1. Motion equations

 

For surge, sway, and yaw,

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2. Abkowitz (1966) mathematical modeling

 

Taylor Series Expansion with following assumptions,

   

Then,

 

Simplified derivative notation of SNAME (1952)

and so on, which are so-called 'Hydrodynamic derivatives' or the 'Maneuvering Coefficients'

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

3. Simplified model for a bare hull (no rudders nor propellers case)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

4. PMM Test

1) Special cases of the mathematic model:

Static drift:
Pure sway:
Pure yaw:
Yaw and drift:

 

2) Model trajectories:

	Surge	Sway	Yaw
Static drift		0
Pure sway
Pure yaw
Yaw and drift

 

 

3) Motions:

	Surge	Sway	Yaw
Static drift	0		0
Pure sway	0		0
Pure yaw	0	0
Yaw and drift	0

 

 

4) Mathematic models