Heave reduction of the crane tip of a J-class vessel by inducing a roll moment using active ballast systems

Heave reduction of the crane tip of a J-class vessel by inducing a roll moment using active ballast systems

De Jonge, J.S.

Huijsmans, R.H.M. (mentor)

Mechanical, Maritime and Materials Engineering

Maritime and Transport Technology

2017-02-06

To compensate the heaving motion of a payload during deep water offshore installations, hanging from an on-board crane on a monohull vessel, a new concept is being investigated. By actively rolling the vessel using ballasting systems, the coupled heave motion of the crane tip can be reduced significantly. This is investigated by building a computer simulation in Matlab/Simulink, and testing for multiple wave patterns. Two ballast types are proposed for the motion control; transversely moving a solid mass on deck, or pumping ballast water between the ballast wing tanks. Furthermore, both systems were tested at two different ballasting speeds. The results from the simulations showed that, for the wave patterns used during the simulations, the addition of an active ballast system to counter the heave of the crane tip is beneficial, and results in decreases of the heave amplitude of the crane tip of up to 90% when using an active ballast tank ballasting system.

simulation
ship motion
motion control
Matlab
Simulink
balast systems

http://resolver.tudelft.nl/uuid:9911251a-7f9d-4c45-bc4b-e7fe943e3019

2022-02-06

Student theses

master thesis

(c) 2017 J.S. De Jonge