Fender Reaction at Deflection

Peak reaction force from a fender's reaction-deflection curve for a given energy absorption.

MooringFender

Berthing energy to absorbkJFender rated energykJFender rated reactionkNFactor of safety / abnormal impact -

Utilisation of rated energy: 0.800 -

Peak fender reaction: 1,073kN

Status: Within rating

Changing the inputs requires JavaScript. The calculator above shows its default inputs and result. The formula, symbols, and regulatory sources are shown in the Formula section below.

Formula, assumptions, and limits

R \approx R_\text{rated} \cdot \sqrt{E / E_\text{rated}}

Symbol	Meaning	Unit
$E$	Berthing energy to absorb	kJ
$E_\text{rated}$	Fender rated energy at design deflection	kJ
$R_\text{rated}$	Fender rated reaction	kN

Source: PIANC WG33 Annex A; Trelleborg Fender Design Manual

In short

Peak reaction force from a fender's reaction-deflection curve for a given energy absorption.

Learn the theory Berthing Operations and Fender Selection