! ----------------------------------------------------------------------
! M12 - English course download: 12_challenge.mac
! Follow the matching English lesson for explanations and task details.
! Commands, parameter names, file names, CSV keys, and result tokens are preserved.
! ----------------------------------------------------------------------

/CLEAR,START                        ! Vary the BEAM188 connector diameter or effective length.
/FILNAME,m12_challenge,1
/UNITS,SI

! Base case (deliverable): bolt_d=0.012 m, plate_t=0.012 m,
! fx_total=4000 N, fy_total=-3000 N.
!
! Challenge A (stiffness): bolt_d=0.016 m -> predict smaller |uy_head| on BEAM188 (SECDATA,1,bolt_d).
! Challenge B (length): plate_t=0.016 m -> predict greater axial connector compliance.
!
! TODO 1: copy 12_bolt_connector.mac to a clean directory.
! TODO 2: choose Challenge A or B; write a prediction for uy_head_beam or connector fy.
! TODO 3: run from a clean session and record an extra row in a note or CSV.
! TODO 4: confirm equilibrium <0.5 % and MPC vs BEAM consistency in fx/fy (<8 %).
! TODO 5: repeat in a second clean directory and verify reproducibility.
!
! Base references:
! n_head_dep>=4, n_thread_dep>=4, study_passes=1
! m12_bolt_forces.csv exports forces for external code checking.

FINISH