Marine spray from wave run-up to a hull as input to icing models

Ships at sea will encounter deck wetness events that usually are just annoying and rarely lead to damage. Discomfort is experienced by spray, as it is limiting view and hampering deck work. In freezing conditions, deck wetting will lead to icing. This study is a continuation of publications regarding the development of a marine icing model...

Wave reflection at the interface between a nonlinear discrete lattice and a matching linear system

This contribution considers the wave reflection at the interface between a discrete lattice that describes the nonlinear near-field response to a dynamic load and a matching system that describes the linear far-field response. The near-field system is modelled as a one-dimensional discrete system of particles that is capable of describing...

Modelling the Dynamics of Iceberg-Soil Interaction during Seabed Gouging

Not only in the Arctic, but also well outside the Arctic, icebergs can be a danger to buried offshore pipelines due to seabed gouging. As it is not economically feasible to bury these pipelines at depths where soil deformations are small, these pipelines are buried at sub-gouge depths where the soil experiences significant plastic deformations....

Modelling the ballistics and thermodynamics of bow spray droplets for marine icing

In preparation to the SALTO JIP (Safe Arctic Logistics, Transport & Operations) work was done towards developing an improved model for icing due to sea spray at the bow of a ship. The so-called SHIPICE model may be used in a probabilistic risk-based approach and consists of two main segments: 1. Probabilistic modeling of spray water volumes...

A mixed time-frequency domain method to describe the dynamic behaviour of a discrete medium bounded by a linear continuum

To minimize the calculation time required by numerical models that de- scribe dynamic interactions involving nonlinear behaviour, it is useful to divide the model into two separate domains. One domain close to the interaction point, which consists of a sophisticated model capable of describing nonlinear phenomena, and another domain at a...

Experimental program for ice loads on an artic jack-up structure

Experiment-based relations between level ice loads and managed ice loads on an Artic jack-up structure

Jack-ups have been constructed for numerous ocean environments, but to date there has been no operating experience under Arctic sea ice conditions. The current state of jack-up technology does not allow working outside the ice-free season and thus ice management will be needed to extend the drilling season. Currently, ice load calculations are...

Estimation of the vibration decrement of an offshore wind turbine support structure caused by its interaction with soil