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Crane Dynamic Factor - DNV-ST-0378

Hoisting dynamic factor ψ for offshore and shipboard cranes per DNV-ST-0378 / API 2C - the multiplier on static load for design.

CraneDNV-ST-0378Dynamic
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Formula, assumptions, and limits

ψ=ψ0+0.3vhoist+0.15Hs\psi = \psi_0 + 0.3\,v_{hoist} + 0.15\,H_s
SymbolMeaningUnit
ψ0\psi_0Base dynamic factor
vhoistv_{hoist}Hoisting speedm/s
HsH_sSea state at liftm

Source: DNV-ST-0378; API Spec 2C

In short

Hoisting dynamic factor \u03c8 for offshore and shipboard cranes per DNV-ST-0378 / API 2C - the multiplier on static load for design.

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