time domain mooring analysis of a ship

- May 25, 2024 at 9:33 am
  
  d1227078662
  Subscriber
  
  When I do a time domain mooring analysis of a ship, I get the errors shown below, what can I do to fix these problems, thank you for your answer.
- May 28, 2024 at 12:00 pm
  
  Shuangxing Du
  Ansys Employee
  
  Please check your Hydrodynamic Diffraction model
  (1) For each water-piercing structure, "Generate Internal Lid" is set as Yes.
  (2) If there are multiple structures in the hydrodynamic interaction group, the external lid is introduced to suppress the standing waves between the gaps of the strutures.
  (3) Define more wave frequencies.
  In the time domain analysis, define some roll/pitch nonlinear dampings if they exist.