Bow Flare Slam - Sea-Swell Check
Bow-flare slam frequency for a ship with significant flare angle - occurs in head seas when bow flare hits the approaching wave.
Impact pressure
0kN/m²
Formula, assumptions, and limits
$$p_{flare} \approx \tfrac{1}{2} \rho V^2 \tan^2\alpha_f$$
Large flare → high wave-impact pressure on topsides. Containerships with knuckle above 01 deck in heavy weather suffer cracked plating. Reduce by speed reduction or altering heading.
Symbol legend
| Symbol | Meaning | Unit | Source |
|---|---|---|---|
| $\alpha_f$ | Flare angle from vertical | deg | GA drawing |
| $V$ | Relative horizontal velocity | m/s | seakeeping analysis |
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