The Structural Engineer > Archive > Volume 57 (1979) > Issues > Issue 16 > The Dynamic Behaviour of Offshore Platform Cranes
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The Dynamic Behaviour of Offshore Platform Cranes

A simplified dynamic model of a marine crane is used to calculate the magnitude of dynamic loads arising from lifting cargoes from the deck of a moving supply boat. Typical results show that the maximum dynamic loads acting on the crane system are, in general, much greater than is commonly believed. For North Sea applications, it is suggested that dynamic factors of at least 5 should be used in design. Although motion compensators can be used to minimise system loads, it is maintained that a marine crane should be safe in terms of allowable stresses and fatigue life in the absence of such aids. D.G. Owen