/codeaster/src/-/tree/main/astest?ref_type=heads
To find a specific test case, search for its reference name in GitLab. For example, for the test case:
v5.01.121: SDND121 – Système masse-ressort avec chocs sous excitation forcée
you can simply search for SDND121.