Dynamic Amplification Factor (DAF) or Dynamic Increase Factor (DIF), is a dimensionless number which describes how many times the deflections or stresses should be multiplied to the deflections or stresses caused by the static loads when a dynamic load is applied on to a structure.Dynamics of structures by Anil K Chopra
When lifting an object during a sub-sea operation, the DAF is calculated based on dynamic hydraulic forces or on snap-forces. Modelling and analysis of marine operation , DNV-RP-H103, April 2011
Where: is the mass of the object in air (kg) is the acceleration of gravity (9.81m/s2) is the largest of or (N)
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