3D motion compensation for an offshore crane: Assessing the feasibility for wind turbine maintenance

When working offshore on a floating vessel, the vessel will be subjected to wave induced motions and with a moving crane tip, a suspended load can start to swing. When the motions of the load become too large, the operation is interrupted. Alternatives such as jack-ups, function as a fixed platform to which the crane is attached, therefore...

Improving the combined operation of Dynamic Positioning and motion compensation from a control engineering perspective

The starting point of this research is to asses possible shortcomings of the combined operation of a Dynamic Positioning (DP) vessel and a motion compensation system, with respect to the amount of energy that is used. The motion compensation system is used to allow a safe transfer from the vessel to a static offshore structure. Both systems have...

Design of Ampelmann Ship to Calm Buoy Connection

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

Concept Design and Analysis of TWD Motion Compensated Pile Gripper

Nowadays, as it is a easy sequence in construction and installation, the monopile is the most common used support structure. Due to the limitation of water depth and lifting capacity, jack-up vessels gradually become unable to fulfill the demands of monopile installation. Floating vessels can expand the market of wind farminstallation due to the...

Modelling of Coupled Vessel-Ampelmann Systems for Workability Studies

This report presents a method to calculate the frequency characteristics of a vessel that takes into account the dynamic interaction between the vessel and the Ampelmann system. Insight is provided into the dynamic interaction between the vessel and the Ampelmann system and the factors are identified that determine the changing dynamic behaviour...

Ship Motion Compensation Platform for High Payloads; Dynamic Analysis and Control