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Collision Energy Absorption (DNV)

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Bow-to-side collision kinetic energy at impact: E = ½ · M_eff · V² between two ships of different size.

Formula

$$ E = \tfrac{1}{2} M_\text{eff} V_\text{rel}^2, \quad M_\text{eff} = \frac{M_1^* \cdot M_2^*}{M_1^* + M_2^*} $$

Symbol legend

SymbolMeaningUnitSource
$M_1^*, M_2^*$Effective (added) massestdisplacement + added mass
$V_\text{rel}$Relative speed at impactm/soperating condition

Sources

  • DNV-RP-C204 - Structural design against accidental loads.

See also