Job ads in Usenet
How to contact me
Vessels distinguish themselves from land vehicles by their
huge mass and the lack of any rigid coupling to their surrounding.
Consequently, their maneuvring motions are much more
difficult to predict and to control. This yields a demand to
calculate them. Oppositely to the analysis of ship designs,
existing ships do not necessarily require expensive and
complicated CFD software to predict their reactions to rudder
executes - the more maneuvers an existing ship sails, the more
secrets about herself she reveals. To exploit this never exhausting
source of data, one can register the manoeuvring motions, save
them and process them to obtain the coefficients of an empirical
mathematical model. After that, a possibility is available to
simulate any other maneuvre numerically in future by means of data
obtained from maneuvres in the past. The development of such
numerical methods and their implememtation as software is my main
professional activity at present. I managed to launch a first
version that works, and I'm working on an improvement of its
reliability and precision. In future, a practical application
will be to display the predicted vessel motion on the electronic
nautical map (ECDIS) on board, so that it can be deflected into
the desired form by the helmsman. This will also provide a
reliable and comfortable alternative to the years of nautical
experience required to estimate the probability of collision
or ground contact in critical situations.
Another possible application could be to supply a more realistic
motion simulation in nautical simulators for
education and training. Additionally, these numerical methods
allow to evaluate model tests in the towing tank and to simulate
those maneuvres numerically that don't fit into this
narrow water surface.
If you are interested in a practical application, you can contact
, the Potsdam Model Basin.
Submerged towed sensor carriers, camera carriers or ROVs are
required for miscellaneous applications in maritime environmental survey,
geosciences and offshore technology. The oscillations of the
towing vessel in waves are transferred to the cable and the towed body.
On the other hand, for most applications it is necessary
that the towed body moves without any oscillations with a
constant velocity in a constant depth. The research projects
aims to develop a numerical modelling of the system and to
contribute solutions to the problem by means of recommended
parameter combinations (cable length, towing speed, depressor inclination)
and countermeasures (dynamic winch control). It focusses on the
dynamic behaviour of submerged cables.
Offshore oil and gas fields are exploited by means of a
pipeline infrastructure whose technological limitations
are determined by strength criteria.
Within several research projects I developed algorithms to
calculate the motions and stresses of the
pipe span that oscillates between the laying vehicle and the soil
when such a pipeline is installed in waves. In that situation,
the pipe experiences loads far above those during operation.