BUG: Accessing SpectralAnalysisMembersInternalForces for different Envelopes not possible

[MaximilianFranz]

Describe the bug We're trying to access the results of the spectral analysis for different Envelopes (in German: "Umhüllende Y" and "Umhüllende X") via the webservices API. However, we only received the results of the one envelope that's currently selected in the UI and cannot change the envelope programmatically.

To Reproduce We're using this code:

      member_inner_forces = ResultTables.SpectralAnalysisMembersInternalForces(
          loading_type=CaseObjectType.E_OBJECT_TYPE_LOAD_CASE,
          loading_no=loading_id,
          object_no=beam_idx,
          model=model,
      )

where loading_id is the load_case number of "Antwortspektrenverfahren" and beam_idx is the id of a result-beam (type=RESULT_BEAM_TYPE).

We've experimented with using using CaseObjectType.E_OBJECT_TYPE_RESULT_COMBINATION but that didn't yield any results.

Expected behavior Some way to change the envelope type.

Screenshots

This is the envelope we want to switch:

to fetch the results from this table: