Maritime trade and the closed off space: How can architecture shape the invisible world of the consumers industry into a future space where human coexist with this automated machine?: A scenography of a machine

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Onsite Blade Exchange on a Tension-Leg Platform Floating Wind Turbine using a Self-Climbing Crane

Floating offshore wind turbines offer a means to access wind resources in waters that are too deep for bottom-fixed offshore wind turbines. To operate a floating wind farm, it must be possible to perform maintenance on the turbines. A critical maintenance aspect is the exchange of a major component such as a blade. It involves a lift of a large...

Wave Induced Dynamics of Offshore Heavy Lift Cranes on Jack-Ups: Analysis of the annual probability of failure of the crane in normal operation

Due to the increasing size of offshore wind turbines, the jack-up vessels and cranes installing them need to increase in size. The increase in length of the crane boom results in an increase of the dynamic response of the crane. This increase in response results in higher loads in the crane. The magnitude of the higher loads are unknown and not...

Earthquakes and offshore wind turbine installation;: A review and analysis of mitigation measures for cranes on jackups

Due to a high demand for offshore wind energy the industry is expanding to evermore challenging locations such as seismic prone areas. The corresponding seismic shocks and vibrations can be transmitted to jack‐up vessels and their cranes used for the installation of these offshore wind turbines. Since a potential collapse due to seismic activity...

Buckling stability of the Tetrahedron Crane

This thesis aims to provide insight into the conceptual design phase of Tetrahedron B.V. with regards to buckling stability. Currently, Tetrahedron B.V. assumes an effective length factor of one for determining the cross-section profiles of the Tetrahedron Crane. In this thesis, Euler-Bernoulli beams are used to model every member of this crane,...

Development of sway reduction control for the Jacket Lift System of Pioneering Spirit

Pioneering Spirit, Allseas's largest pipelay vessel, will be outfitted with a novel Jacket Lift System (JLS). A jacket refers to the steel frame which supports the topside of a fixed offshore platform. The Pioneering Spirit was already capable of lifting the topsides of offshore platforms, like the former oil platform Brent Delta, but would have...

Developing a method to assess the workability of an offshore heavy lifting operation

This master thesis describes a method to determine the workability of an offshore heavy lift operation. By creating wave realisations based on and statistically equivalent to measured ocean weather data, a quick assessment of the risk of failure can be achieved.

Combinatorial optimisation methods for wind farm installation scheduling: Optimisation in crane actions and installation ship routing

The offshore wind industry is rapidly growing, and so is the competition in this market. Normally, offshore installation companies receive a subsidy for building offshore wind farms, but due to multiple companies bidding to install for lower and lower subsidies, the point where wind farms are installed without subsidy has been reached. Therefore...

Inventory Optimization for Mercurius Shipping Group's Container-Crane Vessels

Mercurius Shipping Group invested in two container-crane vessels which are able to load and unload cargo to and from its holds. Due to their unique feature, the crane, failure of the vessels results in large financial consequences. Previous experience showed that these costs could be mitigated with easily/timely available spare-parts. The main...

Control system for 3D crane tip compensation

Offshore wind farms are a sustainable source of energy, but these farms require maintenance which is very expensive using the current techniques. Huisman Equipment B.V. proposed a new type of offshore motion compensated crane that is capable of reaching the height of the nacelle of these wind turbines. The crane has a compensation system on the...

Optimizing Workability of a Motion Compensated Crane by Studying Residual Motion Behaviour