analysis.yml

interface: femap
diags:
  - 18  # print the set2 grid points
params:
  VREF: 1000.0  # velocity unity transform  -> V := V/Vref (from mm/s to m/s in the case)
#  WTMASS: 1.  # 1/g -> if entries are in "weight density"
#  GRDPNT: 1 # IDK
  COUPMASS: 1  # Coupled Mass Matrix --> more precision
#  OPPHIPA: 1 # IDK
  POST: -1  # output op2 file
  UNITSYS: 'N-MM-C'  # misc units information
  LMODES: 15 # limit the number of modes used on flutter subcase
subcases:
  1:
    type: 'PANELFLUTTER' # chose between PANELFLUTTER for panel flutter configurations and DEFAULT for usual flutter analysis
    case_control: # case control
       - 'ECHO=BOTH'
       - 'DISP=ALL'
       - 'SPC=1'
    plate_stiffness: 37113.4  # used to calculate the non-dimensional dynamic pressure (N mm in the case)
    vref: 1000. # used to calculate the non-dimensional dynamic pressure must be the same in control case (mm/s in the case)
    ref_rho: 1.225E-12  # air density reference (ton/mm^3 in the case)
    ref_chord: 300. # reference chord (mm in the case)
    n_modes: 15 # number searched modes in modal analysis
    frequency_limits: # the range of frequency (Hz) in modal analysis
      - 0.0
      - 1000.0
    method: 'PK' # the method for solving flutter (it will determine the next parameters
    densities_ratio: # rho/rho_ref -> 1/2 simulates the "one side flow" of the panel
      - .5
    machs: # Mach numbers
      - 2.0
#      - 3.0
#      - 4.0
#      - 5.0
    alphas: # AoA (°) -> 0 is more conservative
      - 0.0
#      - 0.0
#      - 0.0
#      - 0.0
    reduced_frequencies: # reduced frequencies (k)
      - .001
      - .1
      - .2
      - .4
    velocities: # velocities (mm/s in the case)
      - 330000.
      - 357250.
      - 384500.
      - 411750.
      - 439000.
      - 466250.
      - 493500.
      - 520750.
      - 548000.
      - 575250.
      - 602500.
      - 629751.
      - 657001.
      - 684251.
      - 711501.
      - 738751.
      - 766001.
      - 793251.
      - -820501.
      - 847751.
      - 875001.
      - 902251.
      - 950000.
      - 1000000.