Thank you so much for your response. I solved this problem. However, I have another problem with the yaw motion response in the time domain. I simulated only the case of wave direction of 180 degrees. However, the ship rotated continuously 1 unreasonable when the wave direction was 180 degrees as shown in the picture below. Theoretically, when the ship operates 180 degrees, yaw motion is almost non-existent. Is there has any way to reduce the yaw motion such as adding the torsional stiffness or something?
You are navigating away from the AIS Discovery experience