CHAPTER 1.1
Boom Load
Modeling
In previous sub-chapters, the boom model was
reduced to a line or plane, whereby waves, currents
and winds do not affect the shape and
position of the boom. This simplification was
made to get a first estimate of the performance
and capture capability of the boom. The result
of this model is a set of geometric properties
such that the boom can catch and transport
plastic to the platform. The determined properties
are boom length, skirt depth and the effect
of skirt orientation.
During operation under environmental loads,
additional parameters become relevant. Subchapter
3.5 models the system under environmental
loads to determine exerted forces on
the boom and mooring system. Using the results,
a feasible boom segment length is determined.
Additionally, a study was performed to
predict the movement of the skirt and ballast
to identify potential problems regarding water
flow during plastic collection.
This sub-chapter is divided into five parts. Before
describing the model, an introduction to
the simulation program is given. Second, the
environmental loads are discussed, and the
relevant loads are determined which serve as
inputs for the model. Third, the structural part
of the boom model is presented, including two
boom concepts and the mooring system. The
performance of the boom is determined using
wave conditions and ocean currents in a
number of different simulations. The resulting
forces are presented in the fourth part. Further
simulation work on the skirt is discussed in the
final part. More information on the Orcaflex
model and parameters can be found in Appendix
4.