Wave Bending Moment (IACS UR S11)
IACS UR S11 rule wave-induced bending moments for the North Atlantic reference sea state.
Wave BM (sagging)
-2,086,656,000kN·m
Wave BM (hogging)
1,944,384,000kN·m
Formula, assumptions, and limits
Represents the North-Atlantic 20-year wave envelope. Combine with still-water BM via vector sum: M_total = M_sw + M_wv. Section modulus must be designed to keep combined stress below σ_perm from UR S11.
Symbol legend
| Symbol | Meaning | Unit | Source |
|---|---|---|---|
| Wave coefficient | - | IACS UR S11 | |
| Length | m | ship particulars | |
| Beam | m | ship particulars | |
| Block coefficient | - | hydrostatic | |
| Wave bending moment | kN·m | result |