IACS UR S11 permissible still-water bending moment (hogging and sagging) as a function of L, B and Cb.
Formula
$$ M_{sw,\text{sag}} = -0.065 \cdot C_1 \cdot L^2 \cdot B \cdot (C_B + 0.7), \quad M_{sw,\text{hog}} = C_1 \cdot L^2 \cdot B \cdot (0.1225 - 0.015 C_B) $$
Symbol legend
| Symbol | Meaning | Unit | Source |
|---|---|---|---|
| $C_1$ | Wave coefficient (L-dependent) | - | IACS UR S11 |
| $L$ | Length between perpendiculars | m | ship particulars |
| $B$ | Beam | m | ship particulars |
| $C_B$ | Block coefficient at SLWL | - | hydrostatic table |
| $M_{sw}$ | Still-water bending moment | kN·m | result |
Sources
- IACS UR S11 (Longitudinal Strength).
- IACS CSR-H (Common Structural Rules).