Floating Wind Turbine Pitch Calculator

Floating Offshore Wind: Calculate semisubmersible hydrostatic pitch stiffness ($C_{55}$), added mass inertia, and natural pitch period ($T_{pitch}$).

Total Displacement $ abla$ ($ ext{m}^3$):

Draft $T_{draft}$ (m):

Column Spacing / Radius $R_c$ (m):

Outer Column Dia $D_c$ (m):

Vertical Center of Gravity $z_G$ (m):

Vertical Center of Buoyancy $z_B$ (m):

Pitch Natural Period

-- s

Metacentric Height ($GM_L$)

-- m

Pitch Stiffness ($C_{55}$)

-- GN·m/rad

Wave Avoidance

• Waterplane Area Second Moment ($I_{wp}$): -- m⁴

• Metacentric Radius ($BM_L = I_{wp} / abla$): -- m

• Total Pitch Inertia ($I_{55} + A_{55}$): -- Gkg·m²

• Target Design Criterion: T_pitch > 25 s (avoids 100-yr ocean wave peak periods)

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