Fender Reaction at Deflection
Peak reaction force from a fender's reaction-deflection curve for a given energy absorption.
Utilisation of rated energy
0.800 -
Peak fender reaction
1,073kN
Status
Within rating
Formula, assumptions, and limits
$$R \approx R_\text{rated} \cdot \sqrt{E / E_\text{rated}}$$
Reaction scales roughly as √(energy) for modern rubber / pneumatic fenders (near-linear force-deflection until buckling). Includes a configurable abnormal-impact factor (PIANC $C_{\text{AB}}$ 1.25–2.0 depending on berth class).
Symbol legend
| Symbol | Meaning | Unit | Source |
|---|---|---|---|
| $E$ | Berthing energy to absorb | kJ | previous calc |
| $E_\text{rated}$ | Fender rated energy at design deflection | kJ | fender data sheet |
| $R_\text{rated}$ | Fender rated reaction | kN | fender data sheet |
Spotted an error in this calculation? . We acknowledge editorial corrections within two working days.