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Bow Slamming - Probability Estimate

Probability of bow slamming per wave encounter (Ochi 1964) based on bow forefoot emergence and relative vertical velocity.

SlammingSeakeepingOchi
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Formula, assumptions, and limits

Pslam=exp(TF22σz2vcrit22σz˙2)P_{slam} = \exp\left(-\frac{T_F^2}{2\sigma_z^2} - \frac{v_{crit}^2}{2\sigma_{\dot z}^2}\right)
SymbolMeaningUnit
TFT_FBow forefoot draftm
σz\sigma_zσ of relative heavem
vcritv_{crit}Critical slam velocitym/s

Source: Ochi M.K. - NAME 1964

In short

Probability of bow slamming per wave encounter (Ochi 1964) based on bow forefoot emergence and relative vertical velocity.

Learn the theory Seakeeping: Ship Performance in Waves