How to derive the moment of a floating body about a rotation axis on itself?

edited August 26 in DualSPHysics v5.0


I'm trying to simulate the motion of a floating body in waves. At present, I have only found the calculation method about the fixed  rotation axis, but I want to derive the moment of the floating body about its own rotation axis. How can it be achieved?

  -momentaxis:x1:y1:z1:x2:y2:z2 Axis for moment calculation

Best regards!


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